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Genome-wide identification of R2R3-MYB gene family and association with anthocyanin biosynthesis in Brassica species

文献类型： 外文期刊

作者： Chen, Daozong 1 ; Chen, Haidong 1 ; Dai, Guoqiang 1 ; Zhang, Haimei 1 ; Liu, Yi 1 ; Shen, Wenjie 1 ; Zhu, Bo 1 ; Cui, Cheng 2 ; Tan, Chen 1 ;

作者机构： 1.Gannan Normal Univ, Coll Life Sci, Ganzhou Key Lab Greenhouse Vegetable, Ganzhou 341000, Peoples R China

2.Sichuan Acad Agr Sci, Crop Res Inst, Chengdu 610066, Peoples R China

关键词： Brassica species; Subgenome; Anthocyanin biosynthesis; Co-expression

期刊名称：BMC GENOMICS （ 影响因子：4.547； 五年影响因子：4.931 ）

ISSN： 1471-2164

年卷期： 2022 年 23 卷 1 期

页码：

收录情况： SCI

摘要： Brassica species include important oil crops and vegetables in the world. The R2R3-MYB gene participates in a variety of plant functions, including the activation or inhibition of anthocyanin biosynthesis. Although previous studies have reported its phylogenetic relationships, gene structures, and expression patterns in Arabidopsis, the number and sequence variation of this gene family in Brassica crops and its involvement in the natural quantitative variation in anthocyanin biosynthesis regulation are still largely unknown. In this study, by using whole genome sequences and comprehensive genome-wide comparative analysis among the six cultivated Brassica species, 2120 R2R3-MYB genes were identified in six Brassica species, in total These R2R3-MYB genes were phylogenetically clustered into 12 groups. The R2R3-MYB family between A and C subgenomes showed better collinearity than between B and C and between A and B. From comparing transcriptional changes of five Brassica species with the purple and green leaves for the detection of the R2R3-MYB genes associated with anthocyanin biosynthesis, 7 R2R3-MYB genes were co-differentially expressed. The promoter and structure analysis of these genes showed that some variations between non-coding region, but they were highly conserved at the protein level and spatial structure. Co-expression analysis of anthocyanin-related genes and R2R3-MYBs indicated that MYB90 was strongly co-expressed with TT8, and they were co-expressed with structural genes F3H, LDOX, ANS and UF3GT at the same time. These results further clarified the roles of the R2R3-MYBs for leaf coloration in Brasica species, which provided new insights into the functions of the R2R3-MYB gene family in Brasica species.

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