Abstract
A comprehensive comparative microscopic and morphometric study of the superficial pectoral (SPM) and quadriceps femoral (QFM) muscles in hens and quails in the early stages after hatching was performed. In the muscles, diameter of the muscle fiber, area of the muscle tissue, representation of the muscle and connective tissue components were determined. A set of general regularities and specific features of postembryonic myogenesis of the studied structures in hens and quails has been established. The peculiarities of SPM and QFM ultrastructure in quails of the Manchzhurskaya zolotistaya (Manchurian gold) breed were revealed. Representatives of both studied groups of birds are characterized by an increase in the muscle tissue area, the diameter of muscle fibers and their bundles. The difference is a more significant development of the quadriceps femoris in hens, and the superficial pectoral muscle in quails. It was found that quails, unlike hens, had thickening of the endomysium and perimysium in both muscles.
Highlights
Poultry farming is an actively developing branch of agriculture
In hen chickens and quails, morphometric studies of muscle fibers were performed in terms of thickness, their bundles, endomysium, perimysium, and the ratio of muscle and connective tissues at all stages of myohistogenesis in SPM and quadriceps femoral (QFM)
Connective tissue in this period of life is abundantly represented in the muscle, while the endomysium forms thin layers, and the paratenon, on the contrary, very wide layers of loose connective tissue (Figure 1)
Summary
Poultry farming is an actively developing branch of agriculture. The quail farming industry is a promising direction in agriculture, due to the fact that this type of poultry is characterized by a set of important criteria for productivity and profitability of cultivation technology [1, 9]. First of all, this concerns the speed of growth processes, which are 5 times higher than similar indicators in broiler chickens, while it is worth noting that the earlier period of the egg laying onset.
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