Unveiling potential sex-determining genes and sex-specific markers in autotetraploid Carassius auratus  

作　　者：Kun Zhang Xu Huang Chongqing Wang Xidan Xu Xiaowei Xu Xiaoping Dong Qingwen Xiao Jinhai Bai Yue Zhou Zhengkun Liu Xinyi Deng Yan Tang Siyang Li Enkui Hu Wanjing Peng Ling Xiong Qinbo Qin Shaojun Liu 

机构地区：[1]State Key Laboratory of Developmental Biology of Freshwater Fish,Engineering Research Center of Polyploid Fish Reproduction and Breeding of the State Education Ministry,College of Life Sciences,Hunan Normal University,Changsha 410081,China [2]Nansha-South China Agricultural University Fishery Research Institute,Guangzhou 511457,China [3]Hunan Yuelu Mountain Science and Technology Co.,Ltd.,for Aquatic Breeding,Changsha 410081,China

出　　处：《Science China(Life Sciences)》2024年第11期2444-2458,共15页中国科学（生命科学英文版）

基　　金：financially supported by the National Natural Science Foundation of China(32172972);the Science and Technology Innovation Program of Hunan Province(2021RC4028);the Special Funds for Construction of Innovative Provinces in Hunan Province(2021NK1010);Special Science Found of Nansha-South China Agricultural University Fishery Research Institute,Guangzhou,the Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province,the earmarked fund for HARS(HARS-07)。

摘　　要：Autotetraploid Carassius auratus is a stable hereditary autotetraploid fish resulting from the hybridization of Carassius auratus red var.(RCC,♀)×Megalobrama amblycephala(BSB,♂),containing four sets of RCC chromosomes.However,the molecular mechanism underlying the determination of sex in this species remains largely unknown.Currently,there lacks a full understanding of the molecular mechanisms governing sex determination and specific molecular markers to differentiate sex in this species.In this study,25,801,677 SNPs(Singlenucleotide polymorphism)and 6,210,306 Indels(insertion-deletion)were obtained from whole-genome resequencing of 100 individuals(including 50 female and 50 male).Further identification confirmed the candidate chromosomes as Chr46B,with the sex-determining region located at Chr46B:22,500,000‒22,800,000 bp.Based on the male-specific insertion(26 bp)within the candidate sex-determining region,a pair of sex-specific molecular markers has been identified.In addition,based on the screening of candidate sex-determining region genes and RT-qPCR validation analysis,ADAM10,AQP9 and tc1a were identified as candidate sex-determining genes.These findings provide a robust foundation for investigating sex determination mechanisms in fish,the evolution of sex chromosomes,and the development of monosex populations.

关 键 词：autotetraploid Carassius auratus sex-specific marker sex determination gene RE-SEQUENCING 

分 类 号：S917.4[农业科学—水产科学]