Desequilibrio de ligamiento, estratificación y patrones de ancestría en ganado Simmental

Archivos de Zootecnia Pub Date : 2020-01-15 DOI:10.21071/az.v69i266.5109

A. Amaya, W. Burgos, R. Martínez, M. Cerón-Muñoz

引用次数: 0

Abstract

The massive use of a few bulls in artificial insemination programs affects the structure and genetic composition of a population. The aim of this study was to estimate the genetic diversity, population stratification, patterns of ancestry and linkage disequilibrium in Simmental cattle. A sample of 233 genotyped animals with 30.106 single nucleotide polymorphism (SNP) was used. Principal components analysis and probabilistic assignments were performed to estimate patterns of genetic subdivision and ancestry. Linkage disequilibrium was estimated as the square of the genetic correlation coefficient between SNP´s. The principal components analysis did not show genetic subdivision patterns within the population. However, the analysis of ancestry showed a genetic subdivision of three groups. A value of 0.3 for linkage disequilibrium was found at a distance of 33 kb. Results indicate that imported genetic material from populations with different breeding goals and selection criteria could contribute to changes on genetic structure.

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西门塔尔牛的结扎不平衡、分层和祖先模式

在人工授精项目中大量使用几头公牛会影响种群的结构和基因组成。本研究的目的是评估西门塔尔牛的遗传多样性、种群分层、祖先模式和连锁不平衡。使用233只具有30.106单核苷酸多态性（SNP）的基因型动物的样本。进行主成分分析和概率分配，以估计遗传细分和祖先的模式。连锁不平衡估计为SNP之间遗传相关系数的平方。主成分分析没有显示种群内的遗传细分模式。然而，对祖先的分析显示，基因分为三组。在33kb的距离处发现连锁不平衡值为0.3。结果表明，来自不同育种目标和选择标准群体的输入遗传物质可能导致遗传结构的变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Archivos de Zootecnia Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

0.50

自引率

0.00%

发文量

期刊介绍： Archivos de Zootecnia is a quarterly, multilingual, international science journal, published by the University of Cordoba and the Asociación Iberoamericana de Zootecnia. The journal was founded in 1952 as the voice for the Zootechnics Institute of the Veterinary Faculty at the University of Cordoba. Its aim is to disseminate results from research into animal production and related areas, giving special attention to farming systems in developing areas, their local breeds and alternative production methods.