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🥔🥔🥔 Our herbarium genomics work with @hernanaburbano et al. is out in @NatureEcoEvo! We reconstructed potato introduction and adaptation to Europe using historic genomes (including Darwin's specimens); extract below:
Historic records show that European potatoes came from Andes, yet morphologically and phenologically they resemble lowland Chilean landraces. No wonder why!
Our temporal series of potatoes' genomes in Europe show that it was first introduced from Andes, and admixed with Chilean potatoes in 19th century.
At about the same time potato gained adaptation to tuberizing in long days, which allowed it to be successfully cultivated in winter-constrained conditions in Europe. Interestingly, our small sample of Chilean landraces were adapted differently.
Making its story even more complex, European potato admixed with wild relatives. We are likely picking up the genome-wide signal from early 20th century resistance breeding.
All this explains why the diversity of European potato matches that of its ancestors in the center of diversity in South American Andes (although we have a lot of work catching up with the tastiness).
We also found candidate genes for pre-adaptation to long-day tuberization. These were previously described to play a role in tuberization initiation. Together, we show 350 years of potato evolution in Europe by tracing its molecular adaptive potential and complex ancestry.
Here is the read-only version without paywall: rdcu.be/bHBXz
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