Analysis of the Pedigree and Ancestors of the Cutting Population of the Quarter Horse Breed

Detalhes bibliográficos
Autor(a) principal: Yahagi Rodrigues, Larissa [UNESP]
Data de Publicação: 2021
Outros Autores: da Silva Faria, Ricardo António [UNESP], de Vasconcelos Silva, Josineudson Augusto II. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.jevs.2021.103385
http://hdl.handle.net/11449/205866
Resumo: The aim of this study was to evaluate the genetic diversity and to identify the most influential ancestors in the population of Brazilian Quarter Horses participating in cutting competitions. Data from 1,590 elite horses born between 1970 and 2015, which participated in cutting competitions between 1981 and 2018, were evaluated based on the pedigree file that contained 5,832 animals born since 1834. Evaluation of the quality of the pedigree data showed a mean number of known equivalent generations of 5.4 ± 1.5 and a mean generation interval of 11.7 ± 8.8 years. The inbreeding coefficient (1.98 ± 7.13%), relatedness coefficient (2.18 ± 0.01%), and individual increase in inbreeding (0.43 ± 0.01%) were low. The effective population size (Ne) was 136 animals. The probability of gene origin indicated effective numbers of founders, ancestors, and founder genomes of 255, 37, and 23 animals, respectively. The number of founders and ancestors was 1,852 and 899 animals, respectively, with 10, 50, and 100 ancestors explaining 39.2%, 67.9%, and 91.6%, respectively, of the genetic diversity of the population. The five most influential ancestors were Doc Bar, Peppy San Badger, Freckles Playboy, Poco Lena, and High Brow Cat, accumulating 30.7% of the marginal genetic contributions of the population. Few ancestors were responsible for the genetic diversity, resulting in the narrowing of the initial genetic base. Breeders depend on a small group of ancestors, which could be corrected by increasing the number of breeding animals and by directed mating using ancestors of different origins.
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spelling Analysis of the Pedigree and Ancestors of the Cutting Population of the Quarter Horse BreedAncestorsFoundersGenetic driftInbreedingThe aim of this study was to evaluate the genetic diversity and to identify the most influential ancestors in the population of Brazilian Quarter Horses participating in cutting competitions. Data from 1,590 elite horses born between 1970 and 2015, which participated in cutting competitions between 1981 and 2018, were evaluated based on the pedigree file that contained 5,832 animals born since 1834. Evaluation of the quality of the pedigree data showed a mean number of known equivalent generations of 5.4 ± 1.5 and a mean generation interval of 11.7 ± 8.8 years. The inbreeding coefficient (1.98 ± 7.13%), relatedness coefficient (2.18 ± 0.01%), and individual increase in inbreeding (0.43 ± 0.01%) were low. The effective population size (Ne) was 136 animals. The probability of gene origin indicated effective numbers of founders, ancestors, and founder genomes of 255, 37, and 23 animals, respectively. The number of founders and ancestors was 1,852 and 899 animals, respectively, with 10, 50, and 100 ancestors explaining 39.2%, 67.9%, and 91.6%, respectively, of the genetic diversity of the population. The five most influential ancestors were Doc Bar, Peppy San Badger, Freckles Playboy, Poco Lena, and High Brow Cat, accumulating 30.7% of the marginal genetic contributions of the population. Few ancestors were responsible for the genetic diversity, resulting in the narrowing of the initial genetic base. Breeders depend on a small group of ancestors, which could be corrected by increasing the number of breeding animals and by directed mating using ancestors of different origins.Universidade Estadual Paulista (Unesp) Faculdade de Medicina Veterinária e ZootecniaUniversidade Estadual Paulista (Unesp) Faculdade de Ciências Agrárias e VeterináriasEscola Profissional Agrícola Quinta da LageosaUniversidade Estadual Paulista (Unesp) Faculdade de Medicina Veterinária e ZootecniaUniversidade Estadual Paulista (Unesp) Faculdade de Ciências Agrárias e VeterináriasUniversidade Estadual Paulista (Unesp)Escola Profissional Agrícola Quinta da LageosaYahagi Rodrigues, Larissa [UNESP]da Silva Faria, Ricardo António [UNESP]de Vasconcelos Silva, Josineudson Augusto II. [UNESP]2021-06-25T10:22:36Z2021-06-25T10:22:36Z2021-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.jevs.2021.103385Journal of Equine Veterinary Science, v. 99.0737-0806http://hdl.handle.net/11449/20586610.1016/j.jevs.2021.1033852-s2.0-85100750031Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Equine Veterinary Scienceinfo:eu-repo/semantics/openAccess2021-10-22T19:10:46Zoai:repositorio.unesp.br:11449/205866Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:58:38.050675Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Analysis of the Pedigree and Ancestors of the Cutting Population of the Quarter Horse Breed
title Analysis of the Pedigree and Ancestors of the Cutting Population of the Quarter Horse Breed
spellingShingle Analysis of the Pedigree and Ancestors of the Cutting Population of the Quarter Horse Breed
Yahagi Rodrigues, Larissa [UNESP]
Ancestors
Founders
Genetic drift
Inbreeding
title_short Analysis of the Pedigree and Ancestors of the Cutting Population of the Quarter Horse Breed
title_full Analysis of the Pedigree and Ancestors of the Cutting Population of the Quarter Horse Breed
title_fullStr Analysis of the Pedigree and Ancestors of the Cutting Population of the Quarter Horse Breed
title_full_unstemmed Analysis of the Pedigree and Ancestors of the Cutting Population of the Quarter Horse Breed
title_sort Analysis of the Pedigree and Ancestors of the Cutting Population of the Quarter Horse Breed
author Yahagi Rodrigues, Larissa [UNESP]
author_facet Yahagi Rodrigues, Larissa [UNESP]
da Silva Faria, Ricardo António [UNESP]
de Vasconcelos Silva, Josineudson Augusto II. [UNESP]
author_role author
author2 da Silva Faria, Ricardo António [UNESP]
de Vasconcelos Silva, Josineudson Augusto II. [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Escola Profissional Agrícola Quinta da Lageosa
dc.contributor.author.fl_str_mv Yahagi Rodrigues, Larissa [UNESP]
da Silva Faria, Ricardo António [UNESP]
de Vasconcelos Silva, Josineudson Augusto II. [UNESP]
dc.subject.por.fl_str_mv Ancestors
Founders
Genetic drift
Inbreeding
topic Ancestors
Founders
Genetic drift
Inbreeding
description The aim of this study was to evaluate the genetic diversity and to identify the most influential ancestors in the population of Brazilian Quarter Horses participating in cutting competitions. Data from 1,590 elite horses born between 1970 and 2015, which participated in cutting competitions between 1981 and 2018, were evaluated based on the pedigree file that contained 5,832 animals born since 1834. Evaluation of the quality of the pedigree data showed a mean number of known equivalent generations of 5.4 ± 1.5 and a mean generation interval of 11.7 ± 8.8 years. The inbreeding coefficient (1.98 ± 7.13%), relatedness coefficient (2.18 ± 0.01%), and individual increase in inbreeding (0.43 ± 0.01%) were low. The effective population size (Ne) was 136 animals. The probability of gene origin indicated effective numbers of founders, ancestors, and founder genomes of 255, 37, and 23 animals, respectively. The number of founders and ancestors was 1,852 and 899 animals, respectively, with 10, 50, and 100 ancestors explaining 39.2%, 67.9%, and 91.6%, respectively, of the genetic diversity of the population. The five most influential ancestors were Doc Bar, Peppy San Badger, Freckles Playboy, Poco Lena, and High Brow Cat, accumulating 30.7% of the marginal genetic contributions of the population. Few ancestors were responsible for the genetic diversity, resulting in the narrowing of the initial genetic base. Breeders depend on a small group of ancestors, which could be corrected by increasing the number of breeding animals and by directed mating using ancestors of different origins.
publishDate 2021
dc.date.none.fl_str_mv 2021-06-25T10:22:36Z
2021-06-25T10:22:36Z
2021-04-01
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1016/j.jevs.2021.103385
Journal of Equine Veterinary Science, v. 99.
0737-0806
http://hdl.handle.net/11449/205866
10.1016/j.jevs.2021.103385
2-s2.0-85100750031
url http://dx.doi.org/10.1016/j.jevs.2021.103385
http://hdl.handle.net/11449/205866
identifier_str_mv Journal of Equine Veterinary Science, v. 99.
0737-0806
10.1016/j.jevs.2021.103385
2-s2.0-85100750031
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of Equine Veterinary Science
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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