AI Article Synopsis
- Introgression, or the transfer of alleles between species, can significantly affect how species evolve and adapt to new environments, particularly in plants.
- Hybrid offspring from different species may not always be viable, but introgression can still add valuable genetic diversity that aids evolution.
- The article highlights that adaptive introgression is especially beneficial for species that are struggling to survive in changing conditions or are expanding their habitats, as it helps them move closer to their fitness optimum.
Article Abstract
Alleles that introgress between species can influence the evolutionary and ecological fate of species exposed to novel environments. Hybrid offspring of different species are often unfit, and yet it has long been argued that introgression can be a potent force in evolution, especially in plants. Over the last two decades, genomic data have increasingly provided evidence that introgression is a critically important source of genetic variation and that this additional variation can be useful in adaptive evolution of both animals and plants. Here, we review factors that influence the probability that foreign genetic variants provide long-term benefits (so-called adaptive introgression) and discuss their potential benefits. We find that introgression plays an important role in adaptive evolution, particularly when a species is far from its fitness optimum, such as when they expand their range or are subject to changing environments.
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| http://dx.doi.org/10.1146/annurev-genet-021821-020805 | DOI Listing |
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