Evolution of the PEBP gene family and selective signature on FT-like clade

文献类型： 外文期刊

第一作者： Zheng, Xiao-Ming

作者： Zheng, Xiao-Ming;Wu, Fu-Qing;Zhang, Xin;Lin, Qi-Bing;Wang, Jie;Guo, Xiu-Ping;Lei, Cai-Lin;Cheng, Zhi-Jun;Zou, Cheng;Wan, Jian-Min;Wan, Jian-Min

作者机构：

关键词： adaptation;duplication;FT-like genes;flowering time;recent positive selection

期刊名称：JOURNAL OF SYSTEMATICS AND EVOLUTION （ 影响因子：4.098； 五年影响因子：4.735 ）

ISSN： 1674-4918

年卷期： 2016 年 54 卷 5 期

页码：

收录情况： SCI

摘要： The PEBP family of proteins, which encode a phosphatidyl ethanolamine-binding protein (PEBP) domain, serve as a hub in the network of integrating environmental and developmental signals to regulate flowering in all angiosperms. To understand how PEBP duplication genes arose and evolved during plant evolution, we identified 259 genes involved in the PEBP domain from 25 species, including angiosperms, gymnosperms, and embryophytes. We found that plant PEBP genes could be divided into three monophyletic groups, including FT-like, TFL-like and MFT-like subgroups. Based on the phylogeny, FT-like and TFL-like subgroups split before the angiosperm divergence. The likelihood ratio test indicates that the FT-like clade is significantly different in K-a/K-s with TFL-like and MFT-like clades. We found this shift in mutation might be attributed to the positive selection imposed on the fourth exon of recent FT duplications. Divergent expression patterns of FT paralogs indicated that they had undergone subfunctionalization after duplication. In addition, some of the FT-like genes have been targets of selection during domestication in rice and maize, for which the flowering time is an important agronomic trait. These results imply potential recent positive selection on FT-like genes with potential to increase the prevalence of novel functional alleles leading to extensive plant flowering time diversity and adaptation to environmental changes.

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