Abstract
The surveys were carried out in order to determine the ram ranks, taking into consideration the outcomes of genetic tests for validating the origin of pedigree young stock of fine-wool and semicoarsewool sheep. The immunogenetics tests for six systems, including 14 blood-group red-cell antigens, were performed with monospecific reagents of a blood bank in the immunogenetics and DNA-technology laboratory, All-Russia Research Institute of Sheep and Goat Breeding. According to the evaluation outcomes, the discrepancies in the progeny origin records were minor. The reliability of the paternal lineages for the fine-wool sheep of the Khangil type and the semicourse wool sheep of the Zugalai type comprised 91.9 and 91.7%, respectively, while the reliability of maternal linages for both breeds was 100.0%. The average liveweight and the wool clip in the nominal progeny produced from the proven fine-wool rams comprised 28.1 ± 0.27 kg and 2.12 ± 0.05 kg, respectively, while the similar parameters for the true progeny comprised 28.8 ± 0.41 kg and 2.10 ± 0.03 kg, respectively. With respect to the semicoarse wool rams, the similar parameters comprised 32.1 ± 0.42 kg and 1.47 ± 0.02 kg for the nominal progeny, respectively, and 31.6 ± 0.32 kg and 1.47 ± 0.03 kg for the true progeny, respectively. The ram evaluation based on the nominal ewe progeny performance showed that fine-wool ram no. 56137 was a disimprover for a liveweight trait (td = –1.95), while ram no. 9036 was an improver for it (td = 2.12). With respect to the true progeny, both rams were neutral. The semicoarse wool rams evaluated based on the nominal daughter liveweight were assigned to the neutral category (td 1.46 and td = –1.65, respectively). With respect to the true progeny performance, ram no. 06598 was assigned to improvers (td = 3.47), while ram no. 08992 was considered a disimprover (td = –3.91). All the rams evaluated based on their total progeny washed-wool clip were considered neutral. The Bd and Da antigens may be recognized as the potential markers for high meat and wool production performance, respectively.
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Khamiruev, T.N. Imunogenetics for Application in Ram Evaluation Based on Progeny Performance. Russ. Agricult. Sci. 47, 621–626 (2021). https://doi.org/10.3103/S1068367421060057
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DOI: https://doi.org/10.3103/S1068367421060057