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Genetic parameters for milk yield and reproduction traits in the Chilean Dairy Overo Colorado cattle breed Ciencia e Investigación Agraria
Montaldo,Hugo H; Trejo,Carlos; Lizana,Carlos.
The objective of this study was to estimate genetic parameters for milk production and reproduction traits using phenotypic and pedigree information from the Dairy Overo Colorado breed from southern Chile. Single- and multi-trait mixed models were used to analyze the data. Analyses were performed using ASReml software. The heritability estimates for milk yield, fat yield, protein yield, fat content, protein content, age at first calving and calving interval were 0.29 ± 0.04, 0.34 ± 0.04, 0.30 ± 0.04, 0.56 ± 0.04, 0.56 ± 0.04, 0.01 ± 0.07 and 0.002 ± 0.02, respectively. The genetic correlations between yield traits were high and positive (≥ 0.81). The genetic correlations of milk yield with fat content (-0.32) and protein content (-0.34) were...
Tipo: Journal article Palavras-chave: Breeding; Chile; Correlation; Heritability; Local cattle breed.
Ano: 2017 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000100003
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