The genus Quercus, commonly known as oaks, is one of the most evolutionarily successful genera in the Northern Hemisphere in terms of species diversity, biomass and distribution range. Oaks can usually live up to a few hundred years, and during the long lifespan they exhibit high tolerance to various abiotic and biotic threats. Meanwhile, oaks are also well known for their extensive interspecific gene flow, which is believed to be helpful for their wide dispersal. These traits make Quercus an ideal genus for studying adaptive introgression.
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Source: Phys.org