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| Cruz,Diego Augusto Campos da; Savegnago,Rodrigo Pelicioni; Santana,Annaíza Braga Bignardi; Peixoto,Maria Gabriela Campolina Diniz; Bruneli,Frank Angelo Tomita; Faro,Lenira El. |
| ABSTRACT: The aim of this study was to explore the pattern of genetic lactation curves of Guzerá cattle using cluster analysis. Test-day milk yields of 5,274 first-lactation Guzerá cows were recorded in a progeny test. A total of 34,193 monthly records were analyzed with a random regression animal model using Legendre polynomials to fit additive genetic and permanent environmental random effects and mean trends. Hierarchical and non-hierarchical cluster analyses were performed based on the EBVs for monthly test-day milk yield, peak yield, lactation persistency, and partial cumulative and 305-day yields. The heritability estimates for test-day milk yields ranged from 0.24 to 0.52. Cluster analysis identified animals in the population that belong to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding values; Lactation curve; Random regression. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701281 |
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