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
in Portuguese
| LILACS
| ID: lil-484682
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.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Reproduction
/
Swine
/
Fertilization
Type of study:
Prognostic study
Limits:
Animals
Language:
Portuguese
Journal:
Arq. bras. med. vet. zootec
Journal subject:
Veterinary Medicine
Year:
2008
Type:
Article
Affiliation country:
Brazil
/
Portugal
Institution/Affiliation country:
UNESP/BR
/
Universidade Federal Rural de Pernambuco/BR
/
Universidade Federal do Piauí/BR
/
Universidade de Aveiro/BR
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