Mapping of a major QTL controlling plant height using a high-density genetic map and QTL-seq methods based on whole-genome resequencing in Brassica napus

文献类型： 外文期刊

第一作者： Dong, Zhixue

作者： Dong, Zhixue;Alam, Muhammad Khorshed;Xie, Meili;Yang, Li;Liu, Jie;Helal, M. M. U.;Huang, Junyan;Cheng, Xiaohui;Liu, Yueying;Tong, Chaobo;Zhao, Chuanji;Liu, Shengyi;Dong, Zhixue;Liu, Jie;Yang, Li

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关键词： Brassica napus; plant height; QTL-seq; high-density genetic map; QTL mapping; RNA sequencing

期刊名称：G3-GENES GENOMES GENETICS （ 影响因子：3.542； 五年影响因子：3.545 ）

ISSN： 2160-1836

年卷期： 2021 年 11 卷 7 期

页码：

收录情况： SCI

摘要： Plant height is a crucial element related to plant architecture that influences the seed yield of oilseed rape (Brassica napus L.). In this study, we isolated a natural B. napus mutant, namely a semi-dwarf mutant (sdw-e), which exhibits a 30% reduction in plant height compared with Zhongshuang 11-HP (ZS11-HP). Quantitative trait locus sequencing (QTL-seq) was conducted using two extreme DNA bulks in F-2 populations in Wuchang-2017 derived from ZS1 1-HP x sdw-e to identify QTLs associated with plant height. The result suggested that two QTL intervals were located on chromosome A10. The F-2 population consisting of 200 individuals in Yangluo-2018 derived from ZS11-HP x sdw-e was used to construct a high-density linkage map using whole-genome resequencing. The high-density linkage map harbored 4323 bin markers and covered a total distance of 2026.52 cM with an average marker interval of 0.47 cM. The major QTL for plant height named qPHA10 was identified on linkage group A10 by interval mapping and composite interval mapping methods. The major QTL qPHA10 was highly consistent with the QTL-seq results. And then, we integrated the variation sites and expression levels of genes in the major QTL interval to predict the candidate genes. Thus, the identified QTL and candidate genes could be used in marker-assisted selection for B. napus breeding in the future.

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