Evolutionary divergence of subgenomes in common carp provides insights into speciation and allopolyploid success  

作　　者：Lin Chen Chengyu Li Bijun Li Xiaofan Zhou Yulin Bai Xiaoqing Zou Zhixiong Zhou Qian He Baohua Chen Mei Wang Yaguo Xue Zhou Jiang Jianxin Feng Tao Zhou Zhanjiang Liu Peng Xu 

机构地区：[1]State Key Laboratory of Mariculture Breeding,College of Ocean and Earth Sciences,Xiamen University,Xiamen 361102,China [2]Fujian Key Laboratory of Genetics and Breeding of Marine Organisms,College of Ocean and Earth Sciences,Xiamen University,Xiamen 361102,China [3]State Key Laboratory of Marine Environmental Science,College of Ocean and Earth Sciences,Xiamen University,Xiamen 361102,China [4]Integrative Microbiology Research Centre,South China Agricultural University,Guangzhou 510642,China [5]College of Fisheries,Henan Normal University,Xinxiang 453007,China [6]Henan Academy of Fishery Science,Zhengzhou 450044,China [7]Department of Biology,College of Arts and Sciences,Syracuse University,Syracuse 13244,USA

出　　处：《Fundamental Research》2024年第3期589-602,共14页自然科学基础研究（英文版）

基　　金：supported by the National Key R&D Program of China(2019YFE0119000);the National Science Fund for Distinguished Young Scholars(32225049);the National Natural Science Foundation of China(31872561);the Alliance of International Science Organizations(ANSO-CR-PP-2021-03).

摘　　要：Hybridization and polyploidization have made great contributions to speciation,heterosis,and agricultural production within plants,but there is still limited understanding and utilization in animals.Subgenome structure and expression reorganization and cooperation post hybridization and polyploidization are essential for speciation and allopolyploid success.However,the mechanisms have not yet been comprehensively assessed in animals.Here,we produced a high-fidelity reference genome sequence for common carp,a typical allotetraploid fish species cultured worldwide.This genome enabled in-depth analysis of the evolution of subgenome architecture and expression responses.Most genes were expressed with subgenome biases,with a trend of transition from the expression of subgenome A during the early stages to that of subgenome B during the late stages of embryonic development.While subgenome A evolved more rapidly,subgenome B contributed to a greater level of expression during development and under stressful conditions.Stable dominant patterns for homoeologous gene pairs both during development and under thermal stress suggest a potential fixed heterosis in the allotetraploid genome.Preferentially expressing either copy of a homoeologous gene at higher levels to confer development and response to stress indicates the dominant effect of heterosis.The plasticity of subgenomes and their shifting of dominant expression during early development,and in response to stressful conditions,provide novel insights into the molecular basis of the successful speciation,evolution,and heterosis of the allotetraploid common carp.

关 键 词：Allotetraploid Subgenome structural evolution Homoeologous expression Expression dominance shift Environmental adaptation 

分 类 号：Q78[生物学—分子生物学]