Detection and validation of QTLs associated with seed longevity in rice (Oryza sativa L.)

文献类型： 外文期刊

第一作者： Pan, Xiaowu

作者： Pan, Xiaowu;Li, Yongchao;Duan, Yonghong;Min, Jun;Liu, Sanxiong;Shen, Xinnian;Li, Xiaoxiang;Liu, Wenqiang;Pan, Xiaowu;Li, Yongchao;Duan, Yonghong;Min, Jun;Liu, Sanxiong;Shen, Xinnian;Li, Xiaoxiang

作者机构：

关键词： quantitative trait locus (QTL); recombinant inbred line (RIL); seed longevity

期刊名称：PLANT BREEDING （ 影响因子：1.832； 五年影响因子：1.956 ）

ISSN： 0179-9541

年卷期： 2018 年 137 卷 4 期

页码：

收录情况： SCI

摘要： Seed longevity in rice is a major determinant in seed production and germplasm preservation. In this paper, a recombinant inbred line (RIL) population consisting of 172 lines derived from the cross between Xiang743 and Katy' was used to map quantitative trait loci (QTLs) for seed longevity (SL) after seed storage for 18 and 30months under ambient conditions. Two putative QTLs, qSL-2 and qSL-8, were detected and located on chromosomes 2 and 8, respectively. qSL-2 is an allele from Xiang743 allele and increases seed longevity. qSL-8 was a novel QTL from Katy' allele and increases seed longevity. qSL-8 explained 15.29% and 17.35% of the phenotypic variance after seed storage for 18 and 30months, respectively. Furthermore, qSL-8 was validated in a secondary population developed by self-pollination of a residual heterozygous line (RHL) selected from the RIL population, which explained 25.93% of the phenotypic contribution. These results provide an opportunity for map-based cloning of qSL-8. Furthermore, qSL-8 may be a target for improving seed longevity by marker-assisted selection (MAS) in rice.

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