Abstract

MARCONDES, C.R. et al. Bayesian analysis for the index scrotal circumference/weight on Nellore animals born in the Tocantins State, Brazil. Arch. zootec. [online]. 2011, vol.60, n.232, pp.871-882. ISSN 1885-4494.  https://dx.doi.org/10.4321/S0004-05922011000400004.

The aim of this study was to estimate the genetic parameters of the index scrotal circumference/weight standarized for 365 days of age (IND365), via bayesian inference, in two separate models of analysis on Nellore animals born in the Tocantins state, Brazil. The file was composed of 693 records of the IND365 divided into 16 contemporaneous group. Variance components were analyzed via bayesian inference, through the programs in Fortran language. Sampling of every 100 or 500 rounds and a little conservative burn-in can be implemented. Means of direct heritabilities were 0.18 (with and without maternal effect) and 0.14 for maternal heritabilities. These results suggest that the IND365 can be used as alternative criterion in breeding programs to Nellore cattle and respond satisfactorily to the selection process.

Keywords : Alternative selection criteria; Beef cattle; Genetic parameters.

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