{"title":"Desequilibrio de ligamiento, estratificación y patrones de ancestría en ganado Simmental","authors":"A. Amaya, W. Burgos, R. Martínez, M. Cerón-Muñoz","doi":"10.21071/az.v69i266.5109","DOIUrl":null,"url":null,"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.","PeriodicalId":40003,"journal":{"name":"Archivos de Zootecnia","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2020-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Archivos de Zootecnia","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.21071/az.v69i266.5109","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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.
Archivos de ZootecniaAgricultural and Biological Sciences-Animal Science and Zoology
CiteScore
0.50
自引率
0.00%
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0
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.
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