Changes in the relationship between an endangered cattle breed and its mainstream sister breed over time

IF 1.9 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE Livestock Science Pub Date : 2025-03-01 Epub Date: 2025-01-30 DOI:10.1016/j.livsci.2025.105652

H. Wilmot , N. Gengler , J. Bormann , M.P.L. Calus

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Abstract

Because of lack of pedigree records, the history of the Red-Pied of the Ösling (RPO) breed, which is an endangered local red-pied cattle breed from Luxembourg, is not really known. However, it is assumed that there has been exchanges between the RPO and the Meuse-Rhine-Yssel (MRY), another red-pied cattle breed from The Netherlands. To validate this assumption, we estimated the changes in the relationships between the RPO and MRY breeds over time by the definition of cohorts with different birthdates in the MRY breed. The fixation indexes between the RPO breed and the different MRY cohorts, as well as a principal component analysis, showed that the RPO breed was more related to the oldest MRY animals, born before 1990, and to the youngest MRY animals, born after 2009. This confirmed the a priori known pattern of importation of MRY animals to the RPO population over time. Based on results obtained in a genomic relationship matrix and on the proportion of opposing homozygotes, we could infer sire-offspring relationships between an MRY sire and three RPO animals. To complete the pedigree of RPO animals even further and optimize exchanges between the MRY and RPO breeds, it would be interesting to have access to more MRY genotypes.

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随着时间的推移，濒临灭绝的牛品种与其主流姊妹品种之间关系的变化

由于缺乏血统记录，红斑牛Ösling （RPO）品种的历史并不为人所知，这是一种来自卢森堡的濒危当地红斑牛品种。然而，据推测，RPO和另一种来自荷兰的红斑牛品种默兹-莱茵-伊塞尔（MRY）之间存在交换。为了验证这一假设，我们通过定义MRY品种中不同出生日期的队列，估计了RPO和MRY品种之间关系随时间的变化。RPO品种与不同MRY队列之间的固定指标以及主成分分析表明，RPO品种与1990年以前出生的最老的MRY动物和2009年以后出生的最年轻的MRY动物关系更密切。这证实了随着时间的推移，MRY动物输入RPO种群的先验已知模式。根据在基因组关系矩阵中获得的结果和相反纯合子的比例，我们可以推断出一个MRY父系和三个RPO动物之间的父系后代关系。为了进一步完善RPO动物的谱系，并优化MRY和RPO品种之间的交流，获得更多的MRY基因型将是一件有趣的事情。

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来源期刊

Livestock Science 农林科学-奶制品与动物科学

CiteScore

4.30

自引率

5.60%

发文量

237

审稿时长

3 months

期刊介绍： Livestock Science promotes the sound development of the livestock sector by publishing original, peer-reviewed research and review articles covering all aspects of this broad field. The journal welcomes submissions on the avant-garde areas of animal genetics, breeding, growth, reproduction, nutrition, physiology, and behaviour in addition to genetic resources, welfare, ethics, health, management and production systems. The high-quality content of this journal reflects the truly international nature of this broad area of research.