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Genetic diversity and structure of indica rice varieties from two heterotic pools of southern China and IRRI

文献类型： 外文期刊

作者： Xie, Fangming 1 ; Guo, Longbiao 2 ; Ren, Guangjun 3 ; Hu, Peisong 2 ; Wang, Feng 4 ; Xu, Jianlong 5 ; Li, Xinqi 6 ; Qiu, 1 ;

作者机构： 1.Int Rice Res Inst, Manila, Philippines

2.China Natl Rice Res Inst, Hangzhou 310006, Zhejiang, Peoples R China

3.Sichuan Acad Agr Sci, Chengdu 610066, Peoples R China

4.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou 510640, Guangdong, Peoples R China

5.Chinese Acad Agr Sci, Crop Sci Inst, Beijing 100081, Peoples R China

6.China Natl Hybrid Rice Res & Dev Ctr, Changsha 410125, Hunan, Peoples R China

期刊名称：PLANT GENETIC RESOURCES-CHARACTERIZATION AND UTILIZATION （ 影响因子：1.08； 五年影响因子：1.243 ）

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收录情况： SCI

摘要： Investigation of genetic diversity and the relationships among varieties and breeding lines is of great importance to facilitate parental selection in the development of inbred and hybrid rice varieties and in the construction of heterotic groups. The technology of single nucleotide polymorphism (SNP) is being advanced for the assessment of population diversity and genetic structures. We characterized 215 widely cultivated indica rice varieties developed in southern China and at the International Rice Research Institute (IRRI) using IRRI-developed SNP oligonucleotide pooled assay (OPA) to provide grouping information of rice mega-varieties for further heterotic pool study. The results revealed that the Chinese varieties were more divergent than the IRRI varieties. Two major subpopulations were clustered for the varieties using a model-based grouping method. The IRRI varieties were closely grouped and separated clearly from the majority of the Chinese varieties. The Chinese varieties were subclustered into three subgroups, but there was no clear evidence to separate the Chinese varieties into subgroups geographically, indicating a great degree of genetic integration of alleles and shared ancestries among those high-yielding modern varieties.

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