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Genetic evaluation of European quails by random regression models R. Bras. Zootec.
Gonçalves,Flaviana Miranda; Pires,Aldrin Vieira; Pereira,Idalmo Garcia; Drumond,Eduardo Silva Cordeiro; Felipe,Vivian Paula Silva; Pinheiro,Sandra Regina Freitas.
The objective of this study was to compare different random regression models, defined from different classes of heterogeneity of variance combined with different Legendre polynomial orders for the estimate of (co)variance of quails. The data came from 28,076 observations of 4,507 female meat quails of the LF1 lineage. Quail body weights were determined at birth and 1, 14, 21, 28, 35 and 42 days of age. Six different classes of residual variance were fitted to Legendre polynomial functions (orders ranging from 2 to 6) to determine which model had the best fit to describe the (co)variance structures as a function of time. According to the evaluated criteria (AIC, BIC and LRT), the model with six classes of residual variances and of sixth-order Legendre...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coturnix coturnix coturnix; Genetic parameters; Heterogeneity of variance.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900006
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