Artigo
Efeitos genéticos e ambientais sobre a idade à primeira concepção de fêmeas suínas
Fecha
2008-04-01Registro en:
Arquivo Brasileiro de Medicina Veterinária e Zootecnia. Universidade Federal de Minas Gerais, Escola de Veterinária, v. 60, n. 2, p. 499-502, 2008.
0102-0935
10.1590/S0102-09352008000200035
S0102-09352008000200035
WOS:000256791400035
S0102-09352008000200035.pdf
2024359465492863
7445254960858159
Autor
Universidade Estadual Paulista (Unesp)
Universidade Federal do Piauí (UFPI)
Universidade Federal Rural de Pernambuco (UFRPE)
Universidade de Aveiro
Resumen
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 %. 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.