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Genomic analysis of Dof transcription factors in Hevea brasiliensis, a rubber-producing tree

文献类型： 外文期刊

作者： Zou, Zhi 1 ; Yang, Jianghua 2 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Minist Agr & Rural Affairs, Key Lab Biol & Genet Resources Trop Crops, Haikou 571101, Hainan, Peoples R China

2.Chinese Acad Trop Agr Sci, Rubber Res Inst, Haikou 571101, Hainan, Peoples R China

关键词： Dof transcription factor; Gene expansion; Evolution; Orthologous group; Phylogenetic analysis; Whole-genome duplication

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：5.645； 五年影响因子：5.749 ）

ISSN： 0926-6690

年卷期： 2019 年 134 卷

页码：

收录情况： SCI

摘要： Dof transcription factors comprise a plant-specific family that plays diverse roles in gene regulation of many plant processes. Despite the importance of this family, little information is available in rubber (Hevea brasiliensis), a natural rubber-producing tree of the Euphorbiaceae family. This study presents the first genome-wide analysis of Dof family genes in rubber. The family number of 46 in rubber is comparable to 45 in cassava (Manihot esculenta) and almost twice as 24 in castor (Ricinus communis), another two Euphorbiaceous plants. In contrast to no recent duplicate present in castor, 22 duplicated HbDofs were identified and they were all shown to result from the so-called rho whole-genome duplication (WGD). Despite sharing this recent WGD, comparison revealed species-specific gene loss between rubber and cassava. According to phylogenetic analysis, these genes were divided into nine groups, and 24 orthologous groups (OGs) were also proposed based on comparison of rubber, cassava, castor, arabidopsis, and rice Dofs. Tissue-specific expression profiles of HbDofs were further investigated, supporting expression divergence of HbDof duplicates. Moreover, HbDofs associated with leaf development, ethylene response, and tapping panel dryness were also identified. Results obtained from this study provide valuable information for further studies of Dof genes in rubber and other species.

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