Title：
Genome Sequencing of the Endangered Kingdonia uniflora (Circaeasteraceae, Ranunculales) Reveals Potential Mechanisms of Evolutionary Specialization
Authors：
Corresponding
Author：
Sun Yanxia， Deng Tao， Zhang Aidi， Moore Michael J， Landis Jacob B， Lin Nan， Zhang Huajie， Zhang Xu Huang Jinling， Zhang Xiujun*， Sun Hang*， Wang Hengchang*
Pubyear：
2020
Title of
Journal：
Iscience
Paper
Code：
Volume：
23
Number：
5
Page：
101124
Others：
Classification：
Source：
Abstract：
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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