Assisted migration: all there is to know (at the moment)

We’ve written before about assisted migration — giving plants (and animals) a helping hand to ensure that they can keep up with shifts in the areas in which they can thrive. “Managed relocation” is becoming a hot topic, which may be why the Chicago Botanic Garden is holding a one-day seminar on 11 June 2010. Details are currently sparse, but if you go, and especially if anyone says anything about crops or wild relatives, please share a report.

Diverse points of view on feeding Africa

We like to embrace different points of view here ourselves, though we also like to think there’s a certain consistency to most of what we say and do. Maybe that’s why I find it strange that a single blog, on a single day 1 can feature two such divergent posts. One — Homegrown Solutions to Alleviating Hunger and Poverty — is a thorough look at the role of indigenous fruit and vegetable crops in delivering a healthy and nutritious diet. The other — Breeding for Climate Change — links, almost without comment, to a report on the Bill & Melinda Gates Foundation’s project to deliver just two (one conventionally bred, one genetically engineered) drought-resistant maize varieties to sub Saharan Africa.

I have no doubt that genetic engineering, precision farming and other high-tech tools of modern intensive farming can supply all the calories the world will need even when it hosts 9 billion people. I do doubt that the 9 billion will actually get those calories. And I know that calories alone are not enough. People need nourishment, not merely calories.

Costs, benefits, and the search for disease resistance

An epidemic of Fusarium head blight swept through the United states between 1998 and 2000, costing the wheat industry an estimated US$ 2.7 billion. That’s right: billion.

Salvation came from Chinese and Japanese landraces, especially a Chinese wheat called Sumai 3. To prepare for the inevitable mutation of the fungus, scientists at the USDA have broadened their search for resistance. They examined 87 Asian varieties of wheat, many of them old landraces, and found good levels of resistance in 26 of them. Better yet, some of the resistance genes seem to be different from the ones derived from Sumai 3, which means that they might offer protection against different varieties of the fungus.

Just knowing that various resistance genes exist, and having markers to select more resistant crosses from breeding efforts means that future outbreaks can probably be more effectively dealt with, which is reassuring. More to the point, for our purposes, this research raises again the question: how can anyone doubt the value of genebanks? Just one disease cost just one country US$2.7 billion over three years. Genebank accessions contain the solutions. Do you really need to know the cost of every accession to decide whether genebanks are worthwhile?