DFN EH7DFN Association Analysis of Arsenic-Induced Straighthead in Rice (Oryza sativa L.) Based on the Selected Population with a Modified Model
文献类型： 外文期刊
作者：
Li, Xiaobai
1
;
Hu, Biaolin
3
;
Pan, Xuhao
4
;
Zhang, Ning
1
;
Wu, Dianxing
1
;
作者机构： 1.Zhejiang Univ, IAEA Collaborating Ctr, State Key Lab Rice Biol, Hangzhou, Zhejiang, Peoples R China
2.Zhejiang Acad Agr Sci, Hangzhou, Zhejiang, Peoples R China
3.Jiangxi Acad Agr Sci & Nanchang, Natl Sub Ctr Rice Improvement, Rice Res Inst, Nanchang, Jiangxi, Peoples R China
4.Chinese Acad Agr Sci, Inst Tobacco Res, Qingzhou, Shandong, Peoples R China
期刊名称：BIOMED RESEARCH INTERNATIONAL （ 影响因子：3.411； 五年影响因子：3.62 ）
ISSN： 2314-6133
年卷期： 2017 年
页码：
收录情况： SCI
摘要： A rice physiological disorder makes mature panicle keep erect with empty grains termed as "straighthead." Straighthead causes yield losses and is a serious threat to rice production worldwide. Here, a new study of association mapping was conducted to identify QTL involved in straighthead. A subset of 380 accessions was selected from the USDA rice core collection and genotyped with 72 genome-wide SSR markers. An optimal model implemented with principle components (PCs) was used in this association mapping. As a result, five markers were identified to be significantly associated with straighthead. Three of them, RM263, RM169, and RM224, were consistent with a previous study. Three markers, RM475, RM263, and RM19, had a resistant allele associated with a decrease in straighthead rating (straighthead rating <= 4.8). In contrast, the two other marker loci RM169 and RM224 had a few susceptible alleles associated with an increase in straighthead rating (straighthead rating >= 8.7). Interestingly, RM475 is close to QTL "qSH-2" and "AsS" with straighthead resistance, which was reported in two studies on linkage mapping of straighthead. This finding adds to previous work and is useful for further genetic study of straighthead.
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