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题名: Genome-wide identification and comparative expression analysis reveal a rapid expansion and functional divergence of duplicated genes in the WRKY gene family of cabbage, Brassica oleracea var. capitata
作者: Yao, Qiu-Yang1, 2, 3; Xia, En-Hua2, 3; Liu, Fei-Hu1; null(高立志)2
刊名: GENE
关键词: WRKY transcription factor ; Cabbage ; Duplicated gene ; Tissue-specific expression ; Expression divergence
英文摘要: WRKY transcription factors (TFs), one of the ten largest TF families in higher plants, play important roles in regulating plant development and resistance. To date, little is known about the WRKY TF family in Brassica oleracea. Recently, the completed genome sequence of cabbage (B. oleracea var. capitata) allows us to systematically analyze WRKY genes in this species. A total of 148 WRKY genes were characterized and classified into seven subgroups that belong to three major groups. Phylogenetic and synteny analyses revealed that the repertoire of cabbage WRKY genes was derived from a common ancestor shared with Arabidopsis thaliana. The B. oleracea WRKY genes were found to be preferentially retained after the whole-genome triplication (WGT) event in its recent ancestor, suggesting that the WGT event had largely contributed to a rapid expansion of the WRKY gene family in B. oleracea. The analysis of RNA-Seq data from various tissues (i.e., roots, stems, leaves, buds, flowers and siliques) revealed that most of the identified WRKY genes were positively expressed in cabbage, and a large portion of them exhibited patterns of differential and tissue-specific expression, demonstrating that these gene members might play essential roles in plant developmental processes. Comparative analysis of the expression level among duplicated genes showed that gene expression divergence was evidently presented among cabbage WRKY paralogs, indicating functional divergence of these duplicated WRKY genes. (C) 2014 Elsevier B.V. All rights reserved.
出版日期: 2015-02-15
卷号: 557, 期号:1, 页码:35-42
语种: 英语
收录类别: SCI
学科分类: Genetics & Heredity
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/20663
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Yunnan Univ, Lab Plant Breeding & Utilizat, Kunming 650091, Peoples R China
2.Chinese Acad Sci, Plant Germplasm & Genom Ctr, Kunming Inst Bot, Germplasm Bank Wild Species Southwest China, Kunming 650201, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
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