Genetic and environmental effects on sexual precocity traits in Nellore cattle

ABSTRACT - The objectives of this study were to evaluate the environmental effects (age of dam at lambing, type of birth and sex of lamb) and genetic groups (Santa Inês and ½

ABSTRACT - The objective of this study was to evaluate the effects of genetic group and environmental factors, including farm of origin, season of calving and lactation number, on

The following traits were included in the analyses: age at first calving, birth to weaning gain, post-weaning weight gain, visual scores of conformation, precocity, and

Abstract – The objective of this work was to estimate covariance functions for additive genetic and permanent environmental effects, as well as to obtain genetic parameters for

Likewise, for ADG1, ADG2 and ADG3 the model included, as fi xed, the contemporary group and, as covariates, the linear and quadratic effects of age of the animal at weaning or

Thus, the model considered the direct genetic effects as random ones, as fixed, the effects of sex and year of birth and the linear effects of height at

The results showed that: a) the non-additive genetic effects predominated in the expression of.. the number of days to emergence and mean plant height; b) the additive genetic

They concluded that the model including additive direct genetic, additive maternal genetic, permanent environment, and maternal permanent environment effects respectively