Studying the Expressiveness of Color in Sur Lamb of the Karakalpak Breed Type

Abstract

Karakalpakstan is one of the large Karakul breeding regions of Uzbekistan and the main breeding base for breeding Karakul sheep of the Karakalpak breed type of original colors. In connection with the above, establishing some boundaries for the manifestation of selection traits in sheep of a given color is considered relevant. The article presents the results of studies on the severity of colors and length of curls in offspring obtained from a homogeneous and heterogeneous selection of Karakalpak sur sheep of different colors. The assessment of the resulting offspring was carried out in accordance with the “Instructions for conducting breeding work in Karakul breeding and evaluation (grading) of Karakul lambs.” As a result of the studies, it was established that, depending on the colors of the parents and their selection in different variants, there is a significant variation in the yield of lambs in terms of the severity of colors. A significant superiority of homogeneous selection of sheep of the “Candle-flame” coloring was established compared to other selection options for the yield of lambs with a strong color expression (90.0±3.0%). This superiority compared to the second selection option was 22.0%, the third -35%, and the fourth - 51.0%. The results showed the presence of a certain dependence of the length of the curls on the colors of the mated parents. At the same time, the offspring obtained from the selection “Candle-flame x Candle-flame” significantly exceeds (P<0.001) in terms of the yield of long-curl lambs (60.0±4.89%) the indicators of other options (25.0-31.0%). In the last three selection options, the offspring mainly had curls of average length (52.0-58.0%).