Novak N. The biotechnological aspects of genetic improvement of milk production traits of cattle

This thesis is dedicated to research on biotechnologic approaches for improvement of cattle milk production traits by using the genetic potential of animals. The complex analysis of genetic structure of Ukrainian black-and-white dairy cattle herd was done. Cattle was analysed for 8 genes of quantitative traits, which are associated with milk production rates of cattle. The correlation relations between genotypes of analysed QTL's and milk production rates of cattle were determined. Practical recommendations for improvement of milk production rates were designed. The comparative analysis of information value of two types of molecular-genetic markers was done. Genetic passport system was proposed of cattle breeds with two DNA-marker types using. PCR-Real-Time based diagnostyc test-system has been optimized and proposed for using during anti-leukosis actions for the first time in Ukraine.