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八种危的比利时绵羊品种的基因组表征和多样性评估

R Meyermans¹, W Gorssen¹, N Aerts¹

¹Center for Animal Breeding and Genetics, Department of Biosystems, KU Leuven, Kasteelpark Arenberg 30 - 2472, 3001 Leuven, Belgium.

Animal : an international journal of animal bioscience

|September 14, 2024

概括

对八种比利时绵羊品种的基因分析显示,近亲繁殖率高,实际种群规模低,表明它们处于危状态. 对这些独特的当地绵羊种群来说,保护工作至关重要.

科学领域:

动物遗传学动物遗传学
保护基因组学保护基因组学
羊的繁殖羊的繁殖

背景情况:

保护本土牲畜品种对于保存独特的遗传特征至关重要.
比利时本地绵羊品种具有独特的特征,需要进行保护评估.
了解遗传多样性是有效的品种管理和保护生物多样性的关键.

研究的目的:

为了对八种本土比利时绵羊品种进行基因组表征.
用血统和SNP数据评估遗传多样性,近亲繁殖水平和人口结构.
为改善这些当地绵羊品种的管理和保护策略提供见解.

主要方法:

在8个品种687只羊的基因定型使用45,978个自体单核酸多态 (SNP).
对血统数据和同卵性 (ROH) 运行进行分析,以估计近亲繁殖系数和有效种群规模.
使用主要成分分析,添加剂分析,Fst计算和具有国际品种的家族遗传树的种群结构分析.

主要成果:

品种平均内生估计在3.3%至11.3% (血统) 和4.1%至8.5% (基因组) 之间.
实际种群规模低于100个 (基于血统) 和低于24个 (基于基因组),表明危的状态.
在ROH岛上发现了六种品种,其中一些与国际品种重叠,并发现了各种各样的父系血统起源.

结论:

研究的八种比利时绵羊品种在遗传上处于危状态,需要采取紧急保护行动.
基因组洞察力揭示了与国际品种的品种关系和潜在的侵入.
这项研究增强了比利时当地绵羊品种的知识,支持了全球保护工作.

关键词:

实际人口规模实际人口规模.遗传多样性遗传多样性当地的品种本地品种.祖父的血统祖父的血统运行 homozygosity 的运行.

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