The publication of “Legacy genetics of Arachis cardenasii in the peanut crop shows the profound benefits of international seed exchange” in PNAS rang a faint bell:
Here, we uncover the contribution of one wild species accession, Arachis cardenasii GKP 10017, to the peanut crop (Arachis hypogaea) that was initiated by complex hybridizations in the 1960s and propagated by international seed exchange.
And yes, it turns out we had blogged about this wild peanut species more than a decade ago, in Another feel-good crop wild relative story.
Some things have changed since 2008, I’m happy to say. I seem to have had some difficulty pulling together data ((And the links are now dead.)) at the time, whereas Genesys had no trouble at all showing me 45 accessions. And GKP 10017 even has a DOI now.
Pleased you enjoyed the PNAS paper! From our counts the available Arachis cardenasii accessions all derive from 19 collections, one of which was used to generate the benefits described in the paper.
Your previous blog detailed the impact of Charles Simpson’s crosses in Texas, which used the “tetraploid route” of introgression which donated a chromosome segment from A09 which confers root knot nematode resistance. The PNAS paper focuses mostly on progeny from the North Carolina “hexaploid route”, which ended up traveling most around the world. These introgressions, from A02 and A03, confer resistance to Late Leaf Spot, Rust, and to a lesser extent Web Blotch.
The last two paragraphs of the discussion deal with unintended effects of the Convention on Biological Diversity. The restrictions on collection and seed exchange nowadays would make the repetition of this feel good story, practically impossible. Whilst habitat destruction continues, collection in Bolivia has stopped for some time…