Genotype of Aginskaya sheep breed
A brief description of the initial stock, as well as of the got hybrid individuals by productive indices, is presented at the development of semi-coarse-wool sheep of Aginskaya breed. The Aginskaya breed of sheep is created by the method of complex reproductive crossing of Trans-Baikal breed ewes with stud rams of Kuchugurov and Kazakh breeds. The breeding stock of the Trans-Baikal breed used in crossing was characterized by the following indices: average live weight - 50,5 kg, clean equivalent weight -1,7-1,9 kg, wool length - 7,8-8,2 cm, fiber diameter - 20,6-22,8 microns. The stud rams of Kuchugurov and Kazakh breeds had an average live weight equal to 78,0 kg, a yield of greasy wool - 3,4 kg, a wool length of the upper tier - 20,9 cm, and also 94,0 kg, 3,4 kg, 13,5 cm, respectively. The average live weight of the Aginskaya breed ewes is 56,0 kg, the wool yield of the physical weight is 2,5 kg; at the stud rams - 92,1 kg, young rams and ewe lambs - 57,0 and 45,9 kg, respectively, wool yield in rams - 3,8 kg, in young rams - 2,45 kg, ewe lambs - 2,20 kg, wool length of the upper tier - 16,00-16,11, of the lower - 8,3-9,3 cm. Density of follicles per 1 sq.mm of skin in stud rams has made 27,36; in replacement young rams - 31,41; in ewes - 31,93 and ewe lambs - 43,03 pieces per 1 mm<sup>2</sup>. The total thickness of the skin among the stud rams was 2734.07; in replacement young rams - 2687,10; ewes - 2617,37; ewe lambs - 1899,22 microns. The thickness of the skin tissue from the investigated sheepskins was 0,7 mm; the load at rupture of the whole sheepskin has made 442 N; the tensile strength was 66,3 MPa, on the basis of these materials, sheepskins are recommended for the production of fur velour and the tailoring of fur products. The profitability of the realization for meat of super-replacement youngsters of the Aginskaya semi-coarse-wool breed at the age of 4,5 months was 75,2%, at the age of 18 months - 83,7%, which is 59,6 and 59,7% higher than the similar index in herd mates of the Trans-Baikal fine wool breed. The desired type of hybrids was determined when creating the Aginskaya semi-coarse-wool breed of sheep.