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Genetic diversity and structure of elite cotton germplasm (Gossypium hirsutum L.) using genome-wide SNP data

文献类型： 外文期刊

作者： Ai, XianTao 1 ; Liang, Yajun 2 ; Wang, JunDuo 2 ; Zheng, Juyun 2 ; Gong, ZhaoLong 2 ; Guo, JiangPing 2 ; Li, XueYuan 2 ;

作者机构： 1.Xinjiang Agr Univ, Coll Agron, Nanchang Rd 42, Urumqi, Xinjiang, Peoples R China

2.Xinjiang Acad Agr Sci, Inst Econ Crops, Urumqi, Xinjiang, Peoples R China

关键词： Genetic diversity;Population structure;Molecular variance;Genome wide SNP markers;Gossypium hirsutum L

期刊名称：GENETICA （ 2020影响因子：1.082； 五年影响因子：1.489 ）

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收录情况： SCI

摘要： Cotton (Gossypium spp.) is the most important natural textile fiber crop, and Gossypium hirsutum L. is responsible for 90% of the annual cotton crop in the world. Information on cotton genetic diversity and population structure is essential for new breeding lines. In this study, we analyzed population structure and genetic diversity of 288 elite Gossypium hirsutum cultivar accessions collected from around the world, and especially from China, using genome-wide single nucleotide polymorphisms (SNP) markers. The average polymorphsim information content (PIC) was 0.25, indicating a relatively low degree of genetic diversity. Population structure analysis revealed extensive admixture and identified three subgroups. Phylogenetic analysis supported the subgroups identified by STRUCTURE. The results from both population structure and phylogenetic analysis were, for the most part, in agreement with pedigree information. Analysis of molecular variance revealed a larger amount of variation was due to diversity within the groups. Establishment of genetic diversity and population structure from this study could be useful for genetic and genomic analysis and systematic utilization of the standing genetic variation in upland cotton.

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