Nat. Biotechnol. 28, 770 (2010); published online 9 August 2010; corrected after print 7 December 2010
In the version of this article initially published, Geertson Seed Farms was spelled “Geerston.” The error has been corrected in the HTML and PDF versions of the article.
The online version of the original article can be found at 10.1038/nbt0810-770a