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
- Universidade Estadual Paulista (UNESP)
- Universidade de São Paulo (USP)
- 0093-691X
- 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.
- 15-Apr-1999
- Theriogenology, v. 51, n. 6, p. 1151-1156, 1999.
- 1151-1156
- 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
- http://dx.doi.org/10.1016/S0093-691X(99)80018-1
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/65760
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.