Tag Archives: Mexico

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Discovering pre-Columbian humanity in the Americas

Over recent weeks, Steph and I have been enjoying the latest series of Digging for Britain on BBC2, hosted by Alice Roberts who is Professor of Public Engagement in Science at the University of Birmingham. In this ninth series (as in the earlier programs) she visited digs all over the UK where archaeologists were busy uncovering our distant (and not-so-distant) past, and the lives of the people who lived there.

In one program she visited a (secret) site in Rutland (England’s smallest county in the East Midlands) where, in a farmer’s field, the most remarkable Roman mosaic floor had been uncovered, depicting scenes from the Trojan War. This was only one of many treasures that were ‘discovered’ during the series.

The British landscape has been transformed by multiple waves of immigration and conquest over thousands of years. But scrape away the surface, as archaeologists are wont to do, and fascinating histories begin to emerge, from prehistoric times through to the arrival of the Romans in AD 43, and in the centuries afterwards.

Sites like Stonehenge or the Avebury Stone Circle remind us that humans were living in and modifying these landscapes thousands of years before the Romans arrived on these shores.

Avebury Stone Circle.

Northumberland in the northeast of England (where I now live) is particularly rich in Roman remains. Besides the iconic Hadrian’s Wall, forts like Housesteads or Chew Green, and towns like Corbridge and Vindolanda are a visible reminder that these islands were once under the military control of an empire the like of which the world had never seen before. Northumberland was the northwest frontier.

And after the Romans departed in the 5th century AD, northern tribes such as by Angles, Saxons, and Jutes from continental Europe made these islands their home.

However, I often view our landscape as essentially post-Norman (that is, after 1066) since the Normans (and their descendants) left so many statements of their hegemony: magnificent castles (such as Prudhoe, Warkworth, and Dunstanburgh that stand as proud ruins even today), manor houses, churches and abbeys, and royal hunting parks.

I guess our appetite for the archaeological past was whetted when we moved to Peru in 1973. Within two weeks of landing in Lima in January I had already visited Machu Picchu while attending a meeting in Cuzco. Then, after Steph arrived in Lima in July, we spent many weekends exploring the coast and heading off into the numerous valleys that lead inland from Lima. In December, I took her to Machu Picchu (for a delayed honeymoon!)

Over the three years we spent in Peru, five in Central America, and more recently in the southwestern United States, we have visited a number of iconic pre-Columbian archaeological sites, and others less well known.

It’s not just the remains that various cultures have left behind, however. It’s also understanding their connection with the environment, the types of agriculture practiced for example, and the crops that were domesticated and brought into cultivation (a particular interest of mine).

So permit me to take you on a brief archaeological travelogue through the Americas.

Hiram Bingham III

As I’ve already mentioned Machu Picchu, perhaps I should start there. I guess it’s not only the location of this Incan refuge, but something of the mystery that surrounds it until it was ‘discovered’ by Hiram Bingham III in 1911 (although there are earlier claimants).

But tales of a lost city in Peru certainly caught the public imagination, and soon Machu Picchu was a notable tourist destination. In 1973, the rail journey between Cuzco and Machu Picchu was slow and left early in the morning. Nowadays the line has been upgraded and beside the river (way below the ruins) a small town has sprung up to accommodate the multitude of tourists who descend on Machu Picchu daily from all over the world.

I made just a day visit there in January 1973. However, Steph and I were lucky to reserve a room at the turista hotel that once stood just outside the ruins. So, once most tourists had returned to Cuzco late in the afternoon, we (and a handful of other hotel guests) had the ruins to ourselves. Next morning we breakfasted early to watch the sun rise, and enjoy the peace and quiet of this iconic site until, late morning, it was thronging once again with a trainload of tourists.

In many ways it’s not surprising that Machu Picchu remained ‘undiscovered’ for so long, five centuries after the last Inca took refuge there. Other ruins, further out into the jungle, have been uncovered in recent years, like Choquequirao, a two day hike from Cuzco.

What is remarkable about Cuzco, the Inca capital before the Spaniards arrived in the 16th century, is the juxtaposition of Incan and colonial architecture, in many places the latter built over the former. The beautiful Incan stonework is epitomized, for example, in the 12-sided stone in Calle Jatun Rumiyoc, east of the Plaza de Armas (the city’s main square).

Or the foundations of the Qorikancha temple (right) on which the colonizing Spaniards built the Santo Domingo convent five centuries ago.

Outside and overlooking Cuzco from the north is the impressive Inca fortress Sacsayhuamán (below). It’s not only its size, but especially the precision with which the stones have been placed together, some stones (like that shown below) weighing tens of tons at the very least.

Just 32 km to the northeast of Cuzco, and standing at the head of the Sacred Valley of the Incas is the market town of Pisac. Even in 1973 it was a major tourist attraction, even though it had changed little from almost 40 years previously when my PhD supervisor Professor Jack Hawkes had visited as a young man of 24. Check out these photos I took in 1973, and compare them with scenes in the film that Jack made in 1939 (after minute 25:25).

Above the town, 15th century terraces or andenes stretch up the hillside, where there are also temple remains; due to limited time we didn’t have an opportunity of exploring those nor travel further down the valley to Ollantaytambo where there are also impressive Inca remains.

Andenes above the town of Pisac.

But what is particularly remarkable about the Incas is the relative short period (perhaps a little over 300 years until the Spanish conquest in the mid-16th century) in which they held domain over many of the other cultures that had gone before them. Not only in the mountains, but on the coast as well, as I shall describe a little later.

But talking of terraces, I was fortunate to visit the small town of Cuyo Cuyo in Puno in the far south of Peru, in February 1974 while undertaking some fieldwork for my PhD research. Agricultural terraces built centuries ago are still being farmed communally today (at least when I visited almost 50 years ago).

Potato terraces at Cuyo Cuyo, Puno in southern Peru.

While some terraces had fallen into disrepair, the majority were still being carefully tended, and planted with a rotation of potatoes-oca (a minor Andean tuber crop)-barley or beans-fallow over about an eight year period. Impressive as they are, terraces like those at Cuyo Cuyo can be seen in many valleys all over Peru, but perhaps not so actively farmed as there.

Puno is one of the highest cities in the world, at just over 3800 m (12,556 ft), alongside Lake Titicaca, the highest navigable lake.

On a peninsula overlooking a lake about 33 km northwest of Puno stands a cluster of rather peculiar round towers, known as chullpas, of the most exquisite masonry, mostly ruined. Some of these stand 12 m tall. This is Sillustani, a pre-Incan Aymara cemetery site.

It seems that once this area came under Inca control, many of the chullpas were redressed with Incan masonry, much of what we see today.

One could be forgiven for imagining that the coastal desert of Peru is one huge cemetery, such is the extent of the burial sites where Moche (AD 100 -AD 800) and Chimú civilizations (AD 900 until about AD 1470 when the Incas arrived on the scene), and others, held sway leaving behind a vast array of artefacts that tell us so much about them. Having no written language, their pottery tells us much about the crops they grew, the animals they kept, even their sex lives.

Mummy bundles have been excavated in their thousands, and many of the contents are now carefully stored in one of Lima’s most prestigious museums, with just a fraction on display at any one time. Take a moment to read about the museum and its contents that I published in 2017.

All along the coast there are temples built of mud bricks, like the one below. I don’t remember exactly where this was located, but I think maybe in one of the valleys inland from the coast, 4-500 km north of Lima.

One of the more important ones lies just 40 km (or 25 miles) south of Lima. Pachacamac covers about 240 hectares, and was continuously occupied from about AD 100 until the Spanish conquest, 1300 years later.

North of Lima there are two interesting sites.

Just outside the coastal city of Casma (about 350 km or 165 miles north of Lima) stand the unusual remains of Cerro Sechín, an archaeological complex covering many hectares, and one of the oldest sites in Peru, dating back about 4000 years. The striking elements of this site are the bas-reliefs etched into the stonework depicting war-like scenes, of warriors, mutilation and the like. It really is a most unusual site. Steph and I visited there (with our CIP friends John and Marian Vessey) in 1974.

At Sechín, as at other coastal sites, the archaeological evidence shows that not only did the inhabitants practice agriculture (maize and beans being the domesticated staples) but depended on the abundant marine resources close by.

Further north, outside the city of Trujillo stand the degraded remains of Chan Chan, once the great Chimú capital covering 20 km², and built of adobe bricks. It’s regarded as the largest adobe-built city in the world. The complex comprises plazas and citadels, and because of the extremely arid conditions, many of the walls (and their carvings of animals, birds and marine life) have survived to the present.

While the coastal desert is one of the driest in the world, it does rain heavily from time-to-time, and when we visited the walls were being protected from further rain erosion.

Unfortunately, I never got to view the world-famous Nazca Lines from the air. As you cross the Nazca plain (over 400 km south of Lima) you can see some of the lines stretching into the distance but with no comprehension of what they might represent. Furthermore, indiscriminate vehicular access to this area in the past (even army manoeuvres!) has left indelible tracks across the desert, desecrating some of the incredible figures there.

The Nazca Plain from the Panamericana Sur. You can see vehicle tracks heading off into the desert.

The monkey on the Nazca lines.

On the southeastern side of the Cordillera Blanca in the Department of Ancash the ruins at Chavín de Huántar, a site that was occupied over 3000 years ago, and regarded as the oldest highland culture in Peru.

‘El Castillo’ at Chavín de Huántar.

A stone head or tenon at Chavín de Huántar.

I visited there in May 1973 when collecting potatoes in that part of Peru, and again with Steph and the Vesseys a year later.

Just outside the highland city of Cajamarca (2750 m, about 180 km inland from the coast between Trujillo and Chiclayo) are the Ventanillas de Otuzco, and ancient necropolis (over 2000 years old) carved in the rock face.

Steph and I lived in Costa Rica in Central America for almost five years from April 1976. There are few remains of indigenous cultures around the country (unlike Guatemala or Mexico for instance).

However, just under 20 km north of Turrialba (where we lived) lie the enigmatic remains of Guayabo National Monument, which I wrote about in October 2017.

There’s good evidence however that this site was first occupied over 2000 years ago, until the beginning of 15th century.

In the jungle of northeast Guatemala stands the ruins of ancient Tikal, a Mayan complex dating back more than 2400 years, surely one of the most iconic archaeological sites on the planet (and which even featured in the very first Star Wars movie).

Steph and I flew there in 1977, on an Aviateca DC3, spending one night in one of the lodges. Back in the day it was possible to reach Tikal only by air, but the whole region has now opened up via roads and even an international airport in the nearby city of Flores, just 64 km to the south. I guess the site must now be overrun to some extent by tourists, much like has happened at Machu Picchu. We were fortunate to visit here, as with many of the sites I have described, before they appeared on the everyday tourist routes.

We spent hours wandering around this huge site, and managing to see just a fraction probably. It’s hard to imagine just how steep the temple steps are. No wonder Steph was out of breath. We later learned that she was pregnant when we were there.

It seems that Tikal was conquered, around the 4th century AD, from Teotihuacán from the valley of Mexico. And it’s there, north of present day Mexico City that the important temple complex of Teotihuacán can be found. Its famous Temple of the Sun and others are significant Mesoamerican pyramids standing on a site that covers 21 km². We visited there in April 1975 on our way back to the UK, staying with our friends John and Marian Vessey who had left CIP to join a sister research center, the International Maize and Wheat Improvement Center (CIMMYT) that is located not far from Teotihuacán. I’ve been back there a couple of times in the 1990s and 2000s.

Our elder daughter Hannah moved to Minnesota in 1998 to complete her undergraduate degree at Macalester College in St Paul, then registered at the University of Minnesota for her PhD in psychology. In 2006 she married Michael, and they set up home in St Paul. Grandchildren Callum and Zoë came along in 2010 and 2012, respectively. And since I retired from IRRI in 2010 and returned to the UK, Steph and I have visited them every year, and made some pretty impressive road trips across many parts of the USA. That is until Covid 19 put paid to international travel for the time being.

In 2011, we had the opportunity of fulfilling a lifetime ambition: to travel to the Grand Canyon in Arizona. So we flew from Minneapolis-St Paul (MSP) to Phoenix (PHX) to take in the Grand Canyon, and travel extensively through Arizona and New Mexico. We visited three sites on this trip, but only one, the Canyon de Chelly, was a pre-trip destination. We fortunately came across the other two during the course of our travels.

We stopped in Flagstaff on our first night, having traveled north from Phoenix through the Sedona valley and having our first taste of the magnificent red-rock buttes. Then, the following day as we headed north on US89, we saw a sign to Sunset Crater Volcano National Monument.

Checking the map, I saw that we could make a useful diversion, and also taking in further north Wupatki National Monument, a 100-room pueblo and other buildings in the surrounding small ‘canyons’. It is believed that peoples first gathered here around 1100 AD, just a century after the Sunset Crater Volcano erupted. Even today, Wupatki is revered by the Hopi, Zuni, and Navajo tribes.

After a couple of nights at the Grand Canyon (South Rim), and a detour to Monument Valley we found ourselves in Chinle, in northeast Arizona.

In the heart of the Navajo Nation, Chinle is the gateway to the Canyon de Chelly National Monument. Occupied for thousands of years, Canyon de Chelly is a very special place, and somewhere in the USA that I would return to tomorrow, given half the chance.

It was settled by ancient Puebloans at least 4000 years ago, finding the steep-sided canyon an ideal place to settle, raise their families in a safe environment, and raise their crops. These included, after the Spanish arrival in the Americas in the 16th century, peaches that were destroyed during reprisal raids by the US Army in the late 19th century, led by Indian agent and Army officer Kit Carson. In fact, it was reading a biography of Kit Carson in February 2011 that was the impetus to visit Canyon de Chelly.

We viewed the canyon from the rim only. Access to the canyon floor is limited to just one access point to visitors on foot, who can climb the long way down (800-1000 feet) to view houses built into the cliff face. We could see that from the rim, as well as two others at different locations and at different heights on the canyon wall. The Navajo must have felt they were safe from invaders, but unfortunately not, making a last stand at the tall pillar Spider Rock that you can see in one of the images below.

Spider Rock

The Navajo do provide guided tours into the canyon, and if I ever return, I’ll spend several days there and take the tour.

On the penultimate day of our road trip, passing through Los Alamos (where the first atom bombs were designed) in New Mexico, we’d seen signposts to Bandelier National Monument. There’s good evidence of human settlement in this area over 10,000 years ago; ancestral Puebloan peoples settled here 2000 years ago, but had moved on by the mid-16th century.

Rooms were carved into the soft rock or tuff, with ladders used to scale the cliff face. In a few places rock art can be seen. There is also good evidence of agriculture based on the staple triumvirate of maize, beans, and squashes, as well as hunting for deer. Since we had to make progress towards Albuquerque for the last night before flying back to MSP, we were not able to spend as much time exploring the site as we wanted.

Nevertheless, with our visits to Wupatki, Canyon de Chelly, and Bandelier, we gained an appreciation of ancient lives in these desert environments. Of course there’s more to see and learn about the Chaco culture that thrived in New Mexico. Ancient settlements are scattered all over Arizona, New Mexico, and Colorado.

 

 

 

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If it’s Wednesday, it must be Colombia . . .

Not quite the ‘Road to Rio . . .’
I have just returned from one of the most hectic work trips I have taken in a very long time. I had meetings in three countries: Peru, Colombia, and Mexico in just over 6½ days.

And then, of course, there were four days of travel, from Birmingham to Lima (via Amsterdam), Lima to Cali (Colombia), then on to Mexico City, and back home (again via Amsterdam). That’s some going. Fortunately the two long-haul flights (BHX-AMS-LIM and MEX-AMS-BHX) were in business class on KLM. Even so the journeys from Lima to Cali (direct, on Avianca) and Cali to Mexico (via Panama City, on COPA) were 12 hours and 11 hours door-to-door, respectively, the former taking so long because we were delayed by more than 5 hours.

As I have mentioned in an earlier blog post, I am leading the evaluation of the program to oversee the genebank collections in eleven of the CGIAR centers (known as the Genebanks CRP). Together with my team colleague, Marisé Borja, we met with the genebank managers at the International Potato Center (CIP, in Lima), the International Center for Tropical Agriculture (CIAT, in Cali), and the International Maize and Wheat Improvement Center (CIMMYT, in Texcoco near Mexico City).

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A drop of cognac.

It all started on Sunday 24 July, when I headed off to Birmingham Airport at 04:30 for a 6 o’clock flight to Amsterdam. Not really having slept well the night before, I can’t say I was in the best shape for flying half way round the world. I had a four hour stopover in Amsterdam, and managed to make myself more or less comfortable in the KLM lounge before boarding my Boeing 777-300 Lima flight sometime after noon. There’s not a lot to do on a long flight across the Atlantic except eat, drink and (try to) sleep. I mainly did the first two.

It never ceases to impress me just how vast South America is. Once we crossed the coast of Venezuela and headed south over the east of Colombia and northern Peru we must have flown for about three hours over rain forest as far as you could see. I wish I’d taken a few pictures of the interesting topography of abandoned river beds and oxbow lakes showing through all that dense vegetation. At one point we flew over a huge river, and there, on its banks, was a city, with an airport to the west. I checked later on Google Maps, and I reckon it must have been Iquitos in northern Peru on the banks of the Amazon. Over 2000 miles from the Atlantic, ocean going ships can sail all the way to Iquitos. I once visited Iquitos in about 1988 in search of cocoa trees, and we crossed the Amazon (about two miles wide at this point) in a small motorboat.

Then the majestic Andes came into view, and after crossing these we began our long descent into Lima, with impressive views of the mountains all the way and, nearer Lima, the coastal fogs that creep in off the Pacific Ocean and cling to the foothills of the Andes.

We landed on schedule at Jorge Chavez International Airport in Lima around 18:00 (midnight UK time) so I had been travelling almost 20 hours since leaving home. I was quickly through Immigration and Customs, using the Preferencial (Priority) line reserved for folks needing special assistance. My walking stick certainly gives me the edge these days on airlines these days.

Unfortunately, the taxi that had been arranged to take me to my hotel, El Condado, in the Lima district of Miraflores (where Steph and I lived in the 1970s) was a no-show. But I quickly hired another through one of the official taxi agencies inside the airport (necessary because of the various scams perpetrated by the cowboy taxi drivers outside the terminal) at half the price of the pre-arranged taxi.

After a quick shower, I met up with old friends and former colleagues at CIP, Dr Roger Rowe and his wife Norma. I first joined CIP in January 1973, and Roger joined in July that same year as CIP’s first head of Breeding & Genetics. He was my first boss!

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They were in the bar, and we enjoyed several hours of reminiscences, and a couple of pisco sours (my first in almost two decades), and a ‘lite bite’ in the restaurant. It must have been almost 11 pm before I settled into bed. That was Sunday done and dusted. The work began the following morning.

All things potatoes . . . and more
I haven’t been to CIP since the 1990s. Given the tight schedule of meetings arranged for us, I didn’t get to see much more than the genebank and dining room.

CIP has a genebank collection of wild and cultivated potatoes (>4700 samples or accessions, most from the Andes of Peru), wild and cultivated sweet potatoes (>6400, Ipomoea spp.), and Andean roots and tubers (>1450) such as ulluco (Ullucus tuberosus), mashua (Tropaeolum tuberosum), and oca (Oxalis tuberosa).

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Native potato varieties.

Although potatoes are grown annually at the CIP experiment station at Huancayo, some six or more hours by road east of Lima, at over 10,000 feet in the Mantaro Valley, and sweet potatoes multiplied in greenhouses at CIP’s coastal headquarters at La Molina, the collections are maintained as in vitro cultures and, for potatoes at least, in cryopreservation at the temperature of liquid nitrogen. The in vitro collections are safety duplicated at other sites in Peru, with Embrapa in Brazil, and botanical seeds are safely stored in the Svalbard Global Seed Vault.

With a disease pressure from the many diseases that affect potato in its center of origin—fungal, bacterial, and particularly viruses—germplasm may only be sent out of the country if it has been declared free of these diseases. That requires growth in aseptic culture and treatments to eradicate viruses. It’s quite an operation. And the distribution does not even take into account all the hoops that everyone has to jump through to comply with local and international regulations for the exchange of germplasm.

The in vitro culture facilities at CIP are rather impressive. When I worked at CIP more than 40 years ago, in vitro culture was really in its infancy. Today, its application is almost industrial in scale.

Ana Panta and Rocio Silvestre look after the conservation and distribution of the in vitro collections.
Conditioning of cultures ready for cryopreservation.
Material being prepared for cryopreservation.
Rainer Vollmer leads the cryopreservation work.
Tanks of liquid nitrogen in which the cultures are stored.

Our host at CIP was Dr David Ellis, genebank manager, but we also met with several of the collection curators and managers.

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L to R: Ivan Manrique (Andean roots and tubers), Alberto Salas (consultant, wild potatoes), Marisé Borja (evaluation team), me, René Gómez (Senior Curator), David Ellis.

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Alberto Salas, now in his 70s, worked as assistant to Peruvian potato expert Prof. Carlos Ochoa. Alberto’s wealth of knowledge about wild potatoes is enormous. I’ve known Alberto since 1973, and he is one of the most humble and kind persons I have ever met.

Prior to our tour of the genebank, René Gómez and Fanny Vargas of the herbarium had found some specimens that I had made during my studies in Lima during 1973 and 1974. I was also able to confirm how the six digit germplasm numbering system with the prefix ’70’ had been introduced and related to earlier designations.

It was great to see how the support from the Genebanks CRP has brought about so many changes at CIP.

Lima has changed so much over the past couple of decades. It has spread horizontally and upwards. So many cars! In the district of Miraflores where we used to live, the whole area has been refurbished and become even smarter. So many boutiques and boutique restaurants. My only culinary regret is that the famous restaurant La Rosa Nautica, on a pier over the Pacific Ocean closed down about two months ago. It served great seafood and the most amazing pisco sours.

All too soon our two days in Lima were over. Next stop: Cali, Colombia.

Heading to the Cauca Valley . . . 
Our Avianca flight to Cali (an Embraer 190, operated by TACA Peru) left on time at 10:25. Once we’d reached our cruising altitude, the captain turned off the seat belt sign, and I headed to the toilet at the front of the aircraft, having been turned away from the one at the rear. Strange, I thought. I wasn’t allowed to use the one at the front either. It seems that both refused to flush. The captain decided to return to Lima, but as we still almost a full load of fuel, he had to burn of the excess so we could land safely. So, at cruising altitude and as we descended, he lowered the undercarriage and flaps to create drag which meant he had to apply more power to the engines to keep us flying, thereby burning more fuel. Down and down we went, circling all the time, for over an hour! We could have made it to Cali in the time it took us to return to Lima. We could have all sat there with legs crossed, I guess.

Once back on the ground, engineers assessed the situation and determined they could fix the sensor fault in about a couple of hours. We were taken back to the terminal for lunch, and around 15:30 we took off again, without further incident.

But as we waited at the departure gate for a bus to the aircraft, there was some impromptu entertainment by a group of musicians.

Unfortunately because of our late arrival in Cali, we missed an important meeting with the CIAT DG, who was not available the following days we were there.

CIAT was established in 1967, and is preparing for its 5oth anniversary next year.

Daniel Debouck, from Belgium, is CIAT’s genebank manager, and he has been there for more than 20 years. He steps down from this position at the end of the year, and will be replaced by Peter Wenzl who was at the Global Crop Diversity Trust in Bonn until the end of April this year. Daniel is an internationally-recognised expert on Phaseolus beans.

The CIAT genebank building.

The CIAT genebank has three significant collections: wild and cultivated Phaseolus beans (almost 38,000 accessions), wild and cultivated cassava (Manihot spp., >6600 accessions in vitro or as ‘bonsai’ plants), and more than 23,000 accessions of tropical forages. Here’s an interesting fact: one line of the forage grass Brachiaria is grown on more than 100 million hectares in Brazil alone!

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Me and Daniel Debouck.

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Bean varieties.

The bean collections are easily maintained as seeds in cold storage, as can most of the forages. But, like potato, the cassava accessions present many of the same quarantine issues, have to be cleaned of diseases, particularly viruses, and maintained in tissue culture. Cryopreservation is not yet an option for cassava, and even in vitro storage needs more research to optimise it for many clones.

Mónica Lorena Vélez Tobón is the research assistant for in vitro conservation, and she was checking several cultures from each accession for any contamination.
Excising tissue for in vitro culture.
Cassava samples in vitro.
Germination of bean samples.
Seed cleaning laboratory.
Preparing samples for long term conservation.
Inside one of the cold stores.
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QMS manuals in the germplasm health laboratory.

Like many of the genebanks, CIAT has been upgrading its conservation processes and procedures through the application of a Quality Management System (QMS). A couple of genebanks (including CIP) have opted for ISO certification, but I am of the opinion that this is not really suitable for most genebanks. Everything is documented, however,  including detailed risk assessments, and we saw that the staff at CIAT were highly motivated to perform to the highest standards. In all the work areas, laboratory manuals are always to hand for easy reference.

An exciting development at CIAT is the planned USD18-20 million biodiversity center, with state of the art conservation and germplasm health facilities, construction of which is expected to begin next year. It is so designed to permit the expected thousands of visitors to have good views of what goes on in a genebank without actually having to enter any of the work areas.

On our first night in Cali, our hosts graciously wined and dined us at Platillos Voladores, regarded as one of Cali’s finest restaurants.

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We had the private room for six persons with all the wine bottles on the wall, which can be seen in this photo above.

Arriba, arriba! Andale!
On Saturday afternoon around 15:30, we headed to Mexico City via Tocumen International Airport in Panama City. Cali’s international airport is being expanded significantly and there are now international flights to Europe as well as the USA. This must be great for CIAT staff, as the airport is only 15 minutes or so from the research center.

After takeoff, we climbed out of the Cauca Valley and had great views of productive agriculture, lots of sugar cane.

Tocumen is lot busier than when I was travelling through therein the late 1970s. With several wide-bodied jets getting set to depart to Europe, the terminal was heaving with passengers and there was hardly anywhere to sit down. On our COPA 737-800 flight to Mexico I had chosen aisle seat 5D immediately behind the business class section, so had plenty of room to stretch my legs. Much more comfortable than had I stayed with the seat I was originally assigned. I eventually arrived to CIMMYT a little after midnight.

CIMMYT is the second oldest of the international agricultural centers of the CGIAR, founded in 1966. And it is about to celebrate its 50th anniversary in about 1 month from now. IRRI, where I worked for 19 years, was the first center.

Dr Norman E Borlaug

Unlike many of the CGIAR centers that have multi-crop collections in their genebanks (ICARDA, ICRISAT, and IITA for example), CIMMYT has two independent genebank collections for maize and wheat in a single facility, inaugurated in 1996, and dedicated to two renowned maize and wheat scientists, Edwin Wellhausen and Glenn Anderson. But CIMMYT’s most famous staff member is Nobel Peace prize Laureate, Norman Borlaug, ‘Father of the Green Revolution’.

Tom Payne and Denise Costich are the wheat and maize genebank managers. CIMMYT’s genebank has ISO 9001:2008 accreditation.

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Ayla Sençer

Tom has been at CIMMYT in various wheat breeding capacities for more than 25 years. In addition to managing the wheat genebank, Tom manages the wheat international nurseries. One of the first curators of the wheat collection was Ayla Sençer from Turkey, and a classmate of mine when we studied at Birmingham in 1970 for the MSc in Conservation and Utilisation of Plant Genetic Resources. The CIMMYT wheat collection is unlike many other germplasm collections in that most of the 152,800 samples are actually breeding lines (in addition to landrace varieties and wild species).

Denise joined CIMMYT just a year or so ago, from the USDA. She has some very interesting work on in situ conservation and management of traditional maize varieties in Mexico and Guatemala. A particular conservation challenge for the maize genebank is the regeneration of highland maizes from South America that are not well-adapted to growing conditions in Mexico. The maize collection comprises over 28,000 accessions including a field collection of Tripsacum (a wild relative of maize).

Wheat varieties.
Drying room for maize.
Cleaning maize seeds.
Entering the genebank – using face and card recognition.
The medium-term storage vault, with wheat on the left, maize on the right.
Packed wheat samples.
Denise shows a maize sample.

In recent years has received major infrastructure investments from both the Carlos Slim Foundation and the Bill & Melinda Gates Foundation. New laboratories, greenhouses and the like ensure that CIMMYT is well-placed to deliver on its mission. And the support received through the Genebanks CRP has certainly raised the morale of genebank staff.

On our last day at CIMMYT (Wednesday), we met with Janny van Beem from the Crop Trust. Janny is a QMS expert, based in Houston, Texas, and she flew over to Mexico especially to meet with Marisé and me. When we visiited Bonn in April we only had opportunity to speak by Skype with Janny for jsut 30 minutes. Since the implementation of QMS in the genebanks seems to be one of the main challenges—and success stories—of the Genebanks CRP, we thought it useful to have an in-depth discussion with Janny about this. And very useful it was, indeed!

On the previous evening (Tuesday) Tom, Denise, Marisé, Janny and I went out for dinner in Texcoco, to a well-known tacqueria, then into the coffee shop next door afterwards. No margaritas that night – we’d sampled those on Monday.

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L to R: Janny, me, Tom, Marisé, and Denise.

But on this trip we did have one free day, Sunday. And I met up with members of CIMMYT’s Filipino community, many of them ex-IRRI employees, some of who worked in units for which I had management responsibility. They organised a ‘boodle fight‘ lunch, and great fun was had by one and all.

Hasta la vista . . .
At 6 pm on Wednesday I headed into Mexico City to take the KLM flight to Amsterdam. It was a 747-400 Combi (half passengers, half cargo). I haven’t flown a 747 for many years, and I’d forgotten what a pleasant experience it can be. It’s remarkable that the 747 is being phased out by most airlines; they are just not as economical as the new generation twin engine 777s, 787s, and A350s.

With the new seating configuration, I had a single seat, 4E, in the center of the main deck forward cabin. Very convenient. I was glad to have the opportunity of putting my leg up for a few hours. Over the previous 10 days my leg had swelled up quite badly by the end of each day, and it was quite painful. The purser asked if I had arranged any ground transport at Schipol to take me from the arrival to departure gates. I hadn’t, so she arranged that for me before we landed. The distances at Schipol between gates can be quite challenging, so I was grateful for a ride on one of the electric carts.

But after we went through security, my ‘assistant’ pushed me to my gate in a wheelchair. I must admit I felt a bit of a fraud. An electric cart is one thing, and most welcome. But a wheelchair? Another was waiting for me on arrival at Birmingham. Go with the flow!

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I was all alone in Business Class from Schipol to Birmingham. We were back at BHX on time, and I was out in the car park looking for my taxi home within about 20 minutes, and home at 6 pm.

Now the hard work really begins—synthesising all the discussions we had with so many staff at CIP, CIAT, and CIMMYT. For obvious reasons I can’t comment about those discussions, but visiting these important genebanks in such a short period was both a challenging but scientifically enriching experience.

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PRECODEPA – one of the CGIAR’s first research networks

Establishing a regional program
In April 1976, CIP opened an office in Turrialba, Costa Rica, hosted by the Centro Agronómico Tropical de Investigación y Enseñanza (CATIE). My role there was to support the regional office based in Toluca, Mexico, and to carry out research on breeding potatoes to tropical conditions, and once we’d realized the problem of bacterial wilt, searching for resistance to this insidious disease.


In July 1997, the regional leader, Ing. Oscar Hidalgo (a Peruvian bacteriologist) departed for his PhD studies in the USA, and instead of transferring me to Toluca, the Turrialba office became the regional headquarters. And in doing so, my responsibilities changed considerably; I became CIP’s primary link with the national potato programs in Mexico, Central America and the Caribbean.

I was supported by my boss in Lima, Dr Ken Brown, who had joined CIP in early 1976 to support the Outreach Program, and soon becoming the head of the Regional Research Program, replacing Dick Wurster. Ken was a cotton physiologist, and had spent most of his career in various parts of Africa, especially Nigeria, and just before joining CIP had headed a cotton research project in Pakistan. Ken was a fantastic person to work with – he knew just how to manage people, was very supportive, and the last thing he ever tried to do was micromanage other people’s work. I learnt a great deal about program and people management from Ken.

Towards the end of 1977, Dr John Niederhauser, proposed the idea of a cooperative regional network among several countries. I worked closely with John over about six months developing and refining ideas, and travelling together to meet program leaders (and even ministers and vice ministers of agriculture) in six countries: Mexico, Guatemala, Honduras, Costa Rica, Panama, and the Dominican Republic. In April 1978 a meeting was held in Guatemala City to launch the Programa Regional Cooperativa de Papa – PRECODEPA, with funding from the Swiss Agency for Development and Cooperation (SDC).

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The inaugural meeting of PRECODEPA in Guatemala City, April 1978. L to R (sitting): Ken Brown, me, Richard Sawyer, John Niederhauser (CIP), Carlos Crisostomo (ICTA-Guatemala), unknown. I don’t recognise/remember the two gentlemen standing in the rear.

The SDC was just the right donor agency – one with a long-term commitment. Although I’m not able to determine the current status of PRECODEPA, it was supported by the SDC for more than 25 years, and expanded from the initial six countries to 10 or more, with French and English-speaking countries participating. Of course the original members were all Spanish-speaking – one of the major advantages of this regional program in its early years.

For the next three years, much of my time as CIP’s regional leader was spent supporting PRECODEPA and contributing my own work on bacterial wilt and seed production. However, I have to say that my role during this period – especially during the inception design and development phase – has essentially been removed from the record. And for reasons I could never understand, John Niederhauser chose not to recognize the important contributions that CIP (and me) made to the overall success of PRECODEPA.

Why was PRECODEPA needed, and what did it achieve?
While potato was an important commodity in most of the countries of the region, it was never in the same league as other staples such as maize and beans. Mexico had (and still has) the largest area of potato cultivation in the region, but even this pales into insignificance compared to maize. While agriculture ministries supported potato production, this crop was not a top priority, nor did the countries have the resources (both finance and staff) to support and maintain a fully-rounded potato program. Thus the principal idea behind PRECODEPA was a distributed research effort among the member countries, with each taking leadership in one or more areas of potato research and production which had a high national priority, and sharing that expertise with the other members of the network. This also facilitated support from CIP in that CIP specialists were able to meet with their counterparts from one or two countries in the region rather than all of them, and then the national programs supporting each other, as explained earlier.

Thus, Mexico took a lead in seed potato production and late blight research (Phytophthora infestans; some of the pioneer research funded by the Rockefeller Foundation was carried out in the Toluca valley); Guatemala concentrated on post harvest storage, Costa Rica on bacterial wilt (Ralstonia solanacearum), and Panama on potato cyst nematode (Globodera spp.) After 40 years I cannot remember the lead activities for Honduras and the Dominican Republic. With support from the SDC and back stopping from CIP each country developed its capabilities in its lead area, offered training and technical support to the other members, and in turn received support from the others in those areas where it was ‘weaker’.

Among the first national members of PRECODEPA were Ing. Manuel Villareal (Mexico), who had once served as CIP’s regional leader for Region II, Ing. Alberto Vargas (Vice Minister) and Ing. Fernando Cartín from the agriculture ministry in Costa Rica, Ing. Roberto Rodriguez (IDIAP) from Panama, and Ing. Polibio Vargas from the Dominican Republic. Unfortunately, after 38 years, I am unable to remember the names of the Guatemala (ICTA) and Honduras representatives. In 1979, I think it was, Peruvian scientist Dr Jorge Christiansen was appointed to PRECODEPA and based in Guatemala.

The fact that all original members spoke Spanish was a huge advantage. This greatly facilitated all the nitty-gritty discussions needed to achieve consensus among the members about the advantages of working together – as equals. The fact that the SDC supported PRECODEPA for so many years is one indication of its success. On the SDC website there is this succinct assessment: PRECODEPA’s achievements include increases in yields, output and profitability; substantial reduction in the use of pesticides – representing savings for Central American farmers and reducing the impact on the environment and consumers; the beginnings of a processing industry (French fries, crisps) – meaning regional products entered a market previously dominated by their powerful northern neighbours; production of quality potato seed and the development of a regional potato seed market; and training for thousands of farmers and technicians.

I’m proud to have been part of this innovative program – one of the first such research networks or regional programs established by the centers of the CGIAR.

CIP’s direct involvement
CIP contributed specifically in a couple of areas. In an earlier post I have described the work we did on resistance to bacterial wilt. Some of those resistant materials found their way into the Costarrican seed potato program.

Seed production through rapid multiplication techniques was another important area, and I supported in this by seed production specialist Jim Bryan who spent a sabbatical year with me in 1979-80. We developed further (from Jim’s initial work in Lima) the techniques of stem, sprout and single-node cuttings [1], bringing these to the field to produce disease-free seed potatoes, and help establish a vibrant seed potato industry in Costa Rica.

Since I left CIP (in March 1981) PRECODEPA increased in size, and the members continued to share the coordination of the program among the members. As the information on the SDC website indicates, PRECODEPA was indeed the blueprint for other regional programs on maize and beans, and for other collaborative programs around the world. It was a model for the various consortia that have developed among the centers of the CGIAR and national program partners.

[1] Bryan, J.E., M.T. Jackson & N. Melendez, 1981. Rapid Multiplication Techniques for Potatoes. International Potato Center, Lima, Peru.