Accuracy of genomic selection for age at puberty in a multi-breed population of tropically adapted beef cattle.
Anim Genet
; 47(1): 3-11, 2016 Feb.
Article
em En
| MEDLINE
| ID: mdl-26490440
ABSTRACT
Genomic selection is becoming a standard tool in livestock breeding programs, particularly for traits that are hard to measure. Accuracy of genomic selection can be improved by increasing the quantity and quality of data and potentially by improving analytical methods. Adding genotypes and phenotypes from additional breeds or crosses often improves the accuracy of genomic predictions but requires specific methodology. A model was developed to incorporate breed composition estimated from genotypes into genomic selection models. This method was applied to age at puberty data in female beef cattle (as estimated from age at first observation of a corpus luteum) from a mix of Brahman and Tropical Composite beef cattle. In this dataset, the new model incorporating breed composition did not increase the accuracy of genomic selection. However, the breeding values exhibited slightly less bias (as assessed by deviation of regression of phenotype on genomic breeding values from the expected value of 1). Adding additional Brahman animals to the Tropical Composite analysis increased the accuracy of genomic predictions and did not affect the accuracy of the Brahman predictions.
Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Seleção Genética
/
Maturidade Sexual
/
Cruzamento
/
Bovinos
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Anim Genet
Assunto da revista:
GENETICA
/
MEDICINA VETERINARIA
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Brasil