Comparative assessment of meat productivity of purebred and crossbred fat-tailed sheep in the Republic of Karakalpakstan

The article presents data on the live weight and meat productivity of first-generation (F 1 ) crossbred lambs obtained from crossing Jaidari breed ewes with Hissar breed lambs, which is a scientific basis for increasing the meat productivity of tailed sheep breeds in the natural and climatic conditions of the Republic of Karakalpakstan. It was found that at the age of 18 months, lambs of the second group (Hissar pure breed) and the third group (Hissar x Jaidari) of the first generation (F1) outperformed their peers from the first group (Jaidari pure breed) in live weight, respectively, by 6.0 kg, or 9.2% (p < 0.001), and by 4.4 kg, or by 6.7% (p < 0.01). This indicates the high genetic potential of these animals in the formation of live weight and meat productivity, as well as their good adaptability to the environment and the high potential of breeding sheep, as well as the main absolute and relative indicators of slaughter results. Group II (pure Hissar breed) and Group III ( ½ Hissar x ½ Jaidari) bred first-generation sheep (F1) compared to their peers in Group I (Jaidari breed), respectively, by 15.6 kg, or by 33.5% (p < 0.001), and 5.6 kg, or by 12.0% (p < 0.01), uncooled carcass weight — by 9.4 kg, or by 47.7% (p < 0.001), and 5.2 kg, or by 26.4% (p < 0.01), slaughter weight — by 13.5 kg, or 59.5% (p < 0.001), and by 6.8 kg, or 29.9% (p < 0.01), slaughter yield of sheep — by 48.8%, 58.3% and 56.7%, respectively, which is 9.5% and 7.9% higher than that of their peers Group I (Jaidari). Thus, based on the scientific basis for increasing the meat productivity of tailed sheep breeds in the natural and climatic conditions of the Republic of Karakalpakstan, the first-generation (F 1 ) crossbred lambs obtained as a result of crossing purebred Hissar and Jaidari sheep with Hissar sheep showed high live weight and meat productivity indicators, which testifies to the high genetic potential of feeding them with complete and rationed feeds in pasture conditions.

Ҳали таржима қилинмаган