| Registro completo |
| Provedor de dados: |
Ciência Rural
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| País: |
Brazil
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| Título: |
Cluster analysis of breeding values for milk yield and lactation persistency in Guzerá cattle
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| 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
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| Data: |
2016-07-01
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| Ano: |
2016
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| Palavras-chave: |
Breeding values
Lactation curve
Random regression
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| 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.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701281
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| Editor: |
Universidade Federal de Santa Maria
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| Relação: |
10.1590/0103-8478cr20150418
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| Formato: |
text/html
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| Fonte: |
Ciência Rural v.46 n.7 2016
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| Direitos: |
info:eu-repo/semantics/openAccess
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