Wheat that goes around, comes around

ResearchBlogging.orgThere’s lots of fascinating material in Robert Spengler’s new review paper on Agriculture in the Central Asian Bronze Age. 1 This map of the region comes from an earlier paper of his, but sets the scene nicely.

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The thesis of the latest paper is that the conventional model of mixed agropastoralism in Central Asia gradually becoming typical nomadic pastoralism needs to be rethought. In fact, Spengler says, after looking in detail at the archaeological evidence, the mixed pastoral economies of the Bronze Age, with their distinctive package of crops derived from both further east and west in place by 2500 BC, actually intensified into the Iron Age. The result was “irrigated agriculture, sedentary villages, and a drastically altered anthropogenic landscape.”

I may come back to that in a later post, but here I want to focus on what I learned about wheat. I knew that the Green Revolution was based in large part on the use of Rht genes from a Japanese wheat called Norin 10. These genes cause dwarfing, and allow the wheat plant to divert energy into the grain rather than the straw. Yields shot up in places like India, and the Borlaug legend was born.

What I didn’t know is that there was so-called “Indian dwarf wheat” in Afghanistan, Pakistan and northern India before the Green Revolution, characterized by

…dense strong culms and erect blades, a condensed spike which expresses with short awns, glumes, and a hemispherical grain. In addition, it has increased tillering and a reduced rate of lodging…

All of the wheat found in Bronze Age Central Asia seems to have been of this type too, as far as one can tell by comparing archaeobotanical remains with herbarium and genebank material. And similar material turns up in sites in Japan and Korea a millennium and more later. Spengler is circumspect, asking for genetic studies, but it is certainly an intriguing possibility that

…pre-Harappan farmers in India bred a phenotype that would later alter agriculture globally.

Beyond Thundervault

The recent media frenzy over ICARDA’s request of some of its seed deposits back from Svalbard reminded me of this little piece I wrote a couple of years back. It seems to have gone from the internet, which is another reason to resurrect it.

The God Particle and the Doomsday Vault: I was half expecting the divine connection that could be read into those names to be ecstatically seized upon during the recent media hysteria over the unveiling of the Higgs boson. 2 And dreading it. How would I field the inevitable questions about the relative value to humanity of these two cold, rock-hewn mountain tunnels?

That nothing came of it is largely due to the fact that the Higgs’ celestial cognomen seems, surprisingly, to have fallen out of favour of late. I wish I could say the same about the Svalbard Global Seed Vault’s own heavenly handle. It looks as if that is going to stick, alas. Makes one wonder, in awe and envy, how one’s physicist colleagues managed the minor miracle of dissuading the media from using such a wonderfully catchy, though no less silly, name as the God Particle after it had already pretty much caught on.

Yes, silly. The Higgs may give matter mass, but it doesn’t explain everything; it’s important all right, but just one fundamental particle among many. And the seed samples stored in the Vault were never supposed to jump-start a global return to industrial agriculture after the devastations of alien invasion, virus-induced zombification, Mayan calendrical glitch, asteroid strike or Biblical flood redux.

No, those seed samples in Svalbard are no more — and no less — than backup safety duplicates of the collections of crop diversity maintained in more “normal”, and more fragile, genebanks around the world. They are there in case something bad happens to a genebank, as it unfortunately sometimes does, not to mitigate planetary calamity. We’re talking Typhoon Maxine sadly taking out a roomful of seed samples here, not Mad Max roaming a blighted post-Armageddon wasteland inhabited by wild-eyed mutants bent on establishing organic homegardens and maybe even, one day, praise be, a neighbourhood farmers’ market. Calling it the Doomsday Vault oversells it rather, like one of those Medieval relics which turned out to be the bones of a sheep, rather than a saint. So unnecessary. So silly.

But hang on. Even the more optimistic carbon dioxide emission scenarios lead to predictions for future climates in many parts of the world that fall little short of what the summer version of the nuclear winter would look like. That will hammer crop production mercilessly, the models show, particularly in southern Africa and South Asia. And on top of that there will probably be new plagues and pestilences…

To adapt to the new conditions, some changes could be made in agricultural practices, of course, and there are some heroically resilient crops out there. But if we are to avert an agricultural apocalypse, we are going to have to breed most crops to cope with the hell they’ll find themselves in. The raw material for doing that is in the world’s genebanks, and increasingly nowhere else. Yet genebank funding is in many cases inadequate and precarious, and getting less secure. And accidents do happen. The Vault is safe from most sources of harm, and does its job on a shoestring, guaranteed in perpetuity, if not eternally, by the Crop Trust’s endowment.

Suddenly, that silly name doesn’t seem so silly after all, does it? Congratulations to the physicists on nailing their God Particle. But I’ll take my tunnel over theirs any day, and you can call it whatever you want.

LATER: And it’s back!

Brainfood: Intensification, Diversity double, Mexican homegardens, Coffee certification, US crop diversity, Fig identification, Wild rice origins, Domestication & trophic interactions

Nibbles: Oyster wars, Bitter veggies, Saffron, Ag & development, Cannabis taxonomy, Mold evolution, Svalbard & ICARDA, Blueberry taste

  • The land sparing vs sharing debate encapsulated in a controversy over San Francisco oyster farming.
  • Bitter is good.
  • BBC’s Farming Today on saffron in England, among other things.
  • Want sustainable development? Invest in agriculture.
  • Growing weed: here comes the science.
  • “When you chew on a Camembert rind, you’re eating a solid mat of mold.” And probably GM to boot.
  • Why do I sound so totally unprepared?
  • Breeding better blueberries.