Genetic analysis of genetic basis of a physiological disorder "straighthead" in rice (Oryza sativa L.)
文献类型: 外文期刊
第一作者: Li, Xiaobai
作者: Li, Xiaobai;Jia, Limeng;Wu, Dianxing;Yan, Wengui;Jackson, Aaron;Jia, Melissa;Li, Xiaobai;Jia, Limeng;Agrama, Hesham;Moldenhauer, Karen;Correa, Fernando
作者机构:
关键词: Rice;Straighthead;Germplasm;Linkage mapping
期刊名称:GENES & GENOMICS ( 影响因子:1.839; 五年影响因子:1.329 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: Straighthead is a physiological disorder in rice that causes yield losses and is a serious threat to rice production worldwide. Identification of QTL conferring resistance will help develop resistant cultivars for straighthead control. We conducted linkage mapping to identify QTL involved with straighthead. The study was based on a F-2 population developed from a cross between 'Zhe733(resistant)/R312(susceptible)'. Using phenotypic data of F-2 plants and their F-2:3 families, two major QTL, qSTH-2 and qSTH-8, were identified using bulked segregant analysis, explaining 11.1 and 28.1 % of the phenotypic variation on chromosome 2 and 8, respectively. The qSTH-2 for straighthead resistance was identified by linkage mapping. qSTH-2 was situated near a QTL "AsS" responsible for arsenic accumulation. Straighthead is frequently observed on land where As has accumulated. The result suggests a kind of internal connection between qSTH-2 and AsS. Additionally, the QTL qSTH-8 was located close to HD5 related with heading date. The close location may be associated with the observation of early heading among straighthead resistant varieties. These findings should be useful for further genetic study of straighthead.
分类号: Q
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