Evolutionary mechanisms and practical significance of reproductive success and clonal diversity in unisexual vertebrate polyploids

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外文摘要：Unisexual reproduction is generally relevant to polyploidy,and unisexual vertebrates are often considered an evolutionary"dead end"due to the accumulation of deleterious mutations and absence of genetic diversity.However,some unisexual polyploids have developed strategies to avoid genomic decay,and thus provide ideal models to unveil unexplored evolutionary mechanisms,from the reproductive success to clonal diversity creation.This article reviews the evolutionary mechanisms for overcoming meiotic barrier and generating genetic diversity in unisexual vertebrates,and summarizes recent research advancements in the polyploid Carassius complex.Gynogenetic gibel carp(Carassius gibelio)is a unique amphitriploid that has undergone a recurrent autotriploidy and has overcome the bottleneck of triploid sterility via gynogenesis.Recently,an efficient strategy in which ploidy changes,including from amphitriploid to amphitetraploid,then from amphitetraploid to novel amphitriploid,drive unisexual-sexual-unisexual reproduction transition and clonal diversity has been revealed.Based on this new discovery,multigenomic reconstruction biotechnology has been used to breed a novel strain with superior growth and stronger disease resistance.Moreover,a unique reproduction mode that combines both abilities of ameiotic oogenesis and sperm-egg fusion,termed as ameio-fusiongensis,has been discovered,and it provides an efficient approach to synthesize sterile allopolyploids.In order to avoid ecological risks upon escape and protect the sustainable property rights of the aquaculture seed industry,a controllable fertility biotechnology approach for precise breeding is being developed by integrating sterile allopolyploid synthesis and gene-editing techniques.This review provides novel insights into the origin and evolution of unisexual vertebrates and into the attempts being made to exploit new breeding biotechnologies in aquaculture.

外文关键词：

unisexual vertebratespolyploidyreproduction transitionclonal diversityprecise breedinggenomic reconstructioncontrollable fertility

作者：

Meng Lu、Li Zhou、Jian-Fang Gui

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作者单位：

State Key Laboratory of Freshwater Ecology and Biotechnology,Hubei Hongshan Laboratory,the Innovation Academy of Seed Design,Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China

University of Chinese Academy of Sciences,Beijing 100049,China

基金：

Agricultural Biological Breeding-2030 major project国家自然科学基金国家自然科学基金中国科学院战略规划重点项目China Agriculture Research System of MOF and MARA湖北省科技计划重大项目Hubei Hongshan LaboratoryYoung Elite Scientists Sponsorship Program by CASTExcellent Young Talents program of Wuhan

项目编号：

2023ZD04055043193011132102785XDA024030104CARS-45-072023BBA0012021hszd0012023QNRCO01

出版年：

2024

DOI：

10.1007/s11427-023-2486-2

中国科学:生命科学(英文版)

中国科学院

中国科学:生命科学(英文版)

CSTPCD

影响因子：0.806

ISSN：1674-7305

年,卷(期)：2024.67(3)

参考文献量108