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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/65760
Title: 
Repeatability and heritability of response to superovulation in Holstein cows
Author(s): 
Institution: 
  • Universidade Estadual Paulista (UNESP)
  • Universidade de São Paulo (USP)
ISSN: 
0093-691X
Abstract: 
The objective of this study was to estimate the relative effects of genetic and phenotypic factors on the efficacy and efficiency of superovulation for Holstein-Friesian cows reared in Brazil. A database, established by the Associacao Brasileira de Criadores de Bovinos da Raca Holandesa, consisting of a total of 5387 superovulations of 2941 cows distributed over 473 herds and sired by 690 bulls was used for the analysis. The records were analyzed by MTDFREML (Multiple Trait Derivative-Free Restricted Maximum Likelihood), using a repeatability animal model. The fixed effects included in the model were contemporaneous group (veterinarian, herd, year and season of the superovulation); number of semen doses; cow age; and superovulation order. The estimated repeatability of the number of the transferable embryos was low (0.13), and the estimated heritability was 0.03. These results indicate that environmental factors play a critical role in the response of a cow to a superovulation treatment. There is little evidence that future responses to superovulation by individual females can be predicted by previous treatment(s) or that superovulation response is an heritable trait.
Issue Date: 
15-Apr-1999
Citation: 
Theriogenology, v. 51, n. 6, p. 1151-1156, 1999.
Time Duration: 
1151-1156
Keywords: 
  • Genetic aspects
  • Holstein-Friesian
  • Yield embryos
  • aging
  • animal
  • animal disease
  • artificial insemination
  • cattle
  • cow
  • data analysis
  • data base
  • embryo transfer
  • environment
  • environmental factor
  • female
  • genetics
  • heritability
  • nonhuman
  • physiology
  • reproducibility
  • season
  • superovulation
  • Aging
  • Animals
  • Cattle
  • Embryo Transfer
  • Environment
  • Female
  • Insemination, Artificial
  • Reproducibility of Results
  • Seasons
  • Superovulation
  • Animalia
  • Bos taurus
  • Friesia
Source: 
http://dx.doi.org/10.1016/S0093-691X(99)80018-1
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/65760
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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