Authors:
U. V. KHOMPODOEVA, candidate of agricultural sciences, senior researcher, laboratory of productive horse breeding technology,
R. V. IVANOV, doctor of agricultural sciences, deputy director for science, head of the laboratory of productive horse breeding technology,
V. A. BAGIROV, doctor of biological sciences, corresponding member of the Russian Academy of Sciences, director of the Department of Coordination of Activity of Organizations in the Field of Agricultural Sciences,
Yakut Scientific Research Institute of Agriculture (23/1 Bestuzheva-Marlinskogo Str., 67700, Yakutsk, phone 8 (4112) 21-45-74, email: This email address is being protected from spambots. You need JavaScript enabled to view it.),
Ministry of Acience and Higher Education of the Russian Federation (14, building 3 Solyanka Str., 109992, Moscow, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.).
Abstract. On young growth of sheep of four pedigree groups age variability of some economic and usefulsigns characterizing weight and linear growth is studied. It is established that among the compared pedigree groups of lambs on live weight the lambs received from crossing of zabaikal sheep with archar×chubuku×romanov ram had advantage. The coefficients of variation in body weight within breed groups are relatively low and the variation curves were uniform in nature. The reliable superiority over identified archar×chubuku×romanov and buubey×archar×chubuku×romanov lambs. So, at 6 months of age the live weight was zabajkale×archar×chubuku×romanov lambs made up 33,67 ± 0,27 kg, which is 8.5 % more archar×chubuku×romanov (31,01±0,34) and 6.3 % above buuba×arkhar×the shank×romanov (of 31, 66 ± 0,53) lambs (P ≥ 0,99). At the same time, the highest coefficient of variability was observed during the early period of individual development that indicates great opportunities for increase in live weight in the course of carrying out selection work. It was found that the phenotypic differences of measurements of the coefficient of variation in sheep hybrid calves were expressed in the manifestation of genetic predisposi- tion in the general economic conditions of feeding and housing. Breed characteristics to a lesser extent affected the variability of the studied traits. The greatest uniformity on the General features of the variability of the measurements differed lambs I control (archar×chubuku×romanov) and I pilot (buubey×archar×chubuku×romanov) group. A similar pattern of variability of the main measurements were observed on the lambs II the control (zabajkale) and II experimental (zabajkale×archar×chubuk u×romanov) groups. The established regularities of age variability of the main selected traits can undoubtedly be used in the practical selection of sheep.
Keywords: the coefficient of variation, body weight, measurements, archar×chubuku×romanov (ACHR) lambs, buubey×archar×chubuku×romanov (BACHR) lambs, zabaikal (ZAB)lambs, zabaikal×archar×chubuku×romanov (ZACHR) lambs.
