::INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES::

CODEN : IAJPBB
issn 2349-7750

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TITLE:

THE PATTERNS OF LINEAR SKELETAL GROWTH OF THE CROSSBRED SHEEP

AUTHORS:

Oleg K. Gogaev, Alan A. Abaev, lbina R. Demurova

ABSTRACT:

While creating crossbred sheep breeding, a large number of breeds and pedigrees of stud rams and females were used, which then needed a complex evaluation of morpho-biological features. To investigate this issue, sheep lambs were produced from crossing stud rams of Romney Marsh breed, North-Caucasian meat-wool breed and Precoce with fine-wooled and coarse-wooled females in the conditions of the distant pasture and mountain husbandry of the North Caucasus, from 2008 to 2016. Five rams from each group at the age of 4, 8, 13 and 18 months were butchered. It was found that the growth rate of calvaria after birth is lower than in the spine, as a result of this the relative length of the calvaria in comparison with the newborn decreased on average by 3.67%, and the spine, on the contrary, increased by same value. In the postembryonic period, the calvaria developed more intensively in length than in the depth, and the width of angle in the jaw took the first place by the intensity of growth, then the height of the angle and length. During 18 months of life of the experimental youngsters, the mass of the spine and its sections increased by an average of 8.22 - 9.20, and the increase of length was from 2.32 to 2.69. In the embryonic period, the spine more intensively developed in length than in the mass, and at the birth moment it was 37.1 - 43.1% of the length spine of 18 months age. Keywords: hybrids, crossbreeds, skeleton, calvarias, embryonic period, spine, postembryonic period.