文献类型： 外文期刊
作者： Wang, Zhou-fei 1 ; Wang, Jian-fei 1 ; Bao, Yong-mei 1 ; Wang, Fu-hua 1 ; Zhang, Hong-sheng 1 ;
作者机构： 1.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China
2.Henan Acad Agr Sci, Inst Crop Sci, Zhengzhou 450002, Peoples R China
关键词： Rice;Recombinant inbred line (RIL) population;Seed vigor;Quantitative trait locus (QTL);Germination
期刊名称：JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE B （ 影响因子：3.066； 五年影响因子：3.057 ）
ISSN： 1673-1581
年卷期： 2010 年 11 卷 12 期
页码：
收录情况： SCI
摘要： Seed vigor is an important characteristic of seed quality, and rice cultivars with strong seed vigor are desirable in direct-sowing rice production for optimum stand establishment. In the present study, the quantitative trait loci (QTLs) of three traits for rice seed vigor during the germination stage, including germination rate, final germination percentage, and germination index, were investigated using one recombinant inbred line (RIL) population derived from a cross between japonica Daguandao and indica IR28, and using the multiple interval mapping (MIM) approach. The results show that indica rice presented stronger seed vigor during the germination stage than japonica rice. A total of ten QTLs, and at least five novel alleles, were detected to control rice seed vigor, and the amount of variation (R (2)) explained by an individual QTL ranged from 7.5% to 68.5%, with three major QTLs with R (2)> 20%. Most of the QTLs detected here are likely to coincide with QTLs for seed weight, seed size, or seed dormancy, suggesting that the rice seed vigor might be correlated with seed weight, seed size, and seed dormancy. At least five QTLs are novel alleles with no previous reports of seed vigor genes in rice, and those major or minor QTLs could be used to significantly improve the seed vigor by marker-assisted selection (MAS) in rice.
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