Allometric coefficient in broilers and development of white striping and wooden breast myopathies

Fernando Alberto Benitez dos Santos, Claudia Marie Komiyama, Vivian Aparecida Rios de Castilho Heiss, Maria Fernanda Castro Burbarelli, Rodrigo Garófallo Garcia, Deivid Kelly Barbosa, Bruna Barreto Przybulinski, Leonardo de Oliveira Seno, Andrey Sávio de Almeida Assunção and Erika Rosendo de Sena Gandra
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Fernando Alberto Benitez dos Santos: Federal University of Grande Dourados - UFGD - Dourados, Mato Grosso do Sul, Brazil
Claudia Marie Komiyama: Federal University of Grande Dourados - UFGD - Dourados, Mato Grosso do Sul, Brazil
Vivian Aparecida Rios de Castilho Heiss: Federal University of Grande Dourados - UFGD - Dourados, Mato Grosso do Sul, Brazil
Maria Fernanda Castro Burbarelli: Federal University of Grande Dourados - UFGD - Dourados, Mato Grosso do Sul, Brazil
Rodrigo Garófallo Garcia: Federal University of Grande Dourados - UFGD - Dourados, Mato Grosso do Sul, Brazil
Deivid Kelly Barbosa: Federal University of Grande Dourados - UFGD - Dourados, Mato Grosso do Sul, Brazil
Bruna Barreto Przybulinski: Federal University of Grande Dourados - UFGD - Dourados, Mato Grosso do Sul, Brazil
Leonardo de Oliveira Seno: Federal University of Grande Dourados - UFGD - Dourados, Mato Grosso do Sul, Brazil
Andrey Sávio de Almeida Assunção: São Paulo State University - UNESP - Botucatu, São Paulo, Brazil
Erika Rosendo de Sena Gandra: Studies Institute of Trópico Úmido - UNIFESSPA - Xinguara, Pará, Brazil

Czech Journal of Animal Science, 2023, vol. 68, issue 5, 212-221

Abstract: The aim was to study the evolution and severity of white striping and wooden breast myopathies and to carry out a study on the parameters of meat quality and allometric growth of male and female broilers at different ages. The experiment was conducted in a broiler house in a completely randomized design, using 960 one-day-old chicks of the Cobb® strain, with 480 chicks of each sex. 96 birds per treatment were slaughtered weekly at the age of 21 to 49 days. The present study analyses the occurrence of myopathies, their scores, and their evolution over the age of the birds, comparing males and females. Further assessments included the allometric coefficient and meat quality analyses such as physical measurements (breast length, width, and thickness), pH, colour (L*, a*, and b*), drip loss, water-holding capacity, cooking loss, and shear force. The results demonstrate that the sex of birds did not affect the occurrence of white striping and wooden breast myopathies. However, the degree of myopathies evolved with advancing age, suggesting the weight as a predisposing factor for these myopathies. The emergence of white striping myopathy occurred as early as in the third week of the birds' life. Wooden breast did not develop as isolated myopathy, occurring only in the concomitant presence of white striping. The allometric coefficient demonstrated that regardless of the sex and age, broiler breast had positive heterogonic growth, i.e. late growth in relation to the other parts of the body.

Keywords: muscle degeneration; study of relative growth; pectoral myopathy; meat quality (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjs:v:68:y:2023:i:5:id:182-2022-cjas

DOI: 10.17221/182/2022-CJAS

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