Curent state and futyre of using the biotechnological methods of reproduction in sheeps breeding


  • M. Sharan Institute of Animal Biology of NAAS, Lviv, Ukraine
  • K. Grymak Institute of Animal Biology of NAAS, Lviv, Ukraine
Keywords: sheep-donors, recipients, polyovulation, embryotransplantation, cryopreservation, hormones, ovaries, the corpus luteum

Abstract

The analysis of publication related to the usage of embryo transplantation method in breeding sheep had been conducted. It is proved that the theoretical basis of the method of embryo transplantation is the large number of germ cells in the ovaries of females, most of which during the  usual method of reproduction does not participate in these processes, and the high probability of inheriting genetic characteristics of embryos after transplantation by  recipient. On this basis, from females throughout her life we can get a few dozen of descendants. The main aspects of embryos transplantation technology is to development of new methods that will ensure obtaining of the greatest number of good-quality embryos with desirable genotypes, both by the induction of multiple ovulation and by cultivation of  follicular oocytes outside the body. It has been defined, that its usage is limited by a number of factors that are not well studіed and many of them are contradictional, in particular unpredictable results of the multiple ovulation induction. The development of the method of predicting the results of polyovulation will significantly increase the efficiency of embryos transplantation and significantly reduce the cost of labor and financial resources. It has been shown, that one of the main factors of making transplantation more practical is to develop the methods of embryos cryopreservation. This will simplify the selection of recipients and donors by the sexual cycle, will further long distance transportation and will enable the transplantation in the planned breeding herdsThe further of the method, along with modern advances of genetics, embryology, endocrinology, will in the near future lead to develop a comprehensive method for the accelerated creation in sheep breeding flocks of high performance animals.

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Published
2017-03-03
How to Cite
Sharan, M., & Grymak, K. (2017). Curent state and futyre of using the biotechnological methods of reproduction in sheeps breeding. Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies. Series: Agricultural Sciences, 19(74), 67-70. https://doi.org/10.15421/nvlvet7415