PDF(Pubmed)
Abstract：
The mitochondrion, which is an intracellular organelle responsible for most of the energy-producing pathways, can have its genome targeted for climate-driven selection. However, climate-driven mitochondrial selection remains a sparsely studied area in reptiles. Here, we reported the complete mitochondrial genome sequence of a lacertid lizard (Takydromus intermedius) and used mitogenomes from 54 species of lacertid lizards to study their phylogenetic relationships and to identify the mitochondrial genes under positive selection by climate. The length of the complete mitochondrial genome sequence of T. intermedius was 17,713 bp, which was within the range of lengths (17,224-18,943) ever reported for Takydromus species. The arrangement of mitochondrial genes in T. intermedius was the same as in other congeneric species. The 54 lacertid species could be divided into three geographically and climatically different clades. We identified three mitochondrial genes (ATP6, ATP8, and ND3) under positive selection by climate, and found that isothermality, temperature seasonality, precipitation of wettest month, and precipitation seasonality were the most important climatic variables contributing to the gene selection.
摘要：
线粒体,它是细胞内细胞器，负责大多数能量产生途径，可以将其基因组定位为气候驱动的选择。然而,气候驱动的线粒体选择仍然是爬行动物研究的稀疏区域。这里,我们报道了一种蜥蜴(Takydromusintermedius)的完整线粒体基因组序列,并利用54种蜥蜴的有丝分裂基因组研究了它们的系统发育关系,并鉴定了受气候正向选择的线粒体基因.T.intermedius完整的线粒体基因组序列的长度为17,713bp，这在Takydromus物种报道的长度范围内（17,224-18,943）。T.intermedius中线粒体基因的排列与其他同类物种相同。54种lacertid物种可分为三个地理和气候不同的进化枝。我们确定了三个线粒体基因（ATP6，ATP8和ND3）在气候阳性选择下，发现等温性，温度季节性，最潮湿月份的降水，降水季节性是影响基因选择的最重要的气候变量。
