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Information × Registration Number 0224U002254, 0121U108154 , R & D reports Title To improve modern biotechnological methods as a means of increasing the number of breeding animals of domestic breeds popup.stage_title Head Kovtun Svitlana Ivanivna, Доктор сільськогосподарських наук Registration Date 09-02-2024 Organization Institute of Animal Breeding and Genetics nd. a. M.V.Zubets of National Academy of Agrarian Science of Ukraine popup.description2 The influence of the age of insemination of heifers on the reproductive capacity and milk productivity of 1,030 cows of Holstein, Ukrainian black-and-white and Ukrainian red-and-white dairy breeds during I–IV lactations was studied (JSC Agro-Region, SE Chaika, SE DG Niva IABG nd. a. M.V. Zubets of NAAS). It was established that the optimal age of insemination of heifers is 14–18 months for live weight 350–380 kg, taking into account their general development, especially heifers 12–13 months old age. The duration of the service period for cows with a normal course of childbirth and the post-summer period is 74–123 days (the milk yield of Holstein cows is 8–11 thousand kg, Ukrainian black-and-white dairy cows – 8–9 thousand kg, Ukrainian red-and-white cows dairy breed – 7–8 thousand kg). On the basis of SE "DG Khrystinivske" IABG nd. a. M.V. Zubets of NAAS created a laboratory of embryo transplantation of the Ukrainian red-and-white dairy breed as a training and demonstration site of the NAAS. A group of donor cows was formed in the embryo transplantation system to increase the number of the own herd and increase its productivity. A grant was received for technical support of the project "Using embryo transplantation biotechnology for breeding cattle and preserving the gene pool" from "BioUkraine" of the Ukraine-USA Foundation. Recommended based on the analysis of 556 cycles in 1034 heads. and finding about 38.0% active ovaries on the left and 62.0% activity on the right to establish and use profiles of ovarian functional asymmetry for enhanced herd reproduction. Within the framework of the implementation of the tasks of the "Project for the development of embryo transplantation of cattle and sheep in Ukraine for 2022-2025 using the potential of the experimental and production base of the NAAS it was established that for the years 2013-2021, four farms of different forms of ownership for the use of breeding cattle received 289 embryos. Product Description popup.authors Arutiunian Davyd A. Boiko Olena V. Demchuk Stepan Yu. Kovtun Svitlana I. Stakhovsky Volodymir F. Trotskyi Petro A. Sharapa Hryhorii S. Shykova Nataliia V. Shcherbak Oksana V. popup.nrat_date 2024-02-09 Close