UDC 636.5: 611.73.013
DOI: 10.36871/vet.zoo.bio.202302008
Authors
Gleb V. Kondratov,
Viktor V. Stepanishin,
Stanislav G. Kumirov,
Moscow State Academy of Veterinary Medicine
and Biotechnology – MVA by K. I. Skryabin,
Moscow, Russian Federation
Abstract
The microstructural characteristics of the muscle tissue of the superficial pectoral muscle in 14 and 17-day-old embryos of Haysex white cross chickens are presented. The described stage of embryogenesis corresponds to the fetal period of embryo development, accompanied by active growth of internal organs while maintaining allantoid respiration. Studies have shown that the thickness of bundles of muscle fibers and perimysium during embryogenesis (from 14 to 17 days) increases while the thickness (diameter) of muscle fibers and the thickness of the endomysium decrease. The area of muscle tissue significantly increases in relation to connective tissue (from 41% to 62%). The results obtained indicate the peculiarities of the formation of skeletal muscles on the 14th and 17th days of embryogenesis in chickens of the egg direction of the productivity of the Haysex white cross, which can be the basis for the formation of a descriptive characteristic of the cross and serve as a criterion for the prognostic assessment of the productive potential of the bird. When conducting scientific research using chickens of various productivity directions, this information can serve as a differential for determining the distinctive features of crosses and breeds in certain periods of embryogenesis for improving breeding and genetic technologies in poultry farming.
Keywords
chickens, skeletal muscles, embryogenesis, muscle fibers, endomysium, perimysium, Hysex white, superficial pectoral muscle.
