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首页> 外文期刊>Ecology and Evolution >The draft genome of the blood pheasant (Ithaginis cruentus): Phylogeny and high‐altitude adaptation
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The draft genome of the blood pheasant (Ithaginis cruentus): Phylogeny and high‐altitude adaptation

机译:血雉草草案(伊斯塔尼氏植物):系统发育和高空适应

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摘要

The blood pheasant (Ithaginis cruentus), the only species in the genus Ithaginis, lives in an extremely inhospitable high‐altitude environment, coping with hypoxia and ultraviolet (UV) radiation. To further investigate the phylogeny of Phasianidae species based on complete genomes and understand the molecular genetic mechanisms of the high‐altitude adaptation of the blood pheasant, we de novo assembled and annotated the complete genome of the blood pheasant. The blood pheasant genome size is 1.04?Gb with scaffold N50 of 10.88?Mb. We identified 109.92?Mb (10.62%) repetitive elements, 279,037 perfect microsatellites, and 17,209 protein‐coding genes. The phylogenetic tree of Phasianidae based on whole genomes revealed three highly supported major clades with the blood pheasant included in the “erectile clade.” Comparative genomics analysis showed that many genes were positively selected in the blood pheasant, which was associated with response to hypoxia and/or UV radiation. More importantly, among these positively selected genes (PSGs) which were related to high‐altitude adaptation, sixteen PSGs had blood pheasant‐specific missense mutations. Our data and analysis lay solid foundation to the study of Phasianidae phylogeny and provided new insights into the potential adaptation mechanisms to the high altitude employed by the blood pheasant.
机译:血雉(Ithaginis Cruentus),伊尔古尼斯属唯一的物种,生活在极其荒凉的高空环境中,应对缺氧和紫外线(UV)辐射。为了进一步探讨基于完全基因组的phasianidae物种的系统发育,并了解血雉的高度高度适应的分子遗传机制,我们组装并注释了血雉的完整基因组。血雉基因组大小为1.04Ω·GB,支架N50为10.88Ωmb。我们鉴定了109.92 MB(10.62%)重复的元素,279,037个完美的微卫星和17,209个蛋白质编码基因。基于全基因组的phasianidae的系统发育树揭示了三种高度支持的主要植物,其中血雉包括在“勃起的侵蚀落后”。比较基因组学分析表明,许多基因在血雉中被肯定选择,这与对缺氧和/或紫外线辐射的反应相关。更重要的是,在与高海拔适应有关的这些阳性选择的基因(PSG)中,具有血雉特异性的畸形突变。我们的数据和分析奠定了植物病学研究的实心基础,并为血雉采用的高海拔潜在的适应机制提供了新的见解。

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