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Positive selection over the mitochondrial genome and its role in the diversification of gentoo penguins in response to adaptation in isolation

Nature Scientific Reports volume 12, Article number: 3767 (2022)

Our study suggests that local adaptation of gentoo penguins has emerged as a response to environmental variability promoting the fixation of mitochondrial haplotypes in a non-random manner. Mitogenome adaptation is thus likely to have been associated with gentoo penguin diversification across the Southern Ocean and to have promoted their survival in extreme environments such as Antarctica. Such selective processes on the mitochondrial genome may also be responsible for the discordance detected between nuclear- and mitochondrial-based phylogenies of gentoo penguin lineages.

  https://www.nature.com/articles/s41598-022-07562-0

 

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