An effective type of merino in the Volga region by the method of intrabreed selection

Abstract

The article presents experimental data on the use of intrabreed selection in order to create the most effective productive type of sheep of the Stavropol fine-wool breed. In the zone of the dry steppe of the Volga region the sheep of the Stavropol breed were improved by the meat merino of the Australian selection. Scientific and experimental research was carried out in JSC “New Life” ofNovouzensky district of the Saratov region. The crossbreeds obtained during the step-by-step crossing of Stavropol sheep with tup-producers of Australian meat merino with 1/8-blood content according to AMM by eye-measuring the degree of severity of wool and meat productivity were distributed according to productive indicators (live weight, wool shearing) to the corresponding specific types of productivity. The first group — the uterus of the wool productive type; the second — wool-meat, the third — meat-wool. Each group of sheep was assigned to tuh of meat-wool productive type. The offspring were obtained according to the selection of parental pairs: father x mother. At birth, the M-W x M-W ewe hoggs had an advantage over the W x M-Wanimals in terms of live weight by 7.47%, and over the M-W x M-W — by 1.7%. After weaning at 4.5 months, the live weight of all young animals decreased slightly. In 13.5 months, the superiority of group III over group I and II was 9.3%, 4.6%. In terms of cutting physical wool, group II yarks outperformed group I and III by 1.91 and 3.45%, while their advantage in pure wool was 13.6 and 4.11%. The longest coat was characterized by the young animals of group I, the stronger coat was in the young animals of group III. In the structure of fine-wooled sheep of the Stavropol breed of the Volga population three productive types were distinguished, which differ from each other in terms of productive indicators: wool, wool-meat and meat-wool. At the same time sheep of the Stavropol breed, bred in the dry steppe of the Volga region, to a greater extent deviate towards the wool-meat productive type, such merinos of the combined direction in the conditions of the modern economic situation are most demanded and profitable.