Parâmetros genéticos para escore de umbigo e características de produção em bovinos da raça Nelore
2003
In this study 11,310 visual score measurements of navel characteristic, collected from bovines, were used. Visual scores for navel (NS), ranged from 1 (the longest) to 5 (the shortest). Variance components, genetic parameters and genetic correlations between navel characteristic of 18-month old animals and growth characteristics (weaning weight -WW and weight gain from weaning to over year -WG345) were estimated using a two-traits animal model. Heritability estimates were 0.31 (NS) abd 0.14 (WG345), and the genetic correlation estimates were: -0.05 (NS×WW) and 0.14 (WW×WG345) and the estimated correlation between navel (female) ´ navel (male) was 0.80. Score navel can be object of selection and selection for shorter navel does not apparently significantly affect animal performance for WW and WG345.
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