QTL ANALYSIS FOR RICE SEEDLINGS UNDER NITROGEN DEFICIENCY USING CHROMOSOMAL SEGMENT SUBSTITUTION LINES

文献类型： 外文期刊

第一作者： Anis, Galal

作者： Anis, Galal;Zhang, Yingxin;Wu, Weixun;Rahman, Md Habibur;Riaz, Aamir;Chen, Daibo;Shen, Xihong;Zhan, Xiaodeng;Cao, Liyong;Cheng, Shihua;Anis, Galal;Zhang, Yingxin;Fiaz, Sajid;Rahman, Md Habibur;Riaz, Aamir;Chen, Daibo;Shen, Xihong;Zhan, Xiaodeng;Cao, Liyong;Cheng, Shihua;Xu, Xiaoming;Anis, Galal

作者机构：

关键词： Nitrogen; Quantitative trait loci; Rice; Root traits

期刊名称：PAKISTAN JOURNAL OF BOTANY （ 影响因子：0.972； 五年影响因子：0.988 ）

ISSN： 0556-3321

年卷期： 2018 年 50 卷 2 期

页码：

收录情况： SCI

摘要： A population of Chromosomal Segment Substitution Lines (CSSLs) derived from an Indica nitrogen deficiency tolerant Xieqingzao B (XQZB) and an Indica nitrogen deficiency susceptible Zhonghui9308 (ZH9308) was studied. A genetic linkage map was constructed by employing 87 SSR and 33 In Del markers to analyze quantitative trait loci (QTLs) at seedling stage in rice under normal (NN), low (LN) and relative nitrogen (LN/NN) levels. A sum of 9 QTLs was detected in 6 regions on 6 chromosomes, with each QTL explaining 10.58%-27.27% of phenotypic variation. The QTLs controlling shoot dry weight and total dry weight were simultaneously located at RM24718 interval on chromosome 9 under low N conditions. QTLs responsible for root dry weight under LN situations were detected near the marker InD90 on chromosome 6, which explained 16.84% of the phenotypic variation and had a high value for its additive effect (6.14). For future genetic improvement programs, the root dry weight attribute is considered distinctly, which helps to improve, N-deficiency tolerance. This study also providesinsights into fine mapping, gene cloning, and marker assisted selection for future research.

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