Формирование поверхностной грудной мышцы и четырехглавой мышцы бедра у кур мясного направления продуктивности в эмбриогенезе

Abstract

Morphological and histological characteristics of the quadriceps femoral muscle and the superficial pectoral muscle in chickens of the meat productivity direction (Brama and Smena-8) on the 14th day of embryogenesis are shown. In the studied muscles, muscle fibers were identified, delimited by the endomysium and combined into bundles, between which the perimysium lies. There is no transverse striation in the muscle fibers. In the structure of the skeletal muscles of the Smena-8 cross, the division of muscle fibers into thin and thick is established. During the study, the thickness of muscle fibers and their bundles, as well as the thickness of the endomysium and perimysium were determined. According to all the studied micromorphometric indicators of the quadriceps femoral muscle and the superficial pectoral muscle, the superiority of the Smena-8 cross over the Brama breed was revealed. The presented results indicate the peculiarities of the formation of skeletal muscles on the 14th day of the embryonic period of development of the organism in chickens of the meat productivity direction, which allows using this information in predicting the productive qualities and genetic potential of crosses and breeds involved in breeding work, including in the comparative aspect. In addition, these data expand the concept of histogenesis of skeletal muscles in various representatives of poultry and can be basic in the issues of their assessment by morphological indicators in certain periods of life.