基于SNP和ROH的泰山黑猪群体遗传结构分析

doi:10.16174/j.issn.1673-4645.2024.03.007

摘要/Abstract

摘要： 旨在从分子水平解析泰山黑猪群体的遗传多样性与家系结构，为泰山黑猪选育和保护提供科学理论依据。本研究利用“中芯一号”SNP芯片对130头核心群泰山黑猪进行群体遗传结构分析。结果发现，泰山黑猪育种群体平均期望杂合度（He）为0.367，平均观察杂合度（HO）为0.397，有效群体含量（Ne）为5.0，泰山黑猪育种群体平均多态性信息含量（PIC）为0.285，IBS平均遗传距离为0.277，G矩阵结果与IBS矩阵一致，表明泰山黑猪群体之间亲缘关系中等。130头泰山黑猪共检测到2777条ROHs，单个ROH平均长度为6.21Mb，所有ROH范围在1.54M～187.61Mb，基于ROH的近交系数（FROH）平均为0.054。将130头泰山黑猪划分为1～4个家系，母猪额外划分1个其他家系。上述结果表明，泰山黑猪群体内家系数量适中，个体亲缘关系呈中等程度，近交系数较低，群体的遗传多样性较高。个别家系公猪数量偏少，后期应注意后代的选育，避免造成血统流失；选择与母猪亲缘关系较远的个体交配的后代进行留种，逐渐降低群体近交系数。

中图分类号: S828.8；S813

郭宝港，王明凯，于世浩，张文娟，申小冉，曾勇庆，陈伟. 基于SNP和ROH的泰山黑猪群体遗传结构分析[J]. 中国猪业, 2024, 19(3): 68-76.

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