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All Journal Tropical Animal Science Journal
Pereira, M. F. C.
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Agriculture, Biological Sciences & Forestry Energy

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Improving Meat Quality and Reducing Breast of Myopathies in Broiler Chickens Subjected to Cyclic Heat Stress by Supplementing of Chromium-Methionine Tesser, G. L. S.; Rohloff Junior, N.; Andrade, T. S.; Kaufmann, C.; Costa, A. P. G. C.; Pereira, M. F. C.; Calderano, A. A.; Dadólio, F. S.; Klosowski, E. S.; Eyng, C.; Nunes, R. V.
Tropical Animal Science Journal Vol. 48 No. 1 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.1.27

Abstract

Chromium-methionine (CrMet) provides essential nutrients and bioactive compounds that may enhance meat quality and reduce stress-related issues in broiler chicken. This study aimed to evaluate the effects of chromium-methionine on carcass yield, relative weights of the liver and fat pad, incidence and severity of myopathies, muscle color quantification, water-holding capacity, cooking loss, shear force, lipid peroxidation in breast muscle, and composition of breast meat in broiler chickens subjected to cyclic heat stress. A total of 1,000 one-day-old male Cobb 500 broiler chickens were divided into 10 replicate pens with 20 birds each, following a completely randomized design with five doses of dietary treatments (0; 0.25; 0.50; 1.0; and 2.0 mg CrMet kg-1 diet). Experimental broiler chickens were kept in thermoneutral conditions for 21 days, then subjected to cyclic heat stress (31.1 °C and 60.2% humidity) from 09:00 am to 03:00 pm until 42 days of age. Statistical analysis included Tukey’s test and regression analysis. Myopathy scores were assessed using the Kruskal-Wallis test and Dunn’s test, all at a significant level of 5%. Inclusion of 0.50 and 1.0 mg CrMet reduced woody breast severity scores. At 15 minutes postmortem, birds fed 0.50 mg CrMet had less redness (a*) than controls and birds fed 2.0 mg CrMet; birds fed 2.0 mg CrMet had lower lightness (L*) than those fed 0.25 and 1.0 mg CrMet. Lipid peroxidation was lower in birds fed 0.50 mg CrMet at 60 days compared to control. Crude fat was lower in birds fed 1.0 mg CrMet. Chromium-methionine supplementation at 0.50 and 1.0 mg/kg diet improved meat quality and reduced woody breast in broiler chickens.
1,25-Dihydroxycholecalciferol Glycoside (1,25(OH)2D3-G) in Broiler Breeder Diets and Its Influence on Broiler Chicken Growth Andrade, T. S.; Rohloff Junior, N.; Bebber, B. A.; Pereira, M. F. C.; Maia, M. L. R.; Tesser, G. L. S.; Calderano, A. A.; Vieira, B. S.; Vargas Junior, J. G.; Eyng, C.; Nunes, R. V.
Tropical Animal Science Journal Vol. 48 No. 4 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.4.315

Abstract

This study aimed to investigate the effects of 1,25-Dihydroxycholecalciferol glycoside (1,25(OH)2D3-G) supplementation on performance, carcass yield, carcass cuts, intestinal histomorphometry, bone health, and gene expression in broiler chickens from broiler breeders. A total of 1,152 one-day-old male Ross 308 AP chicks were distributed in a completely randomized design with a 2 x 3 factorial arrangement. One of the experimental factors was the presence or absence of 1,25(OH)2D3-G (0 or 100 mg/kg) in the diets of broiler breeders between 21 and 30 weeks of age. The second experimental factor consisted of three levels of 1,25(OH)2D3-G supplementation (0, 50, and 100 mg/kg) in the broiler chicken diets from day 1 to day 21, followed by a standard commercial diet from day 22 to day 42. The study totaled six treatments with eight replicates and 24 birds per experimental unit. Performance, carcass and cut yields, as well as tibial breaking strength and composition, were evaluated in broiler chickens at 21 and 42 days. Intestinal histomorphometry and gene expression were assessed at 21 days, while tibial dyschondroplasia was analyzed at 42 days. Broiler chickens from broiler breeders supplemented with 100 mg/kg of 1,25(OH)2D3-G showed higher hatch weight, better feed conversion, improved intestinal morphology, and greater carcass yield. However, this supplementation did not enhance calcium and phosphorus deposition in the tibia, resulting in reduced bone strength. It is concluded that broiler chickens from broiler breeders supplemented with 100 mg/kg of 1,25(OH)2D3-G show better growth performance at 21 and 42 days.
Co-Authors Andrade, T. S. Bebber, B. A. Calderano, A. A. Costa, A. P. G. C. Dadólio, F. S. Eyng, C. Kaufmann, C. Klosowski, E. S. Maia, M. L. R. Nunes, R. V. Rohloff Junior, N. Tesser, G. L. S. Vargas Junior, J. G. Vieira, B. S.