James and the Giant Corn Rotating Header Image

October 31st, 2009:

Predictable Spinning of Squash

I dont have any picture of pumpkins handy, so this watermelon (and fellow cucurbit) will have to do.

I don't have any picture of pumpkins handy, so this watermelon (and fellow cucurbit) will have to do.

What could be a more fitting topic for a Halloween post than cucurbits, the family of plants that (in addition to crops like watermelon and cucumber) include squash and pumpkins? Yeah, I know it’s a stretch.

A week ago a paper came out in PNAS (the proceedings of the national academy of sciences. A very prestigious journal, one step down from Science or Nature), that showed when an artificially inserted gene in squashes that provided virus resistance was introgressed into a wild related species it actually made them less fit. Short version: the wild squash also suffer from the virus which attacked domesticated squash but are also attacked by beetles, and the beetles prefer to eat squash without the virus. Tomorrow’s Table has a much better and more complete explanation of the research.

In that post the very first commenter predicted the result, that in this particular case a transgene (like most genes involved in domestication) was beneficial for farmers but not for wild plants, would be spun into “another failure for GMOs” when the real message is “we were worried about pollen drift, but in this case it turns out we didn’t have to be.”

He was right. (more…)