Nutritional requirement of digestible threonine for white egg layers of 60 to 76 weeks of age

Cardoso, Anilma Sampaio; Costa, Fernando Guilherme Perazzo; Lima, Matheus Ramalho de; Nogueira, Eduardo Terra; Santos, Clariana Silva; Sousa, Rafael Barboza de; Lima, Renata de; Vieira, Danilo Vargas Gonçalves

doi:10.3382/japr.2014-01011

Cited by 10 publications

(14 citation statements)

References 11 publications

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“…The albumen percentage increased (linear, P = 0.05) with the dietary Thr concentration in the yellow-feathered chicken breeder hens. Cardoso et al (2014) and Azzam et al (2017) found that dietary Thr supplementation had no effects on the egg quality in laying hens, but Azzam et al (2014) found that the addition of dietary Thr (from 56 to 64 wk of age) increased the Haugh units and albumen height in laying hens. Furthermore, Fouad et al.…”

Section: Resultsmentioning

confidence: 99%

Effects of dietary threonine supplementation on productivity and expression of genes related to protein deposition and amino acid transportation in breeder hens of yellow-feathered chicken and their offspring

et al. 2019

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This study investigated the effects of the dietary threonine (Thr) levels on the performance, offspring traits, embryo amino acid transportation, and protein deposition in breeder hens of yellow-feathered chickens. In total, 720 breeder hens of Lingnan yellow-feathered chickens were randomly assigned to 1 of 6 dietary treatments, with 6 replicates per treatment (20 birds per replicate). The breeder hens were fed either basal diet (Thr = 0.38%) or basal diet supplemented with 0.12, 0.24, 0.36, 0.48, or 0.60% Thr from 197 to 266 D. There was a positive response in terms of the laying rate after adding different levels of Thr to the diet, but no significant effects on the average daily gain, average daily egg weight, feed conversion ratio, average broken eggs, and unqualified egg rate (P > 0.05). However, the eggshell strength and eggshell percentage decreased in a linear manner as the dietary Thr concentration increased (P = 0.05). Dietary supplementation with Thr had significant effects on the expression of mucin 2 (MUC2) in the uterus and zonula occludens protein 1 (ZO-1) in the duodenum of breeders (P < 0.05). In chick embryos at embryonic age 18 D, significant upregulation of poultry target of rapamycin (pTOR) occurred in the liver and breast muscle, as well as threonine dehydrogenase (TDH) in the thigh, and aminopeptidase (ANPEP) (P < 0.05) in the duodenum and ileum due to dietary Thr supplementation, but there were no effects on MUC2 expression in the duodenum and ileum (P > 0.05). The livability of the progeny broilers tended to increase with the dietary Thr concentration (quadratic, P = 0.08). Thus, dietary supplementation with Thr had positive effects on the laying production by breeder hens and offspring performance, and it also regulated the expression levels of genes related to amino acid transportation and protein deposition. The optimal dietary Thr concentration that maximized the laying rate in yellow-feathered chicken breeders aged 197 to 266 D was 0.68% according to quadratic regression analysis.

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Section: Resultsmentioning

confidence: 99%

Effects of dietary threonine supplementation on productivity and expression of genes related to protein deposition and amino acid transportation in breeder hens of yellow-feathered chicken and their offspring

et al. 2019

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“…Gomez and Angeles [24] observed that increasing the Thr level from 0.42% to 0.48% improved the FCR in laying hens during the second cycle of production. Cardoso et al [19] recommended increasing the Thr level from 0.523% to 0.567% to enhance egg production, the egg mass, and FCR in White Leghorn from 60 to 76 wk of age. In addition, recent studies by Azzam et al [16,17] detected significant improvements in egg production when the Thr level increased from 0.47% to 0.67% from 40 to 48 wk of age, while increasing the Thr level from 0.57% to 0.74% from 56 to 64 wk improved egg production and the egg mass in laying hens.…”

Section: Resultsmentioning

confidence: 99%

“…Gomez and Angeles [24] reported that increasing the Thr level from 0.42% to 0.54% had no effects on the albumen or yolk proportions, but the egg shell percentage declined as the dietary Thr level increased when continued for 6 wks during the second cycle in laying hens. Cardoso et al [19] found that feeding white laying hens a diet containing 0.523%, 0.546%, 0.569%, 0.592%, or 0.615% Thr for 17 wk during the late laying period had no effects on the egg quality, including the eggshell thickness, albumen, and yolk proportion. Azzam et al [16] found that increasing the Thr level from 0.47% to 0.87% in laying hens aged 40 wk during the summer season for 8 wk had no effect on the Haugh unit score, yolk color, eggshell thickness, or strength.…”

Section: Resultsmentioning

confidence: 99%

“…In broiler chickens and quails, increasing the Thr levels during embryonic development improves the growth performance, mucin secretion, and the humoral immune response after hatching and feeding the supplemented diet [10–12]. In laying hens, dietary supplementation with L-Thr enhances egg production, the egg weight, feed conversion ratio (FCR), and antibody production during different phases of production and at different ambient temperature ranges [13–19]. However, to the best of our knowledge, no previous study has estimated the Thr requirements for laying ducks, and thus the Thr requirements for laying ducks are not available in the NRC [20].…”

Section: Introductionmentioning

confidence: 99%

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Estimation of L-threonine requirements for Longyan laying ducks

Fouad

Zhang

Chen

et al. 2016

Asian-Australas J Anim Sci

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ObjectiveA study was conducted to test six threonine (Thr) levels (0.39%, 0.44%, 0.49%, 0.54%, 0.59%, and 0.64%) to estimate the optimal dietary Thr requirements for Longyan laying ducks from 17 to 45 wk of age.MethodsNine hundred Longyan ducks aged 17 wk were assigned randomly to the six dietary treatments, where each treatment comprised six replicate pens with 25 ducks per pen.ResultsIncreasing the Thr level enhanced egg production, egg weight, egg mass, and the feed conversion ratio (FCR) (linearly or quadratically; p<0.05). The Haugh unit score, yolk color, albumen height, and the weight, percentage, thickness, and breaking strength of the eggshell did not response to increases in the Thr levels, but the albumen weight and its proportion increased significantly (p<0.05), whereas the yolk weight and its proportion decreased significantly as the Thr levels increased.ConclusionAccording to a regression model, the optimal Thr requirement for egg production, egg mass, and FCR in Longyan ducks is 0.57%, while 0.58% is the optimal level for egg weight from 17 to 45 wk of age.

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“…However, the relative weight of quail eggs is higher, and may reach 10% of body weight. The weight of eggs of quails has a mean value of 12 g [17][18][19][20] and eggs of laying hens around 65 g [21][22][23][24].…”

Section: Peculiaritiesmentioning

confidence: 99%

Amino Acid for Japanese Quails: Methodologies and Nutritional Requirement

Vieira¹,

Costa²,

Lima³

et al. 2017

Amino Acid - New Insights and Roles in Plant and Animal

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The methodologies applied to chickens and laying hens, to determine the digestibility and requirement of protein and amino acids are used with quails, however, they need a more careful evaluation due to peculiarities inherent to the Coturnix genus, in order to provide consistent results. The nutritional requirements of the birds are determinate using the dose-response and the factorial method. Several mathematical models and techniques of diet formulation are allied to the dose-response method in determining nutritional requirements. The curvilinear (hyperbolic) models beter portray population behaviour in response to increasing nutrient doses in diets. The reading model, allow a beter estimation of the requirement, in relation to the mathematical models used in the dose-response method. The techniques of comparative slaughter and nitrogen balance are efective in determining the nutritional requirements of quails, however, the later need to be corrected by the loss of nitrogen in the feathers in determining the requirements of crude protein and amino acids for maintenance. The protein-free diet, coupled with the industrial amino acid supplementation, provides more robust digestibility values, since it more efectively predicts the endogenous excretion patern.

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Nutritional requirement of digestible threonine for white egg layers of 60 to 76 weeks of age

Cited by 10 publications

References 11 publications

Effects of dietary threonine supplementation on productivity and expression of genes related to protein deposition and amino acid transportation in breeder hens of yellow-feathered chicken and their offspring

Effects of dietary threonine supplementation on productivity and expression of genes related to protein deposition and amino acid transportation in breeder hens of yellow-feathered chicken and their offspring

Estimation of L-threonine requirements for Longyan laying ducks

Amino Acid for Japanese Quails: Methodologies and Nutritional Requirement

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