| Registro completo |
| Provedor de dados: |
PAB
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| País: |
Brazil
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| Título: |
Genetic improvement and population structure of the Nelore breed in Northern Brazil
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| Autores: |
Malhado,Carlos Henrique Mendes
Carneiro,Paulo Luiz Souza
Malhado,Ana Claudia Mendes
Martins Filho,Raimundo
Bozzi,Riccardo
Ladle,Richard James
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| Data: |
2010-10-01
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| Ano: |
2010
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| Palavras-chave: |
Bos taurus indicus
Effective population size
Genetic parameters
Genetic trends
Inbreeding
Pedigree analysis
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| Resumo: |
The objective of this work was to evaluate the population structure and the genetic and phenotypic progress of Nelore cattle in Northern Brazil. Pedigree information concerning animals born between 1942 and 2006 were analyzed. Population structure was performed using the Endog program. Out of the 140,628 animals studied, 67.7, 14.52 and 3.18% had complete pedigree record of the first, second and third parental generation, respectively. Inbreeding and average relatedness coefficients were low: 0.2 and 0.13%, respectively. However, these parameters may have been underestimated, since information on pedigree was incomplete. The effective number of founders was 370 and the genetic contribution of 10, 50 and 448 most influent ancestors explained 13.2, 28 and 50% of the genetic variability in the population, respectively. The genetic variability for growth traits and population structure demonstrates high probability of increasing productivity through selective breeding. Moreover, management strategies to reduce the currently observed age at first calving and generation intervals are important for Nelore cattle genetic improvement.
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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=S0100-204X2010001000009
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| Editor: |
Embrapa Secretaria de Pesquisa e Desenvolvimento
Pesquisa Agropecuária Brasileira
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| Relação: |
10.1590/S0100-204X2010001000009
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| Formato: |
text/html
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| Fonte: |
Pesquisa Agropecuária Brasileira v.45 n.10 2010
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| Direitos: |
info:eu-repo/semantics/openAccess
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