Category: Climate change

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Recommendations of the Underutilized Plants Symposium

This just in from Hannah Jaenicke, Director of the International Centre for Underutilized Crops (ICUC): 

Over 200 delegates from 55 countries gathered in Arusha, Tanzania 3-7 March 2008 for an International Symposium on “Underutilized plant species for food, nutrition, income and sustainable development”. The Symposium was co-convened under the umbrella of the International Society for Horticultural Science (ISHS) by the International Centre for Underutilised Crops (ICUC) with the Global Facilitation Unit for Underutilized Species, Bioversity International, GlobalHort, Plant Resources of Tropical Africa, and the World Vegetable Center, whose Regional Center for Africa was the local host.

The symposium was a resounding approval of the need for a working group on underutilized plant species to provide a voice to those who are working on these plants. The delegates endorsed the International Society for Horticultural Sciences’ working group on underutilized plants, which is co-chaired by Dr Hannah Jaenicke of the International Centre for Underutilised Crops (ICUC) and Dr Irmgard Hoeschle-Zeledon of the Global Facilitation Unit for Underutilized Species (GFU), and filled it with life and suggestions for future collaboration on research and development projects. A report will be published and circulated in the near future.

Following three days of over 150 scientific presentations, the participants developed a series of recommendations around four pertinent issues.

Continue reading “Recommendations of the Underutilized Plants Symposium”

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Food choices in the future

Glenn, in a comment on Luigi’s wheat heat post, has this to say:

The question about whether to change crops or change varieties needs more attention. There is an institutional inertia, such that CIMMYT would never suggest changing crops. Nor would any other commodity center since they have a vested interest in R+D oriented towards changing varieties. Agricultural biodiversity proponents would also seem to have a conflict of interest. If you could just change crops, the diversity within a crop may not be so important. I don’t believe that, but it would seem that some research on changing varieties or changing crops would be useful.

I think this is a very interesting and important point. (I disagree with the notion that proponents of agrobiodiversity aren’t interested, because diversity will remain important, but that’s a separate issue.) We are forever hearing that X people don’t eat Y, and to a certain extent that is true. The Bengal Famine of 1943 is often trotted out as the canonical example, when rice-eaters starved rather than eat wheat (though the story is definitely a lot more complicated than that). But world history is also absolutely full of counterexamples. Italians, for example, don’t like to be told that their pomodori, peperoncini, fagioli are Johnny-come-latelies to these shores, but they are. And then there’s the way maize and the potato swept all before them. We need to know more about the anthropology of diet and how people do indeed make the choice to adopt new staples and new condiments.

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Wheat and climate change

ResearchBlogging.orgA review paper in the latest Agriculture, Ecosystems and Environment looks at what climate change will do to wheat, and what can be done about it. ((ORTIZ, R. et al. (2008). Climate change: Can wheat beat the heat?. Agriculture, Ecosystems & Environment. DOI: 10.1016/j.agee.2008.01.019)) The lead author is deputy director general at the International Centre for Maize and Wheat Improvement (CIMMYT), and the picture he paints must be keeping him up at nights.

There are 12 different types of places where wheat is grown around the world — so-called “mega-environments.” They range from “high rainfall, hot” (e.g. in Bangladesh) to “low rainfall, severe cold” (around Ankara in Turkey). Some are better than others. One of the best is mega-environment 1, which amounts to 32 million hectares in northwest Mexico, the Indo-Gangetic Plains and the Nile Valley. It accounts for 15% of global wheat production, and it is in trouble.

When you look at the likely 2050 climate, half of the area of the Indo-Gangetic Plains which is now in mega-environment 1 might well need to be re-classified from pretty ideal low rainfall, irrigated, temperate to heat-stressed, short season. That is, conditions will look more like the Gezira in Sudan or Kano in Nigeria. That will reduce yields, affecting 200 million people.

So wheat breeders will have to develop varieties that can maintain yields under higher temperatures, unless you want farmers to switch to another crop entirely. Which might be the easiest thing in some places, actually, but that’s another story.

You can breed for resistance to an abiotic stress such as heat by growing a wide range of genotypes under that stress and looking for the highest yielding genotypes, of course. But what breeders at CIMMYT are now increasingly doing is trying to identify the different physiological attributes which are associated with high yield under stress conditions — things like leaf chlorophyll content during grain filling, for example. And then stacking them up together in new varieties. That’s had some success in breeding for drought resistance. Let’s hope — for the sake of Indian wheat farmers — that it works for heat too.

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Adapting in the Andes

Climate change is leading to an increase in late blight and other diseases in Andean potato fields, and farmers are moving up the mountain in response. They’re also trying to figure out which of their dozens of varieties — plus others from genebanks, especially CIP’s — are going to do best, where. Hear all about it at NPR. There’s a great slideshow too.