Ancestral gene duplications in mosses characterized by integrated phylogenomic analyses  

作　　者：Bei Gao Mo-Xian Chen Xiao-Shuang Li Yu-Qing Liang Dao-Yuan Zhang Andrew J.Wood Melvin J.Oliver Jian-Hua Zhang 

机构地区：[1]State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China [2]School of Life Sciences,The Chinese University of Hong Kong,Hong Kong,China [3]State Key Laboratory of Agrobiotechnology,The Chinese University of Hong Kong,Hong Kong,China [4]Shenzhen Institute of Synthetic Biology,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China [5]Department of Plant Biology,Southern Illinois University-Carbondale,Carbondale,IL 62901-6509,USA [6]Division of Plant Sciences,Interdisciplinary Plant Group,University of Missouri,Columbia,MO 65211,USA [7]Department of Biology,Faculty of Science,Hong Kong Baptist University,Hong Kong,China

出　　处：《Journal of Systematics and Evolution》2022年第1期144-159,共16页植物分类学报（英文版）

基　　金：This study was supported by the NSFC-Xinjiang Key Project(Grant No.U1703233 to DZ);National Science Foundation(Collaborative Research:Dimensions:Grant No.1638972 to MJO).

摘　　要：Mosses(Bryophyta)are a key group occupying an important phylogenetic position in land plant(embryophyte)evolution.The class Bryopsida represents the most diversified lineage,containing more than 95%of modern mosses,whereas other classes are species-poor.Two branches with large numbers of gene duplications were elucidated by phylogenomic analyses,one in the ancestry of all mosses and another before the separation of the Bryopsida,Polytrichopsida,and Tetraphidopsida.The analysis of the phylogenetic progression of duplicated paralogs retained on genomic syntenic regions in the Physcomitrella patens genome confirmed that the whole-genome duplication events WGD_(1) and WGD_(2) were re-recognized as the ψ event and the Funarioideae duplication event,respectively.The ψ polyploidy event was tightly associated with the early diversification of Bryopsida,in the ancestor of Bryidae,Dicranidae,Timmiidae,and Funariidae.Together,four branches with large numbers of gene duplications were unveiled in the evolutionary past of P.patens.Gene retention patterns following the four large-scale duplications in different moss lineages were analyzed and discussed.Recurrent significant retention of stress-related genes may have contributed to their adaption to distinct ecological environments and the evolutionary success of this early-diverging land plant lineage.

关 键 词：gene duplication MOSS phylogenomic PHYSCOMITRELLA POLYPLOIDY WGD 

分 类 号：Q94[生物学—植物学]