Efeitos genéticos e ambientais sobre a idade à primeira concepção de fêmeas suínas / Estimates of genetic and environmental effects on age at first conception of gilts
Arq. bras. med. vet. zootec
; 60(2): 499-502, abr. 2008.
Article
en Pt
| LILACS
| ID: lil-484682
Biblioteca responsable:
BR68.1
ABSTRACT
The genetic and environmental factors that affect age at first conception (AFC) of gilts were evaluated, using 466 observations of Dalland animals (C-40). The software program MTDFREML was used to assess the genetic parameters on an animal model that included as fixed effect, contemporary group and, as random effects, the additive genetic, the common litter and the error. Mean value of AFC was 241.12±25.9 days, with CV of 8.5 percent. Variance analysis showed that year (P<0.01), season (P<0.01) and herd effects (P<0.01) were important sources of variation of AFC. The throat effect (P=0.34) was not important for the AFC, but the mother of the gilts (P<0.01) was an important source of variation. The heritability estimate was 0.44±0.14 that this trait would yield genetic gain as a response to the selection.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
LILACS
Asunto principal:
Reproducción
/
Porcinos
/
Fertilización
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
Pt
Revista:
Arq. bras. med. vet. zootec
Asunto de la revista:
MEDICINA VETERINARIA
Año:
2008
Tipo del documento:
Article
País de afiliación:
Brasil
/
Portugal