Contingency of dairy efficiency of highly productive cows of different herds

In article the analysis of 23 breeds and 24 types of dairy breeds is given. The conducted researches on identification of an associativity of signs of dairy efficiency at cows of different breeds of highly productive herds of the Russian Federation, will allow livestock specialists selectors to be guided correctly at selection for further use of high-valuable cows of the dairy and combined breeds for creation of elite herds, and also for drawing up plans of selection and breeding work after improvement of both separate herds of dairy cattle, and large massifs of these or those regions.