Genotype×dietary (methionine+cystine):Lysine ratio interaction for body weight of meat-type quails using reaction norm models

Mota, Lúcio Flávio Macêdo; Abreu, Luíza Rodrigues Alves; Silva, Martinho A.; Pires, A. V.; Lima, Heder José D’Ávila; Bonafé, Cristina Moreira; Costa, Leonardo Silva da; Souza, Karine Aparecida Rodrigues de; Martins, P. G. M. A.

doi:10.1016/j.livsci.2015.11.006

Cited by 15 publications

(11 citation statements)

References 13 publications

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“…These diets were calculated having 3% more amino acids (except for [Met + Cys]:Lys) to assure no deficiencies. Nutrient composition of these diets provided from hatching to 21 days of age and from day 21 to 35 was identical to what previously reported by Mota et al (2015). Diets and water were provided ad libitum.…”

Section: Animals Management and Dietsmentioning

confidence: 83%

“…The model used by Mota et al (2015) for BW was adapted in the analyses to account for heterogeneous residual variance. Thus, a single-trait animal model, which included sex as fixed effect, (Met + Cys):Lys ratio as the control variable and breeding values of quails (direct additive) as the random effect, was used for the analysis of the evaluated traits.…”

Section: Discussionmentioning

confidence: 99%

“…Strains’ information was previously described by Mota et al . (). Briefly, the LF1 strain was derived from a commercial flock; from the original flock, 200 sires and 400 dams (the heaviest quails) were selected and randomly mated for three generations.…”

Section: Methodsmentioning

confidence: 97%

“…Nutrient composition of these diets provided from hatching to 21 days of age and from day 21 to 35 was identical to what previously reported by Mota et al . (). Diets and water were provided ad libitum .…”

Section: Methodsmentioning

confidence: 97%

“…Offspring of both strains, each one derived from 80 sires and 160 dams of the respective strain, belonging to the Quail Breeding Program of the UFVJM Department of Animal Sciences, were randomly distributed across five 6.0 m 2 aviaries, all located in a covered barn, with wood shavings litter. Strains' information was previously described by Mota et al (2015). Briefly, the LF1 strain was derived from a commercial flock; from the original flock, 200 sires and 400 dams (the heaviest quails) were selected and randomly mated for three generations.…”

Section: Animals Management and Dietsmentioning

confidence: 99%

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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

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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.

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Section: Animals Management and Dietsmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 97%

Section: Animals Management and Dietsmentioning

confidence: 99%

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