Изучение изменчивости микросателлитов при создании нового типа мясного скота Сибири

The polymorphism of 13 microsatellites in Simmental and Hereford cattle breeds and their F1 crosses was studied. The analysis of allele pool of the cattle groups analyzed showed the high degree of genetic diversity. The average number of alleles per loci was 8.83±0.89, 6.92±0.71 and 7.17±0.78, respectively. In F1 animal population the higher heterozygous degree and significant heterozygous excess was observed that appearingly due to integration of allele pools of two initial breeds. The detail analysis of allele profiles of F1 population comparing to initial breeds make it possible to trace their effect on the forming of allele pool of crossbred animals. The high degree of genetic consolidation of created massive of Simmental-Hereford crosses (the assignment degree of individual to own population based on microsatellites was 90.3 per cent) as result of target selection for productive traits and type was observed. From the other hand the created massive of crossbred animals is genetically closed to the initials breeds. 95.3 per cent of the overall genetic diversity was due to within population differences and only 4.7 per cent was due to differences among populations. Thus, the system based on microsatellite analysis can be used as informative tool for evaluation of the allele introduction of initial breeds during creation of new beef type Siberian cattle.