PRODUCTIVE QUALITIES OF CROSS-BRED SEMI-COARSE WOOL SHEEP

The article presents the results of studying productive qualities of young semi-coarse wool sheep during growth period, from birth to 18 months of age, depending on their origin. The study was carried out in Trans-Baikal Territory, in the pedigree breeding unit. Three groups of experimental animals were under study. The control group consisted of young pure-bred semi-coarse wool Aginskaya breed, the first experimental group consisted of the second generation hybrids of Kazakh semi-coarse wool breed, obtained from breeding within its type, and the second group consisted of the second generation crossbred young sheep of Aginskaya breed, obtained from breeding within its type. It was established that sheep of the second experimental group have advantage in terms of growth, development and slaughtering qualities over the pure-bred analogues of the Aginskaya breed and the animals of the first group. At the age of 18 months, rams of the second group also showed a significant advantage in the average live weight over the analogues from the control group and the first group, by 7.1 and 10.1%, respectively. In ewes, significant superiority in body weight over peers was established at the age of 12 months, by 6.2% and 9.5% respectively. In terms of slaughtering qualities, rams of the second experimental group at the age of 4 and 18 months revealed a significant advantage in the carcass weight and slaughter weight (P <0.05-0.001). Purebred sheep of Aginskaya breed were distinguished by the best wool productivity.

sheep, Aginskaya breed, Kazakh breed, Bayys type, live weight, meat productivity, wool productivity

1. Chernykh V.G., Volkov I.V., Khamiruev T.N., Bazaron B.Z. Aginskaya poroda ovets: monografiya [Aginskaya sheep breed: monograph]. Chita: Chitinskaya gorodskaya tipografiya Publ., 2015, 187 p. (in Russian).

2. Khamiruev T.N., Chernykh V.G., Volkov I.V. Novoe napravlenie v ovtsevodstve Zabaikal’ya [New trend in sheep breeding of Zabaikalya]. Ovtsy, kozy, sherstyanoe delo [Sheep, goats, wool business], 2015, no. 4, pp. 10–14. (in Russian).

3. Vologirov M.K., Bezhdulov V.Sh., Kardanov Kh.Kh. Otgonno-gornoe ovtsevodstvo – effektivnyi sposob uvelicheniya i udeshevleniya proizvodstva ekologicheski chistoi molodoi baraniny [Distant-pasture mountain sheep breeding as an effective way to increase and make cheaper the production of ecologically clean lamb meat]. Ovtsy, kozy, sherstyanoe delo [Sheep, goats, wool business], 2013, no. 2, pp. 51–56. (in Russian).

4. Krishtafovich V.I., Surzhanmkaya I.Yu., Makarova A.V., Кrishtafovich D.V. Povyshenie resursov myasa molodnyaka ovets [Increasing the resources of meat of young sheep]. Potrebitel’skaya kooperatsiya [Consumer co-operative movement], 2015, vol. 50, no 3, pp. 9–15. (in Russian).

5. Guseva G.Ya., Guseva N.V. Sistema elementov organizatsionno-ekonomicheskogo mekhanizma, obespechivayushchaya povyshenie effektivnosti funktsionirovaniya ovtsevodstva v Kazakhstane [The system of elements of organizational and economic mechanism ensuring the increase in effectiveness of sheep breeding in Kazakhstan]. Gornoe sel’skoe khozyaistvo [Mountain agriculture], 2017, no. 1, pp. 41–45. (in Russian).

6. Jacob R.H., D’Antuono M.F., Gilmour A.R., Warner R.D. Phenotypic characterisation of colour stability of lamb meat. Meat Science, 2014, vol. 96, pp. 1040–1048. DOI: 10.1016/ j.meatsci.2012.11.031.

7. Kelman K.R., Pannier L., Pethick D.W., Gardner G.E. Selection for lean meat yield in lambs reduces indicators of oxidative metabolism in the longissimus muscle. Meat Science, 2014, vol. 96. pp. 1058–1067. DOI: 10.1016/ j.meatsci.2013.08.017.

8. Yuldashbaev Yu.A., Leshcheva M.G. Problemy aktivizatsii innovatsionnoi deyatel’nosti v sovremennom ovtsevodstve [The problems of activation of innovation activities in modern sheep breeding]. Dostizheniya nauki i tekhniki APK [Achievements of Science and Technology of AIC], 2011, no. 11, pp. 6–8. (in Russian).

9. Trukhachev V.I., Leshcheva M.G., Yuldashbaev Yu.A. Myasnoi rynok Rossii: analiz sostoyaniya i perspektivy razvitiya [Meat market of Russia; analysis of the present condition and development prospects]. Dostizheniya nauki i tekhniki APK [Achievements of Science and Technology of AIC], 2012, no. 11, pp. 3–9. (in Russian).

10. Annett R.W., Carson A.F., Dawson L.E.R., Irwin D., Kilpatrick D.J. Effects of breed and age on the performance of crossbred hill ewes sourced from Scottish Blackface dams. Animal, 2011, vol. 5. pp. 356–366. DOI: 10.1017/ S1751731110002090.

11. Wilkes A., Barnes A.P., Batkhishig B., Clare A., Namkhainyam B., Tserenbandi, Chuluunbaatar N., Namkhainyam T. Is crossbreeding with indigenous sheep breeds an option for climate-smart agriculture? Small Ruminant Research, 2017, vol. 147, pp. 83–88. DOI: 10.1016/j.smallrumres.2016.12.036.

12. Khamiruev T.N., Volkov I.V., Bazaron B.Z. Sravnitel’naya otsenka produktivnykh kachestv polugrubosherstnykh ovets raznykh genotipov [Comparative assessment of productive qualities of semi-coarse wool sheep of different genotypes]. Dostizheniya nauki i tekhniki APK [Achievements of Science and Technology of AIC]. 2017, vol. 31, no. 9, pp. 52–54. (in Russian).

13. Kineev M.A., Erdenov B.K. Porody ovets i koz Kazakhstana: monografiya [Breeds of sheep and goats of Kazakhstan: monograph]. Almaty: Izd-vo «Bastau» Publ., 2009. 34 p. (in Russian).

14. Plokhinskii N.A. Rukovodstvo po biometrii dlya zootekhnikov [Guidelines on biometrics for zoo-technicians]. M.: Kolos Publ., 1969. 256 p. (in Russian).