Some Features of the Manifestation of Breeding Traits in Lambs of the Karakalpak Sur Breed Type

Abstract

Karakalpakstan is one of the largest regions of karakul breeding in Uzbekistan and the main breeding base for breeding karakul sheep surs of the Karakalpak breed type of original colors.

In connection with the foregoing, the establishment of some boundaries for the manifestation of breeding traits in sheep of a given color is considered relevant.

The article presents the results of studies on the study of the severity of coloring and the length of curls in offspring obtained from a homogeneous and heterogeneous selection of Karakalpak sur sheep of different colors. The evaluation 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 research, it was found 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 the homogeneous selection of sheep of “Shamchirak” coloring was established in comparison with other selection options for the output of lambs with a strong coloring (90.0 ± 3.0%). This superiority was 22.0% in relation to the second selection option, 35% to the third, and 51.0% to the fourth.

The results showed the presence of a certain dependence of the length of the curls on the color of the mated parents. At the same time, the offspring obtained from the selection of “Shamchirak x shamchirak” significantly exceeds (P<0.001) in terms of the yield of long-curled lambs (60.0±4.89%) the indicators of other options (25.0-31.0%). In the last three variants of selection, the offspring mainly had curls of medium length (52.0-58.0%).