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榕树和授粉蜂的基因组为榕小蜂的共进化提供了见解
作者:小柯机器人 发布时间:2020/10/10 14:04:38

美国伊利诺伊大学香槟分校Ray Ming和中国科学院热带森林生态重点实验室Jin Chen课题组合作取得一项新成果。他们发现榕树和授粉蜂的基因组为榕小蜂的共进化提供了见解。该项研究成果在线发表在2020年10月8日的《细胞》上。

研究人员对中国榕树、小叶榕、缺乏气生根的叶榕以及一个与小叶榕共同进化的黄蜂-榕小蜂的基因组进行了测序。对两个榕属基因组的比较分析揭示了与适应性进化相关的动态核型变异。生长素复制相关基因的拷贝数扩展和植物生长素产生的增加与小叶榕气生根的发育有关。雄性植株特有的AGAMOUS旁系同源物FhAG2被鉴定为叶榕性别决定的候选基因。

榕属物种的种群基因组分析表明,与它们传粉媒介有关的形态和生理共适应基因组特征涉及到萜类和苯类化合物。这三个基因组为在共生系统中研究气生根、雌雄同株和雌雄异株物种的起源提供了见解和基因组资源。

研究人员表示,榕树以其独特的气生根而著称。榕属包括与授粉黄蜂在进化过程中形成物种特异共生系统中的物种。

附:英文原文

Title: Genomes of the Banyan Tree and Pollinator Wasp Provide Insights into Fig-Wasp Coevolution

Author: Xingtan Zhang, Gang Wang, Shengcheng Zhang, Shuai Chen, Yibin Wang, Ping Wen, Xiaokai Ma, Yan Shi, Rui Qi, Yang Yang, Zhenyang Liao, Jing Lin, Jishan Lin, Xiuming Xu, Xuequn Chen, Xindan Xu, Fang Deng, Lihua Zhao, Yi-lun Lee, Rong Wang, Xiao-Yong Chen, Yann-rong Lin, Jisen Zhang, Haibao Tang, Jin Chen, Ray Ming

Issue&Volume: 2020-10-08

Abstract: Banyan trees are distinguished by their extraordinary aerial roots. The Ficus genus includes species that have evolved a species-specific mutualism system withwasp pollinators. We sequenced genomes of the Chinese banyan tree, F. microcarpa, and a species lacking aerial roots, F. hispida, and one wasp genome coevolving with F. microcarpa, Eupristina verticillata. Comparative analysis of the two Ficus genomes revealed dynamic karyotype variation associated with adaptive evolution.Copy number expansion of auxin-related genes from duplications and elevated auxinproduction are associated with aerial root development in F. microcarpa. A male-specific AGAMOUS paralog, FhAG2, was identified as a candidate gene for sex determination in F. hispida. Population genomic analyses of Ficus species revealed genomic signatures of morphological and physiological coadaptationwith their pollinators involving terpenoid- and benzenoid-derived compounds. Thesethree genomes offer insights into and genomic resources for investigating the genesesof aerial roots, monoecy and dioecy, and codiversification in a symbiotic system.

DOI: 10.1016/j.cell.2020.09.043

Source: https://www.cell.com/cell/fulltext/S0092-8674(20)31240-X

期刊信息
Cell:《细胞》,创刊于1974年。隶属于细胞出版社,最新IF:36.216
官方网址:https://www.cell.com/