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Transmission of important chromosomal regions under selection revealed in rice pedigree breeding programs

文献类型： 外文期刊

作者： Zhou, Jiangbo 1 ; Zhang, Yuan-Ming 2 ; Lu, Haiyan 2 ; You, Aiqing 3 ; Zhu, Lili 1 ; He, Guangcun 1 ;

作者机构： 1.Wuhan Univ, Coll Life Sci, State Key Lab Hybrid Rice, Wuhan 430072, Peoples R China

2.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement, Sect Stat Genom, Nanjing 210095, Jiangsu, Peoples R China

3.Hubei Acad Agr Sci, Hybrid Rice Res Ctr, Wuhan 430064, Peoples R China

关键词： Pedigree analysis;Founder parent;QTL mapping;Rice

期刊名称：MOLECULAR BREEDING （ 影响因子：2.589； 五年影响因子：2.75 ）

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收录情况： SCI

摘要： Genetic analysis across a whole plant genome based on pedigree information offers considerable potential for enhancing genetic gain from plant breeding programs through quantitative trait loci (QTL) mapping and marker-assisted selection. Here, we report its application for graphically genotyping varieties used in Chinese japonica rice (Oryza sativa L.) pedigree breeding programs. We identified 34 important chromosomal regions from the founder parent that are under selection in the breeding programs, and by comparing donor genomic regions that are under selection with QTL locations of agronomic traits, we found that QTL clustered in important genomic regions, in accordance with association analyses of natural populations and other previous studies. The convergence of genomic regions under selection with QTL locations suggests that donor genomic regions harboring key genes/QTL for important agronomic traits have been selected by plant breeders since the 1950s from the founder rice plants. The results provide better understanding of the effects of selection in breeding programs on the traits of rice cultivars. They also provide potentially valuable information for enhancing rice breeding programs through screening candidate parents for targeted molecular markers, improving crop yield potential and identifying suitable genetic material for use in future breeding programs.

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