Principal components for morphometric traits in Campolina horses

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Federal da Bahia (UFBA)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorSolar Diaz, Iara Del Pilar-
Autor(es): dc.creatorStrauss Borges Junqueira, Gleb-
Autor(es): dc.creatorAparecida Rocha Cruz, Valdecy-
Autor(es): dc.creatorAlbano Araújo de Oliveira, Chiara-
Autor(es): dc.creatorNunes de Oliveira, Henrique [UNESP]-
Autor(es): dc.creatorMiguel Ferreira de Camargo, Gregório-
Autor(es): dc.creatorBermal Costa, Raphael-
Data de aceite: dc.date.accessioned2022-02-22T00:48:30Z-
Data de disponibilização: dc.date.available2022-02-22T00:48:30Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-03-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1111/jbg.12521-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/206878-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/206878-
Descrição: dc.descriptionPrincipal component analysis (PCA) was applied to evaluate the genetic variability and relationship between 15 morphometric traits in 91,483 Campolina horses, as well as to propose an index based on an aggregate genotype that promotes a particular selection objective. PCA was applied to the genetic (co)variance matrix among variables. After calculation of the principal components, the breeding values were estimated to obtain an index related to the component that explained most of the variation. The first principal component (PC1) accounted for 97.8% of the total additive genetic variance of the traits. PC1 contrasted animals in terms of body size (wither, back and croup heights, body length, and thoracic girth). PC1 traits showed higher heritabilities and positive and high genetic correlations. An index was obtained (HPC1) with the combination of the breeding values of different traits from PC1 which permitted the use of this index as an aggregate genotype to identify the best animals for selection. The second principal component (PC2) was much smaller and grouped traits related to head and neck morphometry, among others. These traits are commonly used for breed qualification, a fact explaining the small variation in this component. An evaluation of the effect of HPC1 on withers height in two-trait analysis was also made which provided positive genetic correlations of moderate to high magnitude (0.73–0.86), indicating that selection for this trait (important in Campolina horses) is accounted for in the index. The use of HCP1 could be considered as an important alternative to selection since it does not consider a single trait but rather a set of variables that capture body proportions.-
Descrição: dc.descriptionEscola de Medicina e Veterinária e Zootecnia UFBA Universidade Federal da Bahia-
Descrição: dc.descriptionDepartamento de Zootecnia Faculdade de Ciencias Agrarias e Veterinarias UNESP Universidade Estadual Paulista Julio de Mesquita Filho-
Descrição: dc.descriptionDepartamento de Zootecnia Faculdade de Ciencias Agrarias e Veterinarias UNESP Universidade Estadual Paulista Julio de Mesquita Filho-
Formato: dc.format179-187-
Idioma: dc.languageen-
Relação: dc.relationJournal of Animal Breeding and Genetics-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectaggregate genotype-
Palavras-chave: dc.subjectbody size-
Palavras-chave: dc.subjectbreed qualification-
Palavras-chave: dc.subjectEquus caballus-
Palavras-chave: dc.subjectheritability-
Palavras-chave: dc.subjectindex-
Palavras-chave: dc.subjectselection-
Palavras-chave: dc.subjectwithers height-
Título: dc.titlePrincipal components for morphometric traits in Campolina horses-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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