Association of SNP localized near DIO2 gene with hormonal profiles of the thyroid axis and fertility indicators in black-and-white cows
| Autor: | O. Mityashova, O. Kostyunina, O. Aleinikova, N. Bardukov, I. Lebedeva |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Genetics and breeding of animals. :5-13 |
| ISSN: | 2410-2733 1000-0267 |
| Popis: | Thyroid hormones can affect the reproductive function of cows through the regulation of various metabolic pathways. The activity of the thyroid system is under the control of three types of deiodinases (DIO). In cattle, there are several genetic variants for the DIO1 and DIO3 genes, but there is no information on the polymorphism of the DIO2 gene.Purpose: to conduct a search for genetic variants for SNPs in the DIO2 gene and in nearby regions and investigate their association with prepartum and postpartum thyroid profiles and reproductive performance in dairy cows.Materials and methods. Black-and-white cows of calving 2-4 were used in the experiments. Before calving and after calving, blood was taken from the animals to determine the concentration of hormones by ELISA. The assessment of the luteal activity of the ovaries was performed on the basis of an ultrasound study and the content of progesterone in the blood. Genotyping was performed on 48 samples of cow DNA using a Bovine GGP 150K biochip.Results. No SNPs present on the Bovine GGP 150K chip were found within the target gene. The SNP Bovine- HD1000026761, localized upstream of the DIO2 gene, was selected for research, with a frequency of genotypes being 45.83% (AA), 47.92% (AG), and 6.25% (GG). In cows with the AA and AG genotypes, a decrease of 1.4 times (pConclusions. The data obtained indicate that the SNP BovineHD1000026761, located upstream of the DIO2 gene, is associated with long-term changes in thyroid hormone levels in the prepartum and postpartum periods. |
| Databáze: | OpenAIRE |
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