Mapping of Two Major QTLs Controlling Flowering Time in Brassica napus Using a High-Density Genetic Map

文献类型： 外文期刊

第一作者： Chen, Lei

作者： Chen, Lei;He, Wangfei;Wang, Yifan;Tian, Jie;Gong, Jihui;Cheng, Xinxin;Shu, Yingjie;Lei, Weixia;Fan, Zhixiong;Hao, Bing

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关键词： rapeseed; flowering time; quantitative trait locus; mapping

期刊名称：PLANTS-BASEL （ 影响因子：4.658； 五年影响因子：4.827 ）

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年卷期： 2022 年 11 卷 19 期

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收录情况： SCI

摘要： Research on the flowering habit of rapeseed is important for the selection of varieties adapted to specific ecological environments. Here, quantitative trait loci (QTL) for the days-to-flowering trait were identified using a doubled haploid population of 178 lines derived from a cross between the winter type SGDH284 and the semi-winter type 158A. A linkage map encompassing 3268.01 cM was constructed using 2777 bin markers obtained from next-generation sequencing. The preliminary mapping results revealed 56 QTLs for the days to flowering in the six replicates in the three environments. Twelve consensus QTLs were identified by a QTL meta-analysis, two of which (cqDTF-C02 and cqDTF-C06) were designated as major QTLs. Based on the micro-collinearity of the target regions between B. napus and Arabidopsis, four genes possibly related to flowering time were identified in the cqDTF-C02 interval, and only one gene possibly related to flowering time was identified in the cqDTF-C06 interval. A tightly linked insertion-deletion marker for the cqFT-C02 locus was developed. These findings will aid the breeding of early maturing B. napus varieties.

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