Eat This Podcast

Podcast: Play in new window | Download (Duration: 7:18 — 5.9MB)

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This short episode fails to do justice to the man who, more than anyone, first grasped the importance of knowing where and how wheat arose. It does, however, explain why Vavilov wanted to collect the building material of future food security, for wheat and many other crops. In more than 60 countries, Vavilov and his colleagues gathered diversity from farmers’ fields; they died protecting their collections.

Thanks to Luigi Guarino for the photograph of Vavilov’s desk with his route across Ethiopia, and much else besides.

Podcast: Play in new window | Download (Duration: 6:13 — 5.1MB)

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Kamut® is a modern wheat — registered and trademarked in 1990 — with an ancient lineage. The word is ancient Egyptian, and the hieroglyphics may literally mean “Soul of the Earth”. More prosaically, “bread”. The story of its discovery and growing popularity says a lot about our hunger for stories. It is also quite capable of leading hard-nosed molecular biologists astray.

Podcast: Play in new window | Download (Duration: 6:19 — 5.2MB)

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Ancient grains used to be rare and hard to find not because they contained some magical secret for a long and fulfilled life, but because they take a lot more work than modern wheats. Instead of the wheat berry popping free after a gentle rubbing, they need to be bashed and pounded. Now, of course, we have machines to do that kind of thing, but our ancestors were mostly only too happy to abandon hulled wheats, unless they had no option.

Podcast: Play in new window | Download (Duration: 7:48 — 6.3MB)

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Cultivation is not the same as domestication. Domestication involves changes that do the plant no good in the wild, but that make it more useful to the people who cultivate it. Seeds that don’t disperse, for example, and that aren’t all that well protected from pests and diseases. In this episode, where did people begin the process of domesticating wheat, and what set them on the road to agriculture.

Podcast: Play in new window | Download (Duration: 5:29 — 4.5MB)

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Modern bread wheat contains more than five times more DNA than people, in a much more complicated arrangement. As a result, it has taken a fair old while to decode wheat’s genome. Having done so, though, the DNA confirms what plant scientists have long suspected — that bread wheat is the result of two separate occasions on which an ancestor of wheat crossed with a goat grass. The DNA also tells us when those crosses might have happened.