Related Experiment Videos
Breast muscle development in commercial broiler chickens
G N Scheuermann1, S F Bilgili, J B Hess
1Embrapa Suinos e Aves, Concordia, SC, Brazil, CEP:89700-000.
Poultry Science
|November 7, 2003
Summary
Broiler chicken breast yield varies by genetics and sex, influenced by muscle cell differences. Males exhibit distinct growth patterns and higher myofiber density than females, impacting muscle development.
Area of Science:
- Poultry Science
- Animal Genetics
- Muscle Biology
Background:
- Broiler chicken breast muscle yield is crucial for meat production.
- Genetic and gender-related variations in muscle yield are linked to myofiber characteristics.
Purpose of the Study:
- To investigate genetic and gender differences in broiler breast muscle yield.
- To analyze growth curves, breast fillet dimensions, and myofiber density (MFD) across commercial strain crosses (SC).
Main Methods:
- Comparative analysis of body weight and breast muscle development in male and female broilers from eight SC up to 56 days of age.
- Gompertz function adjustment for growth curve analysis.
- Assessment of breast fillet dimensions and myofiber density (MFD) at specific ages.
Main Results:
- Significant differences in body weight, breast weight, yield, and fillet dimensions were observed among SC.
- Male and female broilers displayed distinct growth curves, with males maturing later.
- Breast depth showed the strongest positive correlation with breast yield; males had higher MFD than females, though SC differences were not explained by MFD.
Conclusions:
- Broiler strain crosses and sex significantly impact growth dynamics and breast muscle development.
- Myofiber density (MFD) differs between sexes, with males showing higher density, potentially influencing total myofiber number.
- Breast depth is a key indicator of breast yield in broilers.