文献类型： 外文期刊

第一作者： Huang Yi-le

作者： Huang Yi-le;Hu Jian-bin;Huang Yi-le;Zhang Ling-kui;Zhang Kang;Chen Shu-min;Cheng Feng

作者机构：

关键词： tandem duplication; whole genome duplication; Solanaceae species; gene retention; gene fusion

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.384； 五年影响因子：4.021 ）

ISSN： 2095-3119

年卷期： 2022 年 21 卷 4 期

页码：

收录情况： SCI

摘要： Whole genome duplication (WGD) and tandem duplication (TD) are important modes of gene amplification and functional innovation, and they are common in plant genome evolution. We analyzed the genomes of three Solanaceae species (Solanum lycopersicum, Capsicum annuum, and Petunia inflata), which share a common distant ancestor with Vitis vinifera, Theobroma cacao, and Coffea canephora but have undergone an extra whole genome triplication (WGT) event. The analysis was used to investigate the phenomenon of tandem gene evolution with (S. lycopersicum) or without WGT (V. vinifera). Among the tandem gene arrays in these genomes, we found that V. vinifera, which has not experienced the WGT event, retained relatively more and larger tandem duplicated gene (TDG) clusters than the Solanaceae species that experienced the WGT event. Larger TDG clusters tend to be derived from older TD events, so this indicates that continuous TDGs (absolute dosage) accumulated during long-term evolution. In addition, WGD and TD show a significant bias in the functional categories of the genes retained. WGD tends to retain dose-sensitive genes related to biological processes, including DNA-binding and transcription factor activity, while TD tends to retain genes involved in stress resistance. WGD and TD also provide more possibilities for gene functional innovation through gene fusion and fission. The TDG cluster containing the tomato fusarium wilt resistance gene I3 contains 15 genes, and one of these genes, Solyc07g055560, has undergone a fusion event after the duplication events. These data provide evidence that helps explain the new functionalization of TDGs in adapting to environmental changes.

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