Сравнительная характеристика четырехглавой мышцы бедра в постнатальном онтогенезе у кур Кобб‑500 и Юрловская голосистая

Abstract

Histological and morphological characteristics of skeletal muscles in chickens of the meat productivity direction Cobb-500 and egg productivity direction Yurlovskaya golosistaya on the 8-th and 20-th days of postembryonic development were studied. The skeletal striated muscle tissue of the studied bird obeys the general principles of myogenesis inherent in most animal species and is characterized by signs of a definitive structure. It is shown that on the 8-th and 20-th days of postembryonic ontogenesis, the quadriceps femoral muscle of the Yurlovskaya golosistaya breed is ahead of the Cobb-500 cross in terms of the thickness of muscle fibers, while the opposite pattern is established in terms of the thickness of muscle fiber bundles, as well as endomysium and perimysium in the connective tissue component. The area of muscle tissue and the number of muscle fibers in the field of vision in the studied periods of ontogenesis prevail in digital values in Cobb-500 compared to the Yurlovskaya golosistaya. Based on the obtained morphometric parameters of muscle fibers, the concept of histogenesis of skeletal muscles in poultry of egg and meat productivity directions is presented.