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Rapid identification of yellow-flowered gene Bofc in cauliflower (Brassica oleracea var. botrytis) by bulked segregant analysis and whole-genome resequencing

文献类型： 外文期刊

作者： Yan, Chenghuan 1 ; Huang, Yan 1 ; Liu, Zhixiong 1 ; Guo, Fengling 1 ; Jiao, Zhenbiao 1 ; Yang, Wenjie 2 ; Zhu, Fengjua 1 ;

作者机构： 1.Hubei Acad Agr Sci, Inst Econ Crops, Hubei Key Lab Vegetable Germplasm Enhancement & G, Wuhan 430064, Peoples R China

2.Huazhong Agr Univ, Coll Hort & Forestry Sci, Minist Educ, Key Lab Hort Plant Biol, Wuhan 430070, Peoples R China

关键词： Cauliflower; Flower color; Map-based cloning; Carotenoid; Carotenoid cleavage dioxygenase 4

期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）

ISSN： 0014-2336

年卷期： 2020 年 216 卷 2 期

页码：

收录情况： SCI

摘要： The accumulation of carotenoids is related to pigment formation in flowers and other organs. In order to elucidate the genetic variation of flower color in cauliflower, a F-2 segregating population was obtained from yellow-flowered cauliflower 'QGS' and white-flowered Chinese kale 'JYJ'. Bulked segregant analysis combined with the whole-genome resequencing was employed to locate the target region for Flower Color. In this study, Bofc was anchored on chromosome C03 with a single peak, and further mapped to 164 kb interval with 0.28 cM genetic distance. BoCCD4, encoding carotenoid cleavage dioxygenase 4 in the carotenoid metabolic pathway, was selected as the most likely candidate gene. Sequence analysis revealed that an insertion of a 10,608 bp CACTA-like transposon in the coding region led to the loss-of-function of the BoCCD4 gene in cauliflower. These results will provide further understanding of the genetic mechanism controlling flower color in Brassica oleracea species.

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