文献类型： 外文期刊

第一作者： Zhou Chun-yun

作者： Zhou Chun-yun;Song Xi-yun;Zhou Chun-yun;Xiong Hong-chun;Li Yu-ting;Guo Hui-jun;Xie Yong-dun;Zhao Lin-shu;Gu Jia-yu;Zhao Shi-rong;Ding Yu-ping;Liu Lu-xiang

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关键词： reduced height gene; wheat; QTL; BSA; molecular marker

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2020 年 19 卷 7 期

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收录情况： SCI

摘要： Low stature in wheat is closely associated with lodging resistance, and this impacts harvest index and grain yield. The discovery of novel dwarfing or semi-dwarfing genes can have great significance for dwarf wheat breeding. In this study, we identified an EMS-induced dwarf wheat mutant JE0124 from the elite cultivar Jing411. JE0124 possesses increased stem strength and a 33% reduction in plant height compared with wild type. Gibberellic acid (GA) treatment analysis suggested that JE0124 was GA-sensitive. Analysis of the frequency distribution of plant height in four F-2 populations derived from crosses between JE0124 and the relatively taller varieties Nongda 5181 and WT indicated that the dwarfism phenotype was quantitatively inherited. We used two F-2 populations and 312 individuals from the reciprocal cross of Nongda 5181 and JE0124 to map the quantitative trait locus (QTL) for reduced height to a 0.85-cM interval on chromosome 2DL. The mapping was done by using a combination of 660K SNP array-based bulked segregant analysis (BSA) and genetic linkage analysis, with logarithm of odds (LOD) scores of 5.34 and 5.78, respectively. Additionally, this QTL accounted for 8.27-8.52% of the variation in the phenotype. The dwarf mutant JE0124 and the newly discovered dwarfing gene on chromosome 2DL in this study will enrich genetic resources for dwarf wheat breathing.

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