期刊
ISCIENCE
卷 23, 期 5, 页码 -出版社
CELL PRESS
DOI: 10.1016/j.isci.2020.101124
关键词
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资金
- Chinese Academy of Sciences [XDA20050203]
- Program Foundation for the Backbone of Scientific Research by Wuhan Botanical Garden, Chinese Academy of Sciences [Y855241G01]
- Major Program of National Natural Science Foundation of China [31590823]
- National Key R and D Program of China [2017YFC0505200]
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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