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2023, № 104

UDC: 636.082:591.11
GSNTI: 68.39.29

Muscle tissue fatty acid profile in different Simmental bulls genotypes for TG5 and LEP genes

Data on the fatty acid composition of the longissimus dorsi muscle in Simmental bulls depending on TG5 (c. -422C>T) and LEP (c. 239C>T) polymorphisms are given. Basing on the results of genotyping, young animals (n=26 heads) were grouped according to the genotype in genes associated with fat metabolism. The genetic determination of the fatty acid profile in muscle tissue from Simmental bulls with different allelic variants of genes has been found. The TG5 (c. -422C>T) polymorphism had a significant (P<0.05) effect on the differentiation of bulls in terms of the stearic, linolenic and total amount of polyunsaturated fatty acids synthesis synthesis. Heterozygous TG5CT animals outperformed homozygous peers in the content of linolenic (C18:3) acid by 0.07% (P<0.05), and linoleic (0.21%; P=0.26) and arachidonic (0.18%; P=0.12) at the trend level. The LEP (c. 239C>T) polymorphism had a less significant effect on the fatty acid profile of beef. Heterozygous LEPCT individuals were characterized by increased level of unsaturated fatty acids in the longissimus dorsi muscle. Meat from CC-homozygous animals was rich in saturated fatty acids with an advantage of 1.20-1.24% over individuals with the T-allele. The obtained data are recommended for use in selection and breeding work with Simmental cattle to improve the beef quality.
Keywords: Simmental breed, bulls, beef, fatty acid profile, genes of fat metabolism.
DOI: 10.21515/1999-1703-104-153-158

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Authors:

1. Sycheva Irina Nikolaevna, PhD in Agriculture, associate professor, FSBEI HE “RSAU-MAA named after K.A. Timiryazev”.
2. Bystrenina Irina Evgenievna, PhD in Pedagogy, associate professor, FSBEI HE “RSAU-MAA named after K.A. Timiryazev”.
3. Ivashova Olga Nikolaevna, PhD in Agriculture, associate professor, FSBEI HE “RSAU-MAA named after K.A. Timiryazev”.
4. Shchedrina Elena Vladimirovna, PhD in Pedagogy, associate professor, FSBEI HE “RSAU-MAA named after K.A. Timiryazev”.
5. Tsibizova Oksana Vladimirovna, PhD in Philology, FSBEI HE “RSAU-MAA named after K.A. Timiryazev”.