INTERRELATION OF DAIRY PRODUCTIVITY AND FERTILITY OF BLACK-AND-WHITE COWS DEPENDING ON A MONTH OF CALVING AND FORMS OF INHERITANCE OF THE MILK YIELD
Some selection-genetic parameters of dairy productivity of black- and-white cattle depending on additive and non-additive forms of yield inheritance are defined. It is established that dairy productivity of cows depends on the form of milk yield inheritance. Thus the highest milk yield of calves (4701 kg of milk) is registered in case of super domination, and the lowest one (2622 kg) in case of regress. The correlation at the additive form of inheritance is positive (P<0.001) and in case of non- additive form of inheritance is almost equal to zero and can be even negative (P>0.05).