Influence of selection for breast muscle mass on pH and metabolism of supracoracoideus muscle from male and female turkey

The objective of this study was to determine if selection for increased breast muscle mass has affected the supracoracoideus muscle's ability to regulate pH during physical activity in turkeys. The lightweight male line (LM) had the greatest breast muscle mass as a percent of body weight (p < 0.0001), a lower average pH (6.68; p < 0.0001), and greater Lactate Dehydrogenase (293 mmol NADH min-1mug-1 ; p < 0.0001) and Glyceraldehyde Phosphate Dehydrogenase (0.4452 mmol NADH min-1mug-1; p < 0.05) activities than the HM and FL lines. The LM line had the highest ratio (2.33:1) (p < 0.05) of adult to neonatal myosin. Hens had greater breast muscle mass as a percent of body weight than males (p < 0.0001), and a lower average pH (6.62; p < 0.05). This study showed that genetic selection for breast muscle mass resulted in an increased ratio of adult to neonatal myosin and an increased anaerobic capacity, which may predispose birds to a lower ultimate pH during physical activity.

Name thesis:degree_name

MS

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Animal and Nutritional Sciences

Year dc:date.available

1999

Author dc:creator

• Yost, John Kenneth

Contributors dc:contributor

• P. Brett Kenney.

• Animal Physiology
• Biochemistry

Identifier

https://researchrepository.wvu.edu/etd/1000

OAI identifier oai:identifier

oai:researchrepository.wvu.edu:etd-2003