The aim of this article was to determine the morphometric properties of wool coat in relation to weight and age of animals. The objects of the study were Tuvan coarse-wooled bucks from farms located in the Republic of Tyva (Russia) on the border with Mongolia. Goat wool samples were taken from the side behind the scapula for examination using an OFDA 2000 optical hair diameter analyzer. It was found that there is no correlation between body weight and down length, with down length having a correlation with total wool length at the 0.48 level. The average diameter of the fibers in the staple correlates positively with the peak value of the histogram (0.47), while the dependence of down length on its diameter is weakly negative (–0.19). It was found that there are animals in the population with a down hair length of more than 7 cm, and with a histogram peak of 16 μm. We believe that there is genetic potential in the population of aboriginal Tuvinian coarse-wooled goats to create herds with down productivity with fine down (cashmere) free from transitional type fibers and satisfying industry requirements in terms of length.

Increasing the competitiveness of products based on a more complete use, preservation and improvement of the existing breed potential, adaptation to local natural and technological conditions is an urgent problem of animal husbandry. The purpose of the research was to determine the meat productivity of Tuvinian castrate goats in the year of their birth. The article presents The results of a research of the meat productivity of young Tuvinian coarse-wooled goats in the year of birth during feeding and fattening. The obtained data have shown that in the year of birth the optimal age for obtaining meat production is 8 months. When fattening, the young Tuvinian goats surpass their herdmates of the Soviet wool breed in terms of slaughter and meat qualities. In order to increase the production of young goats environmentally friendly goat meat from young Tuvinian goats in the year of their birth, it is necessary to practice their graziery and fattening up to 8 months of age. Fattening provides higher weight gains and better indicators of meat productivity than when feeding on natural pastures. Weight of carcasses is higher by 3,41 %, slaughter weight by 3,82 %, carcass yield by 1,82 %. When fattening young Tuvinian coarse-wooled goats at slaughter and meat quality is superior to their herdmates Soviet wool breed: weight before slaughter by 11,4 %, the hot carcass weight by 10,5 %, slaughter weight by 12,7 %, slaughter yield by 0,55 %. In order to increase the production of young, environmentally friendly, dietary goat meat from young Tuvinian goats in the year of their birth, it is necessary to practice their graziery and fattening up to 8 months of age.

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The research purpose was to determine the morphometric parameters of the coat in animals of productive age. The objects of the study were Tuvan coarse-haired goats at the age of 3 years (n = 20) from the agricultural enterprise “Uurgai” located in the southeastern part of the Republic of Tyva (Russia) bordering Mongolia in the south. Wool samples were taken from the animals from the side behind the shoulder blade for examination using an optical fiber diameter analyzer OFDA 2000. It was found that the length of the down averaged 6.35 ± 0.45 cm (Cv = 31.6). The down in the studied goats is shorter than the covering hair and in 35% of the animals studied it exceeds the length of 7 cm. As a result of wool studies using the optical fiber diameter analyzer OFDA 2000, it was found that the proportion of down hair (less than 30 μm) averages 80.21 ± 1.57% (Cv = 8.8), with a fairly significant difference between the extreme values from 67.52 to 90.84%. The amount of transitional hairs has critical differences from 2.28 to 19.42% at Cv = 64.6, while in animals with a low content of transitional hair in the staple (2.28–4.14%), the peak of the diagram has a value within 15–17 μm with a correlation coefficient of 0.69. The data obtained allows for the following conclusion: in order to obtain high-quality down with the smallest fiber diameter when breeding native Tuvan coarse-wooled goat, special attention should be paid to the presence of a transitional hair type (30.1–52.5 μm) in addition to the length of the down and its diameter.