Results of research on group formation donor cows and embryos transplantation

Abstract

The article presents the results of research on the formation of a group of donor cows and embryo transplantation of Ukrainian red-spotted breed of cattle on the basis of the State Enterprise of
Research Farm «Khrystynivske» of the Institute of Animal Breeding and Genetics named after M.
V. Zubzya of NAAS (Cherkasy region). In our studies, high donor cow embryo productivity was established. This is confirmed not only by the fact that almost 91% of the washed Melody 3142 donor
embryos were evaluated as transplantable, but also by the fact that, for one flushing, the response to
superovulation is a record – 22 embryos. According to the results, such indicators are due to the optimal preparation of donors for superovulation and their clinical health. The wash efficiency we have
obtained is quite high. The decrease of this indicator is possible due to the lack of qualification of the
technician. In addition, it is believed that a certain number of eggs with a large increase in the ovaries
do not enter the funnel of the oviduct.
As a result of research from a group of donors obtained a high yield of suitable for transplantation
of embryos at the level of 86.8%. In the study, 33 full-fledged embryos were transplanted to 24 recipients, their pregnancy rate was 45.8% and 10 transplant heifers were born.