Journal
POULTRY SCIENCE
Volume 98, Issue 8, Pages 3246-3256Publisher
OXFORD UNIV PRESS
DOI: 10.3382/ps/pez183
Keywords
feed efficiency; wooden breast; myopathy; glycogen; RNA-seq
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Funding
- Delaware Bioscience Center for Advanced Technology
- Agriculture and Food Research Initiative Competitive Grant from the USDA National Institute of Food and Agriculture [201667015-25027]
- Heritage Breeders, LLC
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This study was conducted to characterize metabolic differences between high feed efficiency (HFE) and low feed efficiency (LFE) chickens to investigate why feed efficient chickens are more susceptible to muscle abnormalities such as wooden breast disease. Gene expression profiles were generated by RNA sequencing of pectoralis major muscle samples from 10 HFE and 13 LFE broiler chickens selected from a modern broiler population. Metabolism-associated differentially expressed genes were identified and interpreted by Ingenuity Pathway Analysis and literature mining. Our RNA-seq data indicate decreased glycolytic capacity, increased fatty acid uptake, mitochondrial oxidation of fatty acids, and several other metabolic alterations in the pectoralis major muscle of HFE chickens. We also quantified glycogen content of the pectoralis major muscle and found that the HFE chickens had a significantly (P <= 0.05) lower glycogen content. Collectively, this study indicates extensive metabolic differences in the pectoralis major muscle between HFE and LFE chickens and helps identify metabolic features of susceptibility to muscle disorders in modern broiler chickens.
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