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Brazilian Sport Horse: genetic parameters for approval of Brasileiro de Hipismo stallions.
Medeiros, Bethânia Rocha; Garbade, Petra; Seixas, Luiza; Peripolli, Vanessa; McManus, Concepta.
Afiliação
  • Medeiros BR; Departamento de Medicina Animal, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
  • Garbade P; Instituto Federal Catarinense, Campus Araquari, Araquari, SC, Brazil.
  • Seixas L; Departamento de Medicina Animal, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
  • Peripolli V; Programa de Pós-Graduação em Ciências Animais, Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, Campus Darcy Ribeiro, Asa Norte, Brasilia, DF, Brazil.
  • McManus C; Instituto Federal Catarinense, Campus Araquari, Araquari, SC, Brazil. vanessa.peripolli@hotmail.com.
Trop Anim Health Prod ; 52(4): 1669-1680, 2020 Jul.
Article em En | MEDLINE | ID: mdl-31858372
The aim of this study was to evaluate genetic parameters for subjective scores given at the Brazilian Sport Horse (BSH) Stallion Approval by estimating heritability (h2) for morphological, gait, and jumping traits and genetic correlations (γg) among the functional ones and by verifying selection feasibility. The analysis included 1179 complete evaluations from 294 horses, by 4.26 ± 0.96 judges. Each trait was evaluated using mixed models in SAS® v9.2, considering the individual as a random effect. Variance components and genetic parameters were obtained by single and two-trait animal models in a derivative-free restricted maximum likelihood analysis. Since many jumping traits were not described in Breed Regulation, mixed model results were used to enlighten the criteria adopted in the assignment of scores. Balanced bodies and conformations that favor collection were preferred by judges and presented moderate heritabilities. Additive variation was found for most jumping traits, with heritability equal to 0.74 (se = 0.04) for overall jump, and estimates for the separate aspects of the jump movement ranging from near null to 0.43 (se = 0.07) for temperament. Morphological scores had little effect over gait and jump scores while trot may be indicative of some additive value for jump distance and canter for hind limb mechanics. Conformation evaluations of separate body regions presented heritability estimates similar to previous studies and may provide more informative breeding values.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Marcha / Cavalos Tipo de estudo: Prognostic_studies Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: Trop Anim Health Prod Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Marcha / Cavalos Tipo de estudo: Prognostic_studies Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: Trop Anim Health Prod Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos