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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Methionine to cystine ratio in the total sulfur amino acid requirements and sulfur amino acid metabolism using labelled amino acid approach for broilers

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Pacheco, Leticia G. [1] ; Sakomura, Nilva K. [1] ; Suzuki, Rafael M. [1] ; Dorigam, Juliano C. P. [2] ; Viana, Gabriel S. [1] ; Van Milgen, Jaap [3] ; Denadai, Juliana C. [4]
Total Authors: 7
[1] UNESP, Dept Anim Sci, Jaboticabal, SP - Brazil
[2] Evon Nutr & Care GmbH, Hanau - Germany
[3] Agrocampus Ouest, INRA, Rennes - France
[4] UNESP, Dept Anim Sci, Botucatu, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: BMC Veterinary Research; v. 14, NOV 22 2018.
Web of Science Citations: 2

BackgroundAssuming that part of Methionine (Met) is converted into Cystine (Cys), but ignoring the rates with which such phenomenon occurs may lead to an excessive supply of Met in poultry diets. Such inconvenient could be easily avoided with the knowledge of the ideal Met:Cys/Total sulfur amino acids (TSAA) ratio and the rates of Met conversion into Cys.ResultsMet sources did not affect performance. Met:Cys/TSAA ideal ratio was determined using curvilinear-plateau regression model. Both optimum body weight gain and feed conversion ratio were estimated in 1007g/day and 1.49, respectively, at 52% Met/TSAA ratio. Feed intake was not affected by Met:Cys/TSAA ratios. In the labelled amino acid assay, the rates with which Met was converted into Cys ranged from 27 to 43% in response to changes in Met:Cys/TSAA ratios, being higher at 56:44.ConclusionBased on performance outcomes, the minimum concentration of Met relative to Cys in diets for broilers from 14 to 28 d of age based on a TSAA basis, is 52% (52:48 Met:Cys/TSAA). The outcomes from labelled amino acid assay indicate that highest the Met supply in diets, the highest is its conversion into Cys. (AU)

FAPESP's process: 15/25717-0 - Efficiency and incorporation of nitrogenous compounds from L- (15N) methionine on the growth of broiler chickens
Grantee:Letícia Graziele Pacheco
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 13/25761-4 - Modeling production and nutritional requirements of poultry and fish
Grantee:Nilva Kazue Sakomura
Support Opportunities: Research Projects - Thematic Grants