Category: In situ

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“It was serendipity that we had the seeds lying around”

Our title is evolutionary geneticist Arthur Weis to journalist Carl Zimmer on the topic of an experiment he and colleagues at UC Irvine carried out a few years ago where they compared those seeds — that had been “lying around” in the intervening few years in a cool, dry place — with seeds of the same species newly collected from the same sites. The result of the experiment was that…

…[t]he newer plants grew to smaller sizes, produced fewer flowers, and, most dramatically, produced those flowers eight days earlier in the spring. The changing climate had, in other words, driven the field mustard plants to evolve over just a few years.

The point of Zimmer’s article is that evolution can take place over short periods of time, and that because of climate change “life will undergo an evolutionary explosion.” ((We’ve blogged about this before.)) What Zimmer doesn’t say is that we have about 6.5 million similar samples of seeds in the world’s crop genebanks, and not by serendipity. Some date back decades. There would be a great research programme in comparing the genetic makeup of those samples with newer samples. Assuming that the populations are still there. And that there is enough documentation associated with the samples to find their original collecting sites.

A final thought. The assumptions behind the ecological niche modeling work which has been proliferating of late to predict changes in distributions, for example of crop wild relatives, is that the species don’t move or evolve fast enough to keep pace with climate change. They may well in fact evolve, adapt and survive, and that would certainly be a good thing. But helping them do that through in situ protection should not be an argument for downplaying the complementary importance of ex situ conservation. After all, with the kind of selection pressures likely to be involved, populations are very likely to be significantly genetically narrower in the future. Whether the species adapts or not, we’ll still need to collect seeds and store them in genebanks if we are to have available for use as much as possible of the genetic diversity that is currently — just — still in the field.

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Nibbles: Red rice, Drought squared, Slow Food, Coffee, Cassava, Horses, Wheat, Ketchup

  • Saving red rice in India. Note comment from Bhuwon.
  • India again: “We have not been able to sow rice. Our corn crop has been destroyed by pests. We have nothing to eat. We have nothing to feed our cattle.”
  • Morocco: “The farmers started using more subterranean water, but that has almost been used up, putting us on a straight line to desertification.” But, “[r]esearchers have also introduced new varieties of grain that in laboratory tests have proven resistant to water stress or drought.”
  • Another Slow Food interview. Zzzzzzzzzz.
  • Cuppa weird joe?
  • IITA and others save cassava in West Africa.
  • Nice photo essay on a thoroughbred stud farm.
  • Take the wheat quiz.
  • Where is our heirloom ketchup?
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Fermentation in the Himalayas

The recent post on fermentation clearly struck a chord with our friend and colleague Bhuwon Sthapit of Bioversity International. Here’s his contribution to the discussion.

It is interesting to note the myriad different ways in which locally available cereals and other sources of food are fermented by local people through the action of microorganisms, either naturally or by adding a starter culture, which modifies the substrate biochemically and organoleptically into and edible product, generally nutritious, tasty and safe. These inexpensive, culturally acceptable traditional foods provide basic diets and sources of nutrition. In the Hindu-Kush Himalayan region alone more than 20 varieties of ethnic fermented food are found and more than 10 types of fermented beverages are consumed in Nepal, Sikkim and Bhutan. Most of them are common, while other fermented foods are less familiar and confined to particular communities and locations.

Continue reading “Fermentation in the Himalayas”

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Draft 2nd State of the World’s PGR is out

I should really have pointed to this earlier. The draft Second Report on the State of the World’s Plant Genetic Resources for Food and Agriculture (SOTW2) was presented for review to the Fourth Session of the Intergovernmental Technical Working Group (ITWG) on Plant Genetic Resources for Food and Agriculture held at FAO headquarters, Rome on 15-17 July 2009. The First State of the World’s PGRFA report is of course more than ten years old.

All the documents relevant to the ITWG meeting are online, including the draft SOTW2 report, as a large pdf. The idea is that, after whatever changes the ITWG recommended are taken into account, the final version of the SOTW2 will be presented to the Twelfth Session of the Commission on Genetic Resources for Food and Agriculture (Rome, 18-23 October 2009) for endorsement.

The process of developing SOTW2 has been tortuous, and no doubt far from perfect, but this does constitute the best data we have on what’s happening in plant genetic resources conservation and use worldwide.

I’m afraid I can’t resist quoting some headline numbers on the ex situ side, but there are also chapters on in situ, use, national programmes and legislation, regional and international collaboration, access and benefit sharing the full monty.

Chapter 3 shows that the total number of accessions conserved ex situ world-wide has increased by approximately 20% (1.4 million) since 1996, reaching 7.4 million. It is estimated, however, that less than 30% of this total are distinct accessions (1.9 – 2.2 million). During the same period, new collecting accounted for about 220,000 accessions.

And again:

There are now more than 1,750 individual genebanks worldwide, about 130 of which hold more than 10,000 accessions each. There are also substantial ex situ collections in botanical gardens, of which there are over 2,500 around the world. Genebanks are located on all continents, but there are relatively fewer in Africa compared to the rest of the world. Among the largest collections are those that have been built up over more than 35 years by the CGIAR and are held in trust for the world community. In 1994 the Centres signed agreements with FAO bringing their collections within the International Network of Ex Situ Collections. These were subsequently brought under the International Treaty on Plant Genetic Resources for Food and Agriculture in 2006 (ITPGRFA – see Chapter 7).

Still a lot of room for rationalization. Here’s a map of the localities of those 130 large genebanks, which is also available on the WIEWS website (click to enlarge).

gbanks130

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Ex situ redux

After a period in which ex situ conservation has been downplayed by the conservation community (except for agrobiodiversity where it is still the main conservation strategy) ex situ conservation is now widely accepted as an increasingly necessary complement to in situ forms of conservation (IUCN 2002; BGCI 2000), especially protected areas (e.g. Abanades García & al. 2007).

That’s from a new report for the Council of Europe entitled “The impacts of climate change on plant species in Europe,” prepared by Prof. Vernon Heywood of the School of Biological Sciences, University of Reading, with contributions by Dr Alastair Culham. You’ll find it on p. 39 after a very thorough review of the issues. Nice to see such a bold statement. The report is one of several prepared for the Group of Experts on Biodiversity and Climate Change of the Convention on the Conservation of European Wildlife and Natural Habitats. Thanks to Danny for the tip.