Interaction between the genotype of tsigai sheeps, the environmental conditions, the selection and the breeding technology
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Author: Nikolay Kirillovich Bogdan
In this paper we present data about the live weight and the yield of greasy and washed wool of ewes from two subpopulation types of the Tzigai sheep breed - Priazov and Crimea, raised in different environmental conditions in Ukraine. A great variability of the studied traits was observed in the sheeps of age 2 and 3 years from the both types. The differences in the live weight are in favour of the sheeps reared in the Odessa region. Higher body weight was also observed in the sheeps from Crimean type in the Crimea region. The highest quantity of greasy and washed wool is harvested from sheep of Priazov type reared in Odessa region, and from Crimean type in the Crimea region.At the age of 1-2 years, the coefficient of repeatability of live weight ranged from rw = 0,50 in ewes of Crimean type in Poltava region to rw = 0,60 in sheep of Priazov type in Odessa region. At the age of 2-3 years, the coefficient of repeatability of live weight ranged from rw=0,54 in the ewes of Priazov type in Poltava region to rw = 0,67 in ewes of Priazov type in Odessa region and Crimean type in Crimea region. The repeatability of wool production at the age of 1–2 years is between rw=0,42–0,48 in ewes of Priazov type and rw=0,44–0,49 in ewes of Crimean type. The highest coefficient of repeatability of wool production is found at age of 2–3 years, by ewes of Priazov type in Odessa region (rw = 0,62) and by Crimean type in Crimea region (rw = 0,61).

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