Direct and maternal genetic effects for growth traits in indubrazil cattle
| Autor: | Ángel Ríos-Utrera, Víctor Delio Hernández-Hernández, Eugenio Villagómez Amezcua-Manjarrez, Juan Prisciliano Zárate-Martínez, José Alfredo Villagómez-Cortés |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias INIFAP Redalyc-INIFAP Redalyc Universidad Veracruzana UV Redalyc-UV. Red de Revistas Científicas de América Latina y el Caribe, España y Portugal. |
| Popis: | The objective was to estimate (co)variance components and gene- tic parameters for birth weight, adjusted 205-day (d) weaning weight, and adjusted 365-d yearling weight of Mexican Indubrazil calves obtained from an experimental herd under tropical condi- tions. (Co)variance components and genetic parameters were esti- mated fitting single-trait animal models with the MTDFREML pro- gram. For birth weight, the model included the direct and maternal genetic effects as well as the (co)variance between these two effects. The model for adjusted 205-d weaning weight was similar to the one for birth weight, but also included the maternal perma- nent environmental effect. The animal model to analyze adjusted 365-d yearling weight included the direct genetic effect. For birth weight and adjusted 205-d weaning weight, direct genetic effects were more important than maternal genetic effects. Estimates of direct heritability were: 0.27, 0.11 and 0.13 for birth weight, adjus- ted 205-d weaning weight and adjusted 365-d yearling weight, res- pectively. Estimates of maternal heritability were: 0.10 and 0.09 for birth weight and adjusted 205-d weaning weight, respectively. The estimate of the correlation between direct and maternal effects for adjusted 205-d weaning weight was relatively low (-0.27). Estima- tes of direct heritability for weaning and yearling weights suggest that such traits could be increased by direct selection. |
| Databáze: | OpenAIRE |
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