It was evaluated in this work the components of (co)variance and heritability of the parameters of egg production curve in quails in a model of double stages: the first stage is composed of the adjustment of a nonlinear curve, and the second is composed of the assessing of the genetic parameters obtained by the animal model. It was used daily individual records from laying to 90 days, starting with the first egg in the batch, of 308, 374 and 378 […]

This study aimed to verify if the selection is influenced by partial observation of laying instead of observation of total daily posture. On the first state of analyses, through a Bayesian model, it was considered as analyzed characteristics the parameters of laying probability curve in a model of random effects with function of logistic connection. On the second stage of the procedure, it was obtained the estimatives of (co)variance components and genetic parameters. It was observed an overestimation of the […]

Data consisting of 38,865 records of Large White pigs were used to estimate genetic parameters for days to 100 kg (DAYS) and backfat thickness adjusted to 100 kg (BF). Covariance components were estimated by a bivariate mixed model including the fixed effect of contemporary group and the direct and maternal additive genetic, common litter and residual random effects using the Gibbs Sampling algorithm of the MTGSAM program. Estimates of direct and common litter effects for DAYS and BF were 0.33 […]