文献类型： 外文期刊
作者： Zheng, Yuanyuan 1 ; Li, Minqi 1 ; Sun, Ping 1 ; Gao, Guanjun 1 ; Zhang, Qinglu 1 ; Li, Yanhua 1 ; Lou, Guangming 1 ; Wu, Bian 1 ; He, Yuqing 1 ;
作者机构： 1.Huazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Hubei Hongshan Lab, Wuhan 430070, Peoples R China
2.Huazhong Agr Univ, Natl Ctr Plant Gene Res Wuhan, Hubei Hongshan Lab, Wuhan 430070, Peoples R China
3.Hubei Acad Agr Sci, Lab Crop Mol Breeding, Minist Agr & Rural Affairs, Food Crops Inst,Hubei Key Lab Food Crop Germplasm, Wuhan 430070, Peoples R China
关键词： Rice; Grain size; Quantitative trait loci; Fine mapping; OsKS2/OsKSL2
期刊名称：MOLECULAR BREEDING （ 影响因子：3.0； 五年影响因子：3.0 ）
ISSN： 1380-3743
年卷期： 2024 年 44 卷 9 期
页码：
收录情况： SCI
摘要： Rice grain size and grain weight, which have a great influence on rice quality and yield, are complex quantitative traits that are mediated by grain length (GL), grain width (GW), length-to-width ratio (LWR), and grain thickness (GT). In this study, the BC1F2 and BC1F2:3 populations derived from a cross between two indica rice varieties, Guangzhan 63-4S (GZ63-4S) and Dodda, were used to locate quantitative trait loci (QTL) related to grain size. A total of 30 QTL associated with GL, GW and LWR were detected, of which six QTL were scanned repeatedly in both populations. Two QTL, qGL4 and qGL6, were selected for genetic effect validation and were subsequently fine mapped to 2.359 kb and 176 kb, respectively. LOC_Os04g52240 (known as OsKS2/OsKSL2), which encoding an ent-beyerene synthase and as the only gene found in 2.359 kb interval, was proposed to be the candidate for qGL4. Moreover, the grains of qGL4 homozygous mutant plants generated by the CRISPR-Cas9 system became shorter and wider. In addition, the qGL4 allele from GZ63-4S contributes to the increase of yield per plant. Our study not only laid the foundation for further functional study of qGL4 and map-based cloning of qGL6, but also provided genetic resources for the development of high yield and good quality rice varieties.
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