Effect Of Inbreeding On Ukrainian Beef Breed
Abstract
A.N. Ugnivenko
The influence of homogenous and heterogenous mating of parents on female productivity and breeding value of the sires of Ukrainian Beef has been studied. Inbred males and females have different breeding values in meet cattle breeding. Large number of improvers of growth rate were found among the sires, obtained from related mating. In females, inbred depression by growth rate, reproductive performance and milk performance has been observed. Cows, obtained from the linebreeding had the lowest milk performance and reproductive ability. It is not recommended to use related mating in meet cattle breedingfor females obtaining, due to inbred depression. Mating of parents with inbreeding to the maternal line ancestor or “mediator” leads to heterosis by milk and reproductive ability. Heterogenity of parents by indexes of antigen similarity (ras) or body tallness index (IBT) reduces the negative impact of inbreeding. Inbreedingappliedonparentsthatweredifferentbyconformation type and ancestry is less risky as compared to homogenous animals.
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