数字农科院2.0

Genetic Analysis And Qtl Mapping Of A Novel Reduced Height Gene In Common Wheat (Triticum Aestivum L.)

文献类型： 外文期刊

作者： Zhou, CY; Xiong, HC; Li, YT; Guo, HJ; Xie, YD; Zhao, LS; Gu, JY; Zhao, SR; Ding, YP; Song, XY; Liu, LX

作者机构：

关键词： Reduced Height Gene; Wheat; Qtl; Bsa; Molecular Marker

期刊名称： JOURNAL OF INTEGRATIVE AGRICULTURE

ISSN： 2095-3119

年卷期： 2020 年 19 卷 7 期

页码：

收录情况： JCR（2021版） ; CSCD（2020-2021年度） ; 农林核心（2020版） ; 科技核心（2020版）

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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