Modelos de regressão aleatória para avaliação da curva de crescimento em matrizes de codorna de corte

Teixeira, Bruno Bastos; Euclydes, Ricardo Frederico; Teixeira, Rafael Bastos; Silva, Luciano Pinheiro da Departamento de Zootecnia; Torres, Robledo de Almeida; Lehner, Helmut; Caetano, Giovani da Costa; Crispim, Aline Campores Departamento de Zootecnia

doi:10.1590/s0103-84782012000900020

Cited by 4 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The polynomial regression model presented high explanatory power (R² = 99.99%), low AIC = -24.68 and SSR = 2.5 and greater Willmott index (d = 0.9999) than the other models evaluated (Table 3). Similar results were found by Bonafé et al (2011) and Teixeira et al (2012a) who studied mating of cut quails belonging to the genetic groups UFV1 and UFV2.…”

Section: Resultssupporting

confidence: 89%

See 1 more Smart Citation

Adjusting weight growth curve of male quails <i>Coturnix japonica</i> reared in the semi-arid region of the State of Pernambuco

Lucena

Holanda

et al. 2018

Acta Sci. Anim. Sci.

View full text Add to dashboard Cite

This study adjusted different regression models to describe the growth pattern of meat quails from birth to 42 days of age. Data of 300 male quails were used. Weight and height information of all quails were collected weekly from the 1st to the 42nd day of age. Body weight of poultry was subjected to the polynomial, logistic, Gompertz, Weibull, and log-normal regression models. The criteria used to choose the best model to explain the growth curve of quails were the coefficient of determination of the model, Akaike’s information criterion, sum of squared residuals and Willmott’s index. For all the models used, the variables age and height were significant to explain the weight of quails. The polynomial (R² = 99.99%, AIC = 24.68, SSR = 27.5, d = 0.9999) and log-normal (R² = 99.60%, AIC = -17.5, SSR = 107.15, d = 0.9989) models presented the best fit criteria and were recommended to explain the growth of quails.

show abstract

Section: Resultssupporting

confidence: 89%

“…Drumond et al (2013) verified that the logistic and Gompertz models presented the best results to explain the growth of male and female quails. Bonafé et al (2011) and Teixeira et al (2012a) verified that the weight growth of quails can be explained by Legendre polynomial models.…”

Section: Introductionmentioning

confidence: 98%

Adjusting weight growth curve of male quails <i>Coturnix japonica</i> reared in the semi-arid region of the State of Pernambuco

Lucena

Holanda

et al. 2018

Acta Sci. Anim. Sci.

View full text Add to dashboard Cite

show abstract

“…Accordingly, Teixeira et al . (), when evaluating the growing curve of meat‐type quails from two strains (UFV1 and UFV2), concluded that models with heterogeneous residual variance with three and five classes were the most adequate to the UFV1 and UFV2, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Similarly, Assis et al (2006) found a better adjustment when using models with four residual variances' classes as these models were less parameterized. Accordingly, Teixeira et al (2012), when evaluating the growing curve of meat-type quails from two strains (UFV1 and UFV2), concluded that models with heterogeneous residual variance with three and five classes were the most adequate to the UFV1 and UFV2, respectively. For most carcass traits, genetic correlations between predicted breeding values at different nutritional environments were positive and high in both strains, except for BW at slaughter and breast weight for the LF2 strain, which presented values below 0.80, thus indicating the presence of G 9 E interaction (Figure 1).…”

Section: Resultsmentioning

confidence: 99%

Sensitivity of breeding values for carcass traits of meat‐type quail to changes in dietary (methionine + cystine):lysine ratio using reaction norm models

Miranda

Pires

Abreu

et al. 2016

J Animal Breeding Genetics

View full text Add to dashboard Cite

Our objective was to evaluate changes in breeding values for carcass traits of two meat-type quail (Coturnix coturnix) strains (LF1 and LF2) to changes in the dietary (methionine + cystine):lysine ([Met + Cys]:Lys) ratio due to genotype by environment (G × E) interaction via reaction norm. A total of 7000 records of carcass weight and yield were used for analyses. During the initial phase (from hatching to day 21), five diets with increasing (Met + Cys):Lys ratios (0.61, 0.66, 0.71, 0.76 and 0.81), containing 26.1% crude protein and 2900 kcal ME/kg, were evaluated. Analyses were performed using random regression models that included linear functions of sex (fixed effect) and breeding value (random effect) for carcass weight and yield, without and with heterogeneous residual variance adjustment. Both fixed and random effects were modelled using Legendre polynomials of second order. Genetic variance and heritability estimates were affected by both (Met + Cys):Lys ratio and strain. We observed that a G × E interaction was present, with changes in the breeding value ranking. Therefore, genetic evaluation for carcass traits should be performed under the same (Met + Cys):Lys ratio in which quails are raised.

show abstract

Modelos de regressão aleatória na seleção de codornas de corte para produção de ovos

Teixeira

Euclydes

Silva

et al. 2013

Pesq. agropec. bras.

Self Cite

View full text Add to dashboard Cite

Resumo -O objetivo deste trabalho foi avaliar modelos de regressão aleatória com diferentes ordens de polinômios de Legendre, quanto ao melhor ajuste para a produção de ovos de codornas de corte. Foram avaliados os grupos genéticos UFV1 e UFV2 de codornas de corte, de origens distintas, do programa de melhoramento genético da Universidade Federal de Viçosa. Determinou-se a produção semanal de ovos de 1.294 matrizes, da 6ª até a 57ª semana de idade, das quais 644 do grupo genético UFV1 e 650 do UFV2. Utilizou-se o modelo animal em regressão aleatória pelo programa Wombat e, para modelar as trajetórias das características com o tempo, aplicaram-se as funções polinomiais de Legendre. Foram feitas comparações pelo critério de informação de Akaike, critério de informação bayesiano de Schwarz, logaritmo da função de verossimilhança e teste da razão de verossimilhança. O modelo com K = 3, para efeitos fixos, K a = 4, para efeitos genéticos, e K c = 4, para efeito de ambiente, propicia melhor ajuste para ambas as linhagens, não provoca grandes alterações nos componentes de variância e fornece melhores estimativas de herdabilidade.Termos para indexação: Coturnix coturnix, herdabilidade, polinômios de Legendre, Wombat. Random regression models in the selection of meat-type quails for egg productionAbstract -The objective of this work was to evaluate random regression models with different orders of Legendre polynomials, as to the best fit for egg production of meat-type quails. UFV1 and UFV2 genetic groups of meat-type quails, from different origins, of the genetic breeding program of the Universidade Federal de Viçosa, Brazil, were evaluated. Egg production was determined weekly for 1,294 quails, from their 6 th to their 57 th week of age, of which 644 were from the genetic group UFV1, and 650 from UFV2. The animal model was used in random regression by Wombat software, and, for modeling variable trajectories in time, the Legendre's polynomial functions were applied. Comparisons were made by the Akaike's information criterion, the Bayesian information criterion of Schwarz, the logarithm of the likelihood function, and the likelihood ratio test. The model with K = 3, for fixed effects, K a = 4, for genetic effects, and K c = 4, for the effect of environment provides the best fit, do not causes major changes in the variance components, and provides better estimates of heritability.

show abstract

Modelos de regressão aleatória para avaliação da curva de crescimento em matrizes de codorna de corte

Abstract: 10, 70, 140, 210, 280, 350, 420, 770, 1120

Cited by 4 publications

References 8 publications

Adjusting weight growth curve of male quails <i>Coturnix japonica</i> reared in the semi-arid region of the State of Pernambuco

Adjusting weight growth curve of male quails <i>Coturnix japonica</i> reared in the semi-arid region of the State of Pernambuco

Sensitivity of breeding values for carcass traits of meat‐type quail to changes in dietary (methionine + cystine):lysine ratio using reaction norm models

Modelos de regressão aleatória na seleção de codornas de corte para produção de ovos

Contact Info

Product

Resources

About