There’s an important post entitled Vegetables of Mass Destruction over at The Daily Kos, a blog. Important not so much for the content, most of which is familiar, well-meaning and just a tad parochial, but for the location. The Daily Kos is one of the most popular sites in the blogosphere, averaging around half a million visits a day. If just some of those readers go away with a slightly better appreciation of the value of agricultural biodiversity, that will be A Good Thing. So thanks to cookiebear and The Daily Kos for their support.
Late blight origins
Ask anyone working in plant genetic resources for an example of the importance of growing genetically diverse crops and chances are that sooner or later they’ll mention the Irish potato famine, caused by the late blight fungus Phytophtora infestans in the 1840s. But for such an important – and iconic – disease, it is amazing how what we think we know about it keeps changing. There’s been a re-think recently about which strain of the fungus actually caused the outbreak in Ireland. And now there’s DNA work to figure out where the pathogen came from. The debate on that point seems now to have been decided in favour of the Andes.
Seeds shared and saved
“When you save your own seeds, you can pick from the best plants and produce varieties that work well on your land,” he says. “You can maintain the background of genetic diversity, while adapting it to what works best for you.”
Own up, you thought that was a quote from an admittedly articulate local farmer sharing indigenous knowledge, didn’t you? Well, it was, except that this farmer has a PhD and farms in North Carolina in the US. Heritage and heirloom seeds are a big and growing deal over there, and this article in The Independent Weekly is a good account of the whys and wherefores of seed saving and sharing in industrialized countries.
White grapes are mutants
Thought that would get your attention. Actually, what the research summarized here revealed was that a couple of genes mutated independently thousands of years ago in the ancestor of the modern grapevine, whose berries were red. The resulting white variety proved to be the ancestor of almost all of the 3000 or so white grape varieties we have today. This discovery from CSIRO will apparently be useful in marker-assisted breeding.
Audible Darwin
It is easy to forget sometimes that The Origin of Species actually starts with a lengthy discussion of genetic diversity in crops, ornamentals, livestock and pets, although of course Darwin doesn’t call it that. He calls it “variation under domestication,” and you can now hear his seminal words, by downloading 24 hours’ worth of audio files from here. There’s a also a link to an e-text of the book.