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Inheritance and Genetic Mapping of Late-Bolting to Early-Bolting Gene, BrEb-1, in Chinese Cabbage (Brassica rapa L.)

文献类型： 外文期刊

作者： Wei, Xiaochun 1 ; Rahim, Md Abdur 2 ; Zhao, Yanyan 1 ; Yang, Shuangjuan 1 ; Su, Henan 1 ; Wang, Zhiyong 1 ; Shahriar, Saleh Ahmed 3 ; Li, Jundang 1 ; Yang, Zhiyuan 4 ; Yuan, Yuxiang 1 ; Zhang, Xiaowei 1 ;

作者机构： 1.Henan Acad Agr Sci, Inst Hort, Zhengzhou 450002, Peoples R China

2.Sher E Bangla Agr Univ, Dept Genet & Plant Breeding, Dhaka 1207, Bangladesh

3.Univ Sains Malaysia, Sch Biol Sci, George Town 11800, Malaysia

4.Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

关键词： bulk segregant analysis; whole-genome re-sequencing; SNP; InDel; bolting; Chinese cabbage

期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）

ISSN：

年卷期： 2022 年 12 卷 5 期

页码：

收录情况： SCI

摘要： Chinese cabbage (Brassica rapa L.) is one of the most important and highly nutritious vegetables in China belonging to the Brassicaceae family. Flowering or bolting is one of the most critical developmental stages in flowering plants. For the spring-sown Chinese cabbage, late-bolting is desirable over early-bolting according to consumer preferences. We determined the inheritance pattern of the late-bolting trait using F-1 and F-2 generated from a cross between 'SY2004' (late-bolting) and 'CX14-1' (early-bolting). The genetic analysis revealed that the late-bolting to early-bolting trait was controlled by an incomplete dominant gene that we named BrLb-1. Furthermore, we performed bulked segregant analysis (BSA) via whole genome re-sequencing and the results showed that this gene was harbored on the chromosome A07 at the intersections of 20,070,000 to 25,290,000 bp and 20,330,000 to 25,220,000, an interval distance of 4.89 Mb. In this candidate interval, totals of 2321 and 1526 SNPs with non-synonymous mutations, and 229 and 131 InDels with frameshift mutations, were found between the parents and the bulked pools, respectively. Furthermore, we identified three putative candidate genes for the late-bolting trait, including BraA07g029500, BraA07g029530 and BraA07g030360, which code for the AGAMOUS-like MADS-box protein AGL12, a pentatricopeptide repeat-containing protein and NAC transcription factor 29, respectively; however, further functional analysis is required. These genetic variants could be utilized for the further development of molecular markers for marker-assisted breeding in Chinese cabbage.

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