| Registro completo |
| Provedor de dados: |
PAB
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| País: |
Brazil
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| Título: |
Degree of multicollinearity and variables involved in linear dependence in additive-dominant models
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| Autores: |
Petrini,Juliana
Dias,Raphael Antonio Prado
Pertile,Simone Fernanda Nedel
Eler,Joanir Pereira
Ferraz,José Bento Sterman
Mourão,Gerson Barreto
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| Data: |
2012-12-01
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| Ano: |
2012
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| Palavras-chave: |
Bos taurus x Bos indicus
Animal breeding
Beef cattle
Correlation matrix
Crossbreeding
Variance inflation factor
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| Resumo: |
The objective of this work was to assess the degree of multicollinearity and to identify the variables involved in linear dependence relations in additive-dominant models. Data of birth weight (n=141,567), yearling weight (n=58,124), and scrotal circumference (n=20,371) of Montana Tropical composite cattle were used. Diagnosis of multicollinearity was based on the variance inflation factor (VIF) and on the evaluation of the condition indexes and eigenvalues from the correlation matrix among explanatory variables. The first model studied (RM) included the fixed effect of dam age class at calving and the covariates associated to the direct and maternal additive and non-additive effects. The second model (R) included all the effects of the RM model except the maternal additive effects. Multicollinearity was detected in both models for all traits considered, with VIF values of 1.03 - 70.20 for RM and 1.03 - 60.70 for R. Collinearity increased with the increase of variables in the model and the decrease in the number of observations, and it was classified as weak, with condition index values between 10.00 and 26.77. In general, the variables associated with additive and non-additive effects were involved in multicollinearity, partially due to the natural connection between these covariables as fractions of the biological types in breed composition.
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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=S0100-204X2012001200010
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| Editor: |
Embrapa Secretaria de Pesquisa e Desenvolvimento
Pesquisa Agropecuária Brasileira
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| Relação: |
10.1590/S0100-204X2012001200010
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| Formato: |
text/html
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| Fonte: |
Pesquisa Agropecuária Brasileira v.47 n.12 2012
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| Direitos: |
info:eu-repo/semantics/openAccess
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