| Registro completo |
| Provedor de dados: |
PAB
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| País: |
Brazil
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| Título: |
Genetic analysis of productive and reproductive traits in multiple-breed dairy cattle populations
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| Autores: |
Ribeiro,Virgínia Mara Pereira
Merlo,Fernanda Albuquerque
Gouveia,Gabriela Canabrava
Winkelstroter,Larissa Kretli
Abreu,Luíza Rodrigues Alves
Silva,Marcos Vinícius Gualberto Barbosa da
Panetto,João Cláudio do Carmo
Paiva,Leandro de Carvalho
Cembranelli,Marcello de Aguiar Rodrigues
Toral,Fabio Luiz Buranelo
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| Data: |
2017-11-01
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| Ano: |
2017
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| Palavras-chave: |
Gyr
Heritability
Heterosis
Holstein
Selection
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| Resumo: |
Abstract: The objective of this work was to determine whether the random regression model using linear splines (RRMLS) is suitable to estimate the genetic parameters for productive and reproductive traits of a multiple-breed dairy cattle population, as well as to investigate the effect of the genetic group of the progeny on the genetic merit of the sire. The multiple-trait model (MTM) and the RRMLS with one knot fitted for every genetic group were used to obtain the genetic parameters. Records of 1/2 Holstein + 1/2 Gyr (1/2HG), 5/8 Holstein + 3/8 Gyr (5/8HG), and 3/4 Holstein + 1/4 Gyr (3/4HG) crossbreed dams were considered. The RRMLS showed better fitting. The additive and residual variances estimated by the MTM and the RRMLS were similar. Heritability varied from 0.20 to 0.33 for age at first calving, from 0.09 to 0.22 for first lactation length, and from 0.15 to 0.35 for first lactation 305-day milk yield, according to the genetic composition of the dams. The RRMLS is suitable to estimate the genetic parameters for productive and reproductive traits of multiple-breed dairy cattle populations. The genetic merit of the sires is affected by the genetic group of the progeny by which they are evaluated.
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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=S0100-204X2017001101109
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| Editor: |
Embrapa Secretaria de Pesquisa e Desenvolvimento
Pesquisa Agropecuária Brasileira
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| Relação: |
10.1590/s0100-204x2017001100017
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| Formato: |
text/html
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| Fonte: |
Pesquisa Agropecuária Brasileira v.52 n.11 2017
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| Direitos: |
info:eu-repo/semantics/openAccess
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