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首页> 中文期刊> 《基因组蛋白质组与生物信息学报：英文版》 >A Mitochondrial Genome Sequence of the Tibetan Antelope(Pantholops hodgsonii)

A Mitochondrial Genome Sequence of the Tibetan Antelope(Pantholops hodgsonii)

         
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摘要

To investigate genetic mechanisms of high altitude adaptations of native mammalson the Tibetan Plateau, we compared mitochondrial sequences of the endangeredPantholops hodgsonii with its lowland distant relatives Ovis aries and Capra hir-cus, as well as other mammals. The complete mitochondrial genome of P. hodgsonii(16,498 bp) revealed a similar gene order as of other mammals. Because of tandemduplications, the control region of P. hodgsonii mitochondrial genome is shorterthan those of O. aries and C. hircus, but longer than those of Bos species. Phy-logenetic analysis based on alignments of the entire cytochrome b genes suggestedthat P. hodgsonii is more closely related to O. aries and C. hircus, rather than tospecies of the Antilopinae subfamily. The estimated divergence time between P.hodgsonii and O. aries is about 2.25 million years ago. Further analysis on natu-ral selection indicated that the COXI (cytochrome c oxidase subunit I) gene wasunder positive selection in P. hodgsonii and Bos grunniens. Considering the sameclimates and environments shared by these two mammalian species, we proposedthat the mitochondrial COXI gene is probably relevant for these native mammalsto adapt the high altitude environment unique to the Tibetan Plateau.

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