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Genetic characterization and fine mapping of a recessive genic male-sterile gene in flowering Chinese cabbage (Brassica rapa var. parachinensis)

文献类型： 外文期刊

作者： Wu, Zengxiang 1 ; Yang, Yi 1 ; Li, Tingyao 1 ; Shen, Zhuo 1 ; Zhou, Xuan 1 ; Zhang, Yan 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Vegetable Res Inst, Guangdong Key Lab New Technol Res Vegetables, Guangzhou 510640, Guangdong, Peoples R China

2.Guangdong Lab Lingnan Modern Agr, Guangzhou 510640, Guangdong, Peoples R China

关键词： Flowering Chinese cabbage; Genic male sterility; Structural variation; Bnams4(b)

期刊名称：3 BIOTECH （ 影响因子：2.8； 五年影响因子：3.1 ）

ISSN： 2190-572X

年卷期： 2024 年 14 卷 6 期

页码：

收录情况： SCI

摘要： Brassica vegetables exhibit pronounced heterosis; nevertheless, investigations on fertility-related genes are scarce. The present study scrutinized a recessive genic male-sterile line, 7-3A, capable of generating a completely sterile population, holding significant promise for flowering Chinese cabbage breeding. By whole-genome resequencing of sterile and fertile plants, the male-sterile gene was confined to approximately 185 kb on chromosome A07, situated between markers C719 and NP10 in Brassica rapa var. Chiifu-401. Notably, substantial structural variation was identified within this region across diverse Brassica rapa reference genomes. Despite discernible expression level disparities of a homologous gene, Bnams4(b), between male sterile and fertile plants, no sequence divergence was detected. Further elucidation is required to pinpoint a novel sterile gene within the candidate interval. This investigation contributes to the advancement of both the molecular-assisted breeding scheme for flowering Chinese cabbage and the comprehension of male sterility mechanisms.

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