文献类型： 外文期刊

作者： Gao, F. Y. ² ; Ren, G. J. ² ; Lu, X. J. ² ; Sun, S. X. ² ; Li, H. J. ² ; Gao, Y. M. ³ ; Luo, H. ⁴ ; Yan, W. G. ⁵ ; Zhang, Y. ¹ ;

作者机构： 1.Sichuan Univ, Life Sci Coll, Chengdu 610041, Peoples R China

2.Sichuan Acad Agr Sci, Crops Res Inst, Chengdu 610066, Peoples R China

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

4.Clemson Univ, Dept Genet & Biochem, Clemson, SC 29634 USA

5.USDA ARS, Dale Bumpers Natl Rice Res Ctr, Stuttgart, AR 72160 USA

关键词： Oryza sativa;quantitative trait loci;linkage disequilibrium

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

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收录情况： SCI

摘要： Preharvest sprouting (PHS) is caused by early breaking of seed dormancy. In Sichuan, a major hybrid rice seed production area of China, PHS in hybrid seeds originated from 'G46A' parent may lead to severe yield loss, causing serious damage to agricultural production. To detect quantitative trait loci (QTLs) governing PHS, we developed an F population of 164 plants derived from 'G46B' and 'K81', a near-isogenic introgression line of G46B, with high level of resistance to PHS. PHS was evaluated under controlled field and laboratory conditions. Using simple sequence repeat markers, we constructed a linkage map from this population and identified three QTLs for PHS, namely qPSR2, qPSR5 and qPSR8, which were located on chromosomes 2, 5 and 8, respectively. Among these QTLs, qPSR8, residing in the interval between RM447 and RM3754 on chromosome 8, was the major QTL controlling PHS, for it had a relative high logarithm of the odds (LOD) score and explained 43.04% of the phenotypic variation. These results were correspondent to those identified in extreme low germination rate plants (ELGP) using linkage and linkage disequilibrium. At all loci, 'K81' was responsible for enhancing the resistance to PHS.