Data/hora: 04/06/2024 12:38:26

Provedor de dados: 	65	
País: 	Brazil	
Título: 	Cluster analysis of breeding values for milk yield and lactation persistency in Guzerá cattle	
Autores: 	Cruz,Diego Augusto Campos da; Savegnago,Rodrigo Pelicioni; Santana,Annaíza Braga Bignardi; Peixoto,Maria Gabriela Campolina Diniz; Bruneli,Frank Angelo Tomita; Faro,Lenira El.	
Data: 	2016-07-01	
Ano: 	2016	
Palavras-chave: 	Breeding values; Lactation curve; Random regression.	
Resumo: 	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 different groups according to milk production level and lactation persistency.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701281	
Editor: 	Universidade Federal de Santa Maria	
Relação: 	10.1590/0103-8478cr20150418	
Formato: 	text/html	
Fonte: 	Ciência Rural  v.46 n.7 2016	
Fonte: 	info:eu-repo/semantics/openAccess