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MEAT COWS MILKINESS DEPENDING ON TYPE OF SELECTION OF PARENTS

Abstract

Effect of homogeneous and heterogeneous matching of parents according to indices of antigen similarity (ras) and index of tallness (IVT) on milk performance of cows of Ukrainian meat breed has been studied. Daughters of sires of tall type had higher milk performance after first calving, calculated as average per 1 day of life. Coevals of sires of compact type had better lifetime production. Inbreeding decreases milk performance as compared to outbreeding. The cows, obtained from inline inbreeding, had the worst milk production. Heterosis effect on milk performance was appearing where both parents were mated with the use of inbreeding directed for the beginner of the mother line, as well as for the “mediator”. Heterogeneity of parents by the indices of antigen similarity and tallness reduces the negative impact of related mating. Inbreeding applied to the ancestors varying in conformation and parentage is less risky than that with homogeneous animals.

About the Author

A. N. Ugnivenko
National University of Life and Environmental Sciences of Ukraine
Russian Federation


References

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Review

For citations:


Ugnivenko A.N. MEAT COWS MILKINESS DEPENDING ON TYPE OF SELECTION OF PARENTS. Zootechnical Science of Belarus. 2015;50(1):172-179. (In Russ.)

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ISSN 0134-9732 (Print)