Study of the skin histological structure in ewes from Staroplaninska and Thoroughbred Tsigai

Study of the skin histological structure in ewes from Staroplaninski and Thoroughbred Tsigai (Introduced Tsigai - Priazovski type) was conducted. The origin of the ewes from Staroplaninski Tsigai was from reproductive breed herds for Northern Bulgaria - Goliama Zheliazna, Vranilovtsi, Mramoren, Malinovo and Borovtsi. The Thoroughbred Tsigai was imported from sovkhoz 'Roza Lyuksemburg' and was reared in the Experimental base of RIMSA-Troyan. The animals from Staroplaninski Tsigai were bought as lambs at 3-months age and were reared till 5.5-years age in one herd together with Thoroughbred Tsigai.The results of the study showed that the ewes from the farms in RIMSA-Troyan and Malinovo had the largest total skin thickness and its layers, respectively 2994.7 μm and 2862.3 μm, and the thinnest was from Mramoren - 2703.5 μm. In similar way were the groups regarding to depth and width of primary and secondary bulb fibres.The width of fibre roots and follicles of the in animals from the farms in RIMSA-Troyan and Malinovo was the largest and in those from Mramoren the smallest.The density of fibre roots was the largest in animals from the farm in Mramoren - 4.15 бр/μm 2 and the smallest in those from Goliama Zheliazna - 3.64 бр/μm 2 .