生物
基因
适应(眼睛)
进化生物学
基因组
遗传学
遗传多样性
植物进化
人口
社会学
人口学
神经科学
作者
Yanxia Sun,Tao Deng,Aidi Zhang,Michael J. Moore,Jacob B. Landis,Nan Lin,Huajie Zhang,Xu Zhang,Jinling Huang,Xiujun Zhang,Hang Sun,Hengchang Wang
出处
期刊:iScience
[Elsevier]
日期:2020-05-01
卷期号:23 (5): 101124-101124
被引量:22
标识
DOI:10.1016/j.isci.2020.101124
摘要
Kingdonia uniflora, an alpine herb, has an extremely narrow distribution and represents a model for studying evolutionary mechanisms of species that have adapted to undisturbed environments for evolutionarily long periods of time. We assembled a 1,004.7-Mb draft genome (encoding 43,301 genes) of K. uniflora and found significant overrepresentation in gene families associated with DNA repair, underrepresentation in gene families associated with stress response, and loss of most plastid ndh genes. During the evolutionary process, the overrepresentation of gene families involved in DNA repair could help asexual K. uniflora reduce the accumulation of deleterious mutations, while reducing genetic diversity, which is important in responding to environment fluctuations. The underrepresentation of gene families related to stress response and functional loss of ndh genes could be due to lack or loss of ability to respond to environmental changes caused by long-term adaptation to a relatively stable ecological environment.
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