Comprehensive assessment of initial genotypes of pigs with high adaptive ability with the aim to create F1 parental pigs

Production of highly efficient parental forms LçY and YçL will be arranged for the first time in the Republic of Belarus, corresponding to world standards in terms of development and performance. Arrangement of own production of high-value animals will allow to ensure import substitution via industrial production and reduce import costs. The paper presents the results of comprehensive assessment of the initial genotypes of pigs with high adaptive capacity for accelerated creation of new final parental forms to be used in industrial pig breeding. Biochemical tests of blood of Landrace and Yorkshire breed of animals during their adaptation were analyzed. The reproductive ability of Landrace and Yorkshire boars has been evaluated. The patterns of inheritance of quantitative traits of Yorkshire and Landrace pigs performance were determined according to set of molecular genetic markers (RYR1, ESR and PRLR), which allow predicting their performance with high reliability degree. Animals were identified with preferred genotypes RYR1NN (100 %), ESRBB (12.7-30.0 %), PRLRАА (4.9- 47.5 %) associated with higher performance. Superiority of pigs was determined with genotypes ESRBB, PRLRАА in terms of multiple pregnancy and milk performance over animals of other genotypes by 7.8-9.3 and 9.0-13.2 %; 5.9-20.4 and 10.0- 21.0 %, respectively. Creation of breeding herds of highly productive animals, ensuring production of hybrid parental pig with the required breeding and genetic parameters of productivity based on new biotechnological techniques and methods, ensuring selection of valuable breeding material and, therefore, the maximum effect of breeding, will promote increase of competitiveness of domestic pig breeding. Acknowledgments. The research was carried out as part of the State Research and Development Program “High Technologies and Engineering” for 2016-2020, subprogram 1 “Innovative Biotechnologies - 2020”.

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