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Since Darwin, the mechanism of adaptive evolution has been a core scientific issue in evolutionary biology.
adaptability is the most basic ability of living in a diverse environment. One of the core factors of
adaptability is the high and low genetic diversity, which is the fundamental to ensure the survival and reproduction of species in the changing ecological environment.
the effects of various natural selections are different in terms of the influence on genetic diversity.
positive selection is shown as fixing a certain favorable variant of alleles, negative selection is shown to remove new rare variations, and balanced selection is to show that many isometrics have certain selection advantages to be able to coexist.
, therefore, only balanced choices can maintain and improve the genetic diversity of the population in these three natural choices.
at present, the study of balanced selection at the genome-wide level has only progressed in humans and gorillas, and similar studies on plants have not been reported, especially as it is not clear what role balance selection sites function in plant evolution.
, Guo Yalong Ofo of the Institute of Botany of the Chinese Academy of Sciences, through a study of the whole genome level of the model plant amoeba and its near-neighborgen genus species, found that although the evolutionary amoeba has been separated from the genus species for 8 million years, there are still many ancient balanced selection sites. Further studies
show that there is significant ecological differentiation between groups with different hapnotypes, indicating that the genes selected by balance are closely related to plant adaptation.
the study provides the first case for plant balance selection studies at the whole genome level, revealing the presence of a large number of balanced selection sites in plants and suggesting that these sites play a key role in plant adaptation.
this achievement is of great significance for understanding the basic theoretical problems of evolutionary biology.
the research was published online November 15 in the international academic journal Genome Biology.
Guo Yalong Research Group Assistant Researcher Wu Qiong is the first author, And Guo Yalong is the author of the newsletter.
the research was supported by the National Natural Science Foundation's "Excellent Youth Fund", "Microevolution Major Research Program" and the Chinese Academy of Sciences' 100-person Program.
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