Genetic and Geographic Patterns of Duplicate DPL Genes Causing Genetic Incompatibility Within Rice: Implications for Multiple Domestication Events in Rice

doi:10.1016/j.rsci.2020.11.007

	Genetic and Geographic Patterns of Duplicate DPL Genes Causing Genetic Incompatibility Within Rice: Implications for Multiple Domestication Events in Rice
	Xu Xun 1; Ge Song1 ; Zhang Fumin 1
	2021
发表期刊	RICE SCIENCE
ISSN	1672-6308
卷号	28 期号:1 页码:58-68
摘要	Strong genetic incompatibilities exist between two primary rice subspecies, indica and japonica. However, the wild ancestors of rice, O. nivara Sharma et Shastry and O. rufipogon Griff., are genetically compatible. How this genetic incompatibility became established has not been clearly elucidated. To provide insights into the process, we analyzed a pair of hybrid sterility genes in rice, DOPPELGANGER 1 (DPL1) and DOPPELGANGER 2 (DPL2). Either of the two loci can have one defective allele (DPL1- and DPL2-). Hybrid pollen carrying both DPL1- and DPL2- alleles is sterile. To explore the origination of DPL1- and DPL2-, we sequenced the DPL1 and DPL2 genes of 811 individual plants, including Oryza sativa (132), O. nivara (296) and O. rufipogon (383). We then obtained 20 DPL1 and 34 DPL2 sequences of O. sativa from online databases. Using these sequences, we analyzed the genetic and geographic distribution patterns of DPL genes in modern rice and its wild ancestors. Compared with the ancestral populations, DPL1- and DPL2- showed reduced diversity but increased frequency in modern rice. We speculated that the diversity reduction was due to a historic genetic bottleneck, and the frequency had likely increased because the defective alleles were preferred following this artificial selection. Such results indicated that standing variances in ancestral lines can lead to severe incompatibilities among descendants. Haplotype analysis indicated that the DPL1- haplotype of rice emerged from an O. nivara population in India, whereas the DPL2- haplotype emerged from O. rufipogon in South China. Hence, the evolutionary history of DPLs conforms to the presumed multiple domestication events of modern rice.
关键词	rice DPL gene domestication genetic incompatibility phylogeography
学科领域	Agronomy ; Plant Sciences
DOI	10.1016/j.rsci.2020.11.007
收录类别	SCI
语种	英语
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000600653900007
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1876-4762
资助机构	Chinese Academy of Sciences [XDA08020103, XDB31000000] ; National Natural Science Foundation of China [31470332, 91731301, 91231201] ; CHEN Chengbin of Guangxi Academy of Agricultural Sciences
作者邮箱	zhangfm@ibcas.ac.cn
作品OA属性	gold
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/26476
专题	系统与进化植物学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Xu Xun,Ge Song,Zhang Fumin. Genetic and Geographic Patterns of Duplicate DPL Genes Causing Genetic Incompatibility Within Rice: Implications for Multiple Domestication Events in Rice[J]. RICE SCIENCE,2021,28(1):58-68.
APA	Xu Xun,Ge Song,&Zhang Fumin.(2021).Genetic and Geographic Patterns of Duplicate DPL Genes Causing Genetic Incompatibility Within Rice: Implications for Multiple Domestication Events in Rice.RICE SCIENCE,28(1),58-68.
MLA	Xu Xun,et al."Genetic and Geographic Patterns of Duplicate DPL Genes Causing Genetic Incompatibility Within Rice: Implications for Multiple Domestication Events in Rice".RICE SCIENCE 28.1(2021):58-68.

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