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- W4366181108 abstract "The key to successful selection and breeding work and genetic assessment accuracy of sheep is thorough accumulation of information about their phenotype. Most of the parameters evaluated in breeding animals are fixed in the breed. However, they do not fully reflect sheep meat qualities, therefore, it is not always possible to use them in genomic breeding programs. The aim of the work is to search for new informative phenotype parameters associated with meat productivity of sheep of the North Caucasian meat and wool breed for further usage in genomic breeding programs. The possibility of determining the following parameters was studied using an ultrasound scanner: the girth of the shoulder, forearm and thigh with a measuring tape, as well as the thickness and width of the loin eye (TLE and WLE), the thickness of the femoral muscle (TFM) and fat in the lumbar part (TF). One-shear tups (n=50) of the North Caucasian meat and wool breed were the object of the study. The significance of new phenotype parameters was assessed by the main component method. In the course of the work, highly reliable relationships (r˃0.8; p<0.01) were established between the live weight of one-year-old tups and average daily gain, withers height and rump, back and chest width, thickness and width of loin eye. The results of main component analysis showed that more than 80% of phenotypic variability is determined by the first six components. The most significant parameter in assessing the total variance was TFM measurement - 0.67, and the least significance was shown by the thigh girth of 0.16. Thus, the parameters of TFM and TF determined by ultrasound can be used for phenotypic assessment of sheep of the North Caucasian meat and wool breed, in particular, when searching for genomic associations with productive qualities." @default.
- W4366181108 created "2023-04-19" @default.
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- W4366181108 date "2022-03-25" @default.
- W4366181108 modified "2023-09-30" @default.
- W4366181108 title "EVALUATION OF PHENOTYPIC PARAMETERS OF SHEEP OF THE NORTH CAUCASIAN MEAT AND WOOL BREED BY THE ANALYSIS OF THE MAIN COMPONENTS" @default.
- W4366181108 doi "https://doi.org/10.18286/1816-4501-2022-1-174-181" @default.
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