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Genomes of 12 fig wasps provide insights into the adaptation of pollinators to fig syconia

文献类型： 外文期刊

作者： Xiao, Jinhua 1 ; Wei, Xianqin 1 ; Zhou, Yi 1 ; Xin, Zhaozhe 1 ; Miao, Yunheng 2 ; Hou, Hongxia 1 ; Li, Jiaxing 1 ; Zhao, 1 ;

作者机构： 1.Nankai Univ, Coll Life Sci, Inst Entomol, Tianjin 300071, Peoples R China

2.Chinese Acad Sci, Inst Zool, Beijing 100101, Peoples R China

3.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Hainan, Peoples R China

4.Beibu Gulf Univ, Coll Marine Sci, Guangxi Key Lab Beibu Gulf Marine Biodivers Conse, Qinzhou 535011, Peoples R China

5.Chinese Acad Sci, Inst Biophys, Beijing 100101, Peoples R China

6.Berry Genom Corp, Beijing 102206, Peoples R China

关键词： Phylogenetics; Natural selection; Immunity; Chemosensory; Adaptive evolution

期刊名称：JOURNAL OF GENETICS AND GENOMICS （ 影响因子：4.275； 五年影响因子：5.223 ）

ISSN： 1673-8527

年卷期： 2021 年 48 卷 3 期

页码：

收录情况： SCI

摘要： Figs and fig pollinators are one of the few classic textbook examples of obligate pollination mutualism. The specific dependence of fig pollinators on the relatively safe living environment with sufficient food sources in the enclosed fig syconia implies that they are vulnerable to habitat changes. However, there is still no extensive genomic evidence to reveal the evolutionary footprint of this long-term mutually beneficial symbiosis in fig pollinators. In fig syconia, there are also non-pollinator species. The non-pollinator species differ in their evolutionary and life histories from pollinators. We conducted comparative analyses on 11 newly sequenced fig wasp genomes and one previously published genome. The pollinators colonized the figs approximately 66.9 million years ago, consistent with the origin of host figs. Compared with non-pollinators, many more genes in pollinators were subject to relaxed selection. Seven genes were absent in pollinators in response to environmental stress and immune activation. Pollinators had more streamlined gene repertoires in the innate immune system, chemosensory toolbox, and detoxification system. Our results provide genomic evidence for the differentiation between pollinators and nonpollinators. The data suggest that owing to the long-term adaptation to the fig, some genes related to functions no longer required are absent in pollinators. Copyright (C) 2021, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, and Genetics Society of China. Published by Elsevier Limited and Science Press. All rights reserved.

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