Two evolutionary histories in the genome of rice: the roles of domestication genes.
Two evolutionary histories in the genome of rice: the roles of domestication genes.
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水稻基因组的两条进化史:驯化基因的作用
DOI:
10.1371/journal.pgen.1002100
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发表时间:
2011-06
期刊:
影响因子:
4.5
通讯作者:
Shi S
中科院分区:
文献类型:
--
作者:
He Z;Zhai W;Wen H;Tang T;Wang Y;Lu X;Greenberg AJ;Hudson RR;Wu CI;Shi S
Genealogical patterns in different genomic regions may be different due to the joint influence of gene flow and selection. The existence of two subspecies of cultivated rice provides a unique opportunity for analyzing these effects during domestication. We chose 66 accessions from the three rice taxa (about 22 each from Oryza sativa indica, O. sativa japonica, and O. rufipogon) for whole-genome sequencing. In the search for the signature of selection, we focus on low diversity regions (LDRs) shared by both cultivars. We found that the genealogical histories of these overlapping LDRs are distinct from the genomic background. While indica and japonica genomes generally appear to be of independent origin, many overlapping LDRs may have originated only once, as a result of selection and subsequent introgression. Interestingly, many such LDRs contain only one candidate gene of rice domestication, and several known domestication genes have indeed been “rediscovered” by this approach. In summary, we identified 13 additional candidate genes of domestication.
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