Growth and development features of purebred and crossbred goats

The aim of the study is to investigate the influence of genotype on the live weight, growth and deve-lopment of kids of different origins. Objectives of the study: to determine the live weight of kids from birth to 18 months of age; to calculate live weight gain (absolute, average daily, relative); to study the exterior features of kids at 6, 12 and 18 months of age. The object of the study was half-blooded kids obtained by crossing goats of the Soviet wool breed with Dagestan wool producers (experimental group) and purebred offspring of the Soviet wool breed (control group). Animals (30 heads in each group) were kept in the same conditions of the peasant (farm) enterprise Mongush V.S. Ulug-Khem District. The study was conducted according to generally accepted methods. As a result of introductory crossing of goats of the Soviet wool breed with goats of the Dagestan wool breed, a crossbred offspring was obtained, which differs from the purebred by its large live weight, high growth energy, compact build and strong constitution. Newborn half-blood kids weighed an average of 3.9 kg, which exceeded the weight of purebreds by 1.5 times (P > 0.999); at the age of 6 months - by 1.21 (P > 0.999); at the age of 12 months - by 1.18 (P > 0.95) and at the age of 18 months - by 1.13 times (P > 0.95). In the period from birth to 6 months, live weight gains were significantly higher: absolute - by 2.31 kg (P > 0.999), average daily - by 12.82 g (P > 0.999). Crossbred animals had a more proportional constitution. According to the main body measurements, they were 1.1-6.6 % higher than purebreds (P > 0.95; P > 0.99; P > 0.999). They were also characterized by a high compactness index, indicating a compact build and a strong constitution.