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Development of introgression lines and mapping of qGW2, a novel QTL that confers grain width, in rice (Oryza sativa L.)

文献类型： 外文期刊

作者： Zhao, Xiangqiang 1 ; Xu, Zuopeng 2 ; Chen, Yibo 4 ; Du, Yuanyue 2 ; Li, Meng 2 ; Huang, Benxi 2 ; Ge, Yongshen 2 ; Gu, Minghong 2 ; Tang, Shuzhu 2 ; Liu, Qiaoquan 2 ; Zhang, Honggen 2 ;

作者机构： 1.Nantong Univ, Sch Life Sci, Nantong 226019, Jiangsu, Peoples R China

2.Yangzhou Univ, Jiangsu Key Lab Crop Genom & Mol Breeding, Zhongshan Biol Breeding Lab, Key Lab Plant Funct Genom,Minist Educ,Agr Coll, Yangzhou 225009, Peoples R China

3.Yangzhou Univ, Jiangsu Co Innovat Ctr Modern Prod Technol Grain C, Jiangsu Key Lab Crop Genet & Physiol, Yangzhou 225009, Peoples R China

4.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou 510640, Guangdong, Peoples R China

关键词： Rice (Oryza sativa L.); Introgression lines; Yield; Quantitative trait loci; Mapping

期刊名称：MOLECULAR BREEDING （ 影响因子：3.1； 五年影响因子：3.1 ）

ISSN： 1380-3743

年卷期： 2024 年 44 卷 2 期

页码：

收录情况： SCI

摘要： Rice grain size is a key determinant of both grain yield and quality. Identification of favorable alleles for use in rice breeding may help to meet the demand for increased yield. In this study, we developed a set of 210 introgression lines (ILs) by using indica variety Huanghuazhan as the donor parent and erect-panicle japonica rice variety Wuyujing3R as the recurrent parent. A total of 133 ILs were selected for high-throughput sequencing. Using specific-locus amplified fragment (SLAF) sequencing technology, 10,103 high-quality SLAF labels evenly distributed on 12 chromosomes were obtained and selected for subsequent analysis. Using a high-density map, quantitative trait locus (QTL) mapping of grain size-related traits was performed, and a total of 38 QTLs were obtained in two environments. Furthermore, qGW2, a novel QTL that controls grain width on chromosome 2, was validated and delimited to a region of 309 kb via substitution mapping. These findings provide new genetic material and a basis for future fine mapping and cloning of favorable QTLs.

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