黄颡鱼野生与养殖群体遗传多样性与遗传结构比较
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作者单位:

1.华中农业大学水产学院/农业农村部淡水生物繁育重点实验室/教育部长江经济带大宗水生生物产业绿色发展工程研究中心/池塘健康养殖湖北省工程实验室,武汉 430070;2.湖北黄优源渔业发展有限公司,武汉 430299

作者简介:

曹靖花,E-mail:JeongH@163.com

通讯作者:

沈志刚,E-mail:zgshen2017@mail.hzau.edu.cn

中图分类号:

Q959.499

基金项目:

国家自然科学基金项目(32273122);国家科技重大专项农业生物育种重大项目(2023ZD04068);中央高校基本科研业务费专项(2662025FW011;2662025SCPY007)


Comparative analysis of genetic diversity and structure of all-female,wild,and other cultured populations in yellow catfish Tachysurus fulvidraco
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1.College of Fisheries/Key Laboratory of Freshwater Animal Breeding/Ministry of Agriculture, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt/Ministry of Education,Hubei Provincial Engineering Laboratory for Pond Aquaculture,Huazhong Agricultural University,Wuhan 430070,China;2.HuBei HuangYouYuan Fishery Development Limited Company,Wuhan 430299,China

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    摘要:

    为明确全雌黄颡鱼种群的遗传多样性特征与遗传结构,揭示其与野生、其他养殖群体的遗传学差异,以湖北省黄颡鱼为研究对象,对野生(LH)及含全雌(AF)种群在内的湖北省6个养殖群体(WH、QJ、YX、JM、JZ,均为繁殖亲本)的210尾个体进行全基因组重测序,系统分析这7个群体的遗传多样性和遗传结构。结果表明,在遗传多样性方面,全雌种群的核苷酸多样性(nucleotide diversity, ND)、多态信息含量(polymorphism information content, PIC)、观测杂合度(observed heterozygosity, Ho)和期望杂合度(expected heterozygosity, He)分别为0.000 5、0.046 9、0.052 5和0.046 9,其他养殖群体平均值则分别为0.000 6、0.047 7、0.052 4和0.047 7,无显著差异;而野生群体ND、PIC、Ho和He分别为0.001 7、0.178 4、0.197 4和0.178 4,显著高于全雌及其他养殖群体。进一步分析雌性个体发现,全雌群体的ND、PIC、Ho和He值仍与其他养殖群体中雌性均值(分别为0.000 6、0.047 3、0.052 2和0.047 3)无显著差异,但均远低于野生雌性群体(分别为0.004 1、0.302 2、0.508 3和0.352 3)。遗传结构特征方面,系统发育树和主成分分析结果显示,全雌养殖种群中存在与其他6个群体亲缘关系较近的个体,且养殖群体与野生群体的部分个体也具有相似的遗传背景。综上,全雌及养殖群体遗传多样性接近,均显著低于野生群体,这也提示未来黄颡鱼育种工作中,针对性提升雌性亲本的遗传多样性对保障种质质量与产业可持续发展具有重要意义。

    Abstract:

    In order to explore the genetic diversity and structure of all-female yellow catfish (Tachysurus fulvidraco) population and to reveal their genetic differences from wild and cultured populations,this study focused on yellow catfish in Hubei Province. A total of 210 individuals were collected from 1 wild population (LH) and 6 cultured populations (WH,QJ,YX,JM,JZ,all being breeding parent populations) containing the all-female population (AF) in Hubei Province. Whole-genome resequencing was performed on these individuals,and the genetic diversity and genetic structure of the 7 populations were systematically analyzed. The results showed the following: In terms of genetic diversity,the nucleotide diversity (ND),average polymorphism information content (PIC),average observed heterozygosity (Ho),and expected heterozygosity (He) of the all-female populations were 0.000 5,0.046 9,0.052 5 and 0.046 9,respectively. the corresponding indices of the other cultured populations were 0.000 6,0.047 7,0.052 4,and 0.047 7,respectively,with no significant difference between the all-female population and the other cultured populations. However,the ND,PIC,Ho,and He of the wild populations were 0.001 7,0.178 4,0.197 4 and 0.178 4,respectively,which were significantly higher than those of the all-female population and other cultured populations. Further analysis of female individuals revealed that the ND, PIC, Ho, and He of the all female population showed no significant difference from the average values of the female individuals in other cultured populations (0.000 6, 0.047 3, 0.052 2, and 0.047 3, respectively), but both were much lower than those of the wild female population (0.004 1, 0.302 2, 0.508 3, and 0.352 3, respectively). Regarding genetic structure characteristics,the results of phylogenetic analysis and principal component analysis (PCA) revealed that some individuals in the all-female cultured population that had a close genetic relationship with the other 6 populations,and some individuals from the cultured populations and wild population also shared similar genetic backgrounds. In conclusion,the genetic diversity of the all-female was similar to that with the other cultured populations,and both were significantly lower than that of the wild populations,This suggests that in future yellow catfish breeding,targeted improvement of the genetic diversity of female parent populations is of great significance for ensuring germplasm quality and the sustainable development of the industry.

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曹靖花,李涛,李斌,梁浩文,刘娅,沈凡,何焱,沈志刚.黄颡鱼野生与养殖群体遗传多样性与遗传结构比较[J].华中农业大学学报,2025,44(6):231-240

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  • 收稿日期:2025-07-23
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  • 在线发布日期: 2025-12-16
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