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Genetic Dissection and Germplasm Selection of the Low Crude Fiber Component in Brassica napus L. Shoots

文献类型： 外文期刊

作者： Shi, Rui 1 ; Pang, Chengke 1 ; Wu, Xu 2 ; Zhao, Xiaozhen 1 ; Chen, Feng 2 ; Zhang, Wei 2 ; Sun, Chengming 2 ; Fu, Sanxiong 2 ; Hu, Maolong 2 ; Zhang, Jiefu 1 ; Wang, Xiaodong 2 ;

作者机构： 1.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Ind Crops, Minist Agr & Rural Affairs, Key Lab Cotton & Rapeseed, Nanjing 210014, Peoples R China

关键词： Brassica napus; crude fiber; germplasm selection; QTL mapping; shoots

期刊名称：FOODS （ 影响因子：5.2； 五年影响因子：5.5 ）

ISSN：

年卷期： 2023 年 12 卷 2 期

页码：

收录情况： SCI

摘要： Background: Brassica napus is one of the most important oil crops in the world, and B. napus shoots are nutrient-rich fresh vegetables. The crude fiber (CF) component is one of the most important factors affecting the taste quality of B. napus shoots, but the factors underlying the desirable low-CF trait remain poorly understood. Methods: In this study, a high-density single-nucleotide polymorphism (SNP) map was used to map quantitative trait loci (QTLs) for five CF-related traits in a recombinant inbred population. Results: A total of 49 QTLs were obtained in four environments, including eleven, twelve, eight, twelve and six QTLs for content of neutral detergent fiber, acid detergent fiber, acid detergent lignin, hemicellulose and cellulose, respectively. The phenotypic variation explained by single QTL ranged from 4.62% to 14.76%. Eight of these QTLs were further integrated into four unique QTLs, which controlled two different traits simultaneously. Five CF-component-related candidate genes were identified, among which BnaC03g07110D and BnaC07g21271D were considered to be the most likely candidate genes. In addition, five lines with low CF content were selected, which can be used as excellent germplasm resources in breeding. Conclusions: The QTLs identified in this study will contribute to our understanding of the genetic mechanism of CF and can be used as targets for reducing CF content in B. napus shoots. In addition, this study also provided excellent germplasm resources for low CF content breeding.

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