Development and Characterization of Chromosome Segment Substitution Lines Derived from Oryza rufipogon in the Background of the Oryza sativa indica Restorer Line R974
文献类型： 外文期刊
作者： Ding, Gumu 1 ; Hu, Biaolin 2 ; Zhou, Yi 1 ; Yang, Wanling 3 ; Zhao, Minmin 1 ; Xie, Jiankun 3 ; Zhang, Fantao 1 ;
作者机构： 1.Jiangxi Normal Univ, Coll Life Sci, Nanchang 330022, Jiangxi, Peoples R China
2.Jiangxi Acad Agr Sci, Rice Res Inst, Rice Natl Engn Lab, Nanchang 330022, Jiangxi, Peoples R China
3.Jiangxi Prov Key Lab Protect & Utilizat Subtrop P, Nanchang 330022, Jiangxi, Peoples R China
关键词： wild rice; chromosome segment substitution line; germplasm resource; salt stress tolerance; restorer line
期刊名称：GENES （ 影响因子：4.141； 五年影响因子：4.474 ）
ISSN：
年卷期： 2022 年 13 卷 5 期
页码：
收录情况： SCI
摘要： Dongxiang wild rice (DXWR) (O. rufipogon Griff.), which has the northernmost worldwide distribution of a wild rice species, is a valuable genetic resource with respect to improving stress tolerance in cultivated rice (Oryza sativa L.). In the three-line hybrid rice breeding system, restorer lines play important roles in enhancing the tolerance of hybrid rice. However, restorer lines have yet to be used as a genomic background for development of substitution lines carrying DXWR chromosome segments. We developed a set of 84 chromosome segment substitution lines (CSSLs) from a donor parent DXWR x recurrent parent restorer line R974 (Oryza sativa indica) cross. On average, each CSSL carried 6.27 introgressed homozygous segments, with 93.37% total genome coverage. Using these CSSLs, we identified a single QTL, qDYST-1, associated with salt stress tolerance on chromosome 3. Furthermore, five CSSLs showing strong salt stress tolerance were subjected to whole-genome single-nucleotide polymorphism chip analyses, during which we detected a common substitution segment containing qDYST-1 in all five CSSLs, thereby implying the validity and efficacy of qDYST-1. These novel CSSLs could make a significant contribution to detecting valuable DXWR QTLs, and provide important germplasm resources for breeding novel restorer lines for use in hybrid rice breeding systems.
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