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Effects of inbreeding on production traits and genetic evaluations in Guzerá beef cattle raised under tropical conditions.
Portes, Juliana Varchaki; Rodrigues, Gustavo Roberto Dias; de Vasconcellos Silva, Josineudson Augusto Ii; de Paula Freitas, Anielly; Mercadante, Maria Eugênia Zerlotti; Bonilha, Sarah Figueiredo Martins; Canesin, Roberta Carrilho; Valente, Julia de Paula Soares; Cyrillo, Joslaine Noely Dos Santos Gonçalves.
Afiliação
  • Portes JV; Department of Animal Science, Federal University of Rio Grande do Sul (UFRGS), Avenue Bento Gonçalves 7712, Porto Alegre, 91540-000, RS, Brazil.
  • Rodrigues GRD; School of Agricultural and Veterinarian Sciences (FCAV), São Paulo State University (UNESP), Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, 14884-900, SP, Brazil. grd.rodrigues@unesp.br.
  • de Vasconcellos Silva JAI; Institute of Animal Science (IZ), Beef Cattle Research Center, Rodovia Carlos Tonati 94, Sertãozinho, 13380-011, SP, Brazil. grd.rodrigues@unesp.br.
  • de Paula Freitas A; School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (UNESP), Street Prof. Doutor Walter Mauricio Correa, Botucatu, 18618-681, SP, Brazil.
  • Mercadante MEZ; Department of Genetics, University of São Paulo (USP), Avenue Bandeirantes 3900, Ribeirão Preto, 14040-905, SP, Brazil.
  • Bonilha SFM; School of Agricultural and Veterinarian Sciences (FCAV), São Paulo State University (UNESP), Via de Acesso Prof. Paulo Donato Castelane, Jaboticabal, 14884-900, SP, Brazil.
  • Canesin RC; Institute of Animal Science (IZ), Beef Cattle Research Center, Rodovia Carlos Tonati 94, Sertãozinho, 13380-011, SP, Brazil.
  • Valente JPS; Institute of Animal Science (IZ), Beef Cattle Research Center, Rodovia Carlos Tonati 94, Sertãozinho, 13380-011, SP, Brazil.
  • Cyrillo JNDSG; Institute of Animal Science (IZ), Beef Cattle Research Center, Rodovia Carlos Tonati 94, Sertãozinho, 13380-011, SP, Brazil.
Trop Anim Health Prod ; 56(4): 132, 2024 Apr 20.
Article em En | MEDLINE | ID: mdl-38642253
ABSTRACT
The objectives of this study were to evaluate the influence of inbreeding on growth traits and body measurements, as well as on the estimation of genetic parameters and genetic trends in Guzerá cattle. Phenotypic records of 4,212 animals selected for postweaning weight from Guzerá Breeding Program of Advanced Beef Cattle Research Center were utilized. The pedigree file contained records from 7,213 animals born from 1928 to 2019. The traits analyzed were birth weight (BW), weights adjusted to 210, 378 and 550 days of age (W210, W378 and W550, respectively), chest girth at 378 and 550 days of age (CG378 and CG550), scrotal circumference (SC), and hip height at 378 and 550 days of age (HH378 and H550). Linear regression was used to evaluate the effects of inbreeding on traits. Genetic parameters were obtained using models including or not the effect of inbreeding as a covariate. Inbreeding had negative effects (P ≤ 0.01) on BW (-0.09 kg), W378 (-2.86 kg), W550 (-2.95 kg), HH378 (-0.10 cm), and H550 (-0.29 cm). The lowest and highest heritability estimates were obtained for W210 (0.21 ± 0.07) and HH550 (0.57 ± 0.06), respectively. The genetic correlations were strong and positive between all traits, ranging from 0.44 ± 0.08 (SC x HH) to 0.99 ± 0.01 (W378 x W550). Spearman correlations between EBVs obtained with or without inbreeding effect ranged from 0.968 to 0.995 (P < 0.01). The results indicate loss of productive performance in inbred animals. However, the inclusion of inbreeding coefficient in genetic evaluation models did not alter the magnitude of genetic parameters or genetic trends for the traits studied.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Clima Tropical / Endogamia Limite: Animals / Pregnancy Idioma: En Revista: Trop Anim Health Prod Ano de publicação: 2024 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: Clima Tropical / Endogamia Limite: Animals / Pregnancy Idioma: En Revista: Trop Anim Health Prod Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos