Effects of sexed semen and interactive effects on commercial in vitro embryo production when oocytes are collected from cows of Bos indicus, and Bos taurus breeding and crossbred cows of these subspecies

Animal Reproduction Science
William Omar Contreras LopezMario Martinez-Diaz

Abstract

A large scale commercial in vitro embryo production and in vitro fertilization record is reported when there was use of oocytes from Bos taurus (BT), Bos indicus (BI), and Bos Taurus/indicus (BT/BI) crossbred subspecies fertilized with sexed (SS) and conventional (CS) semen. The aim of the study was to analyze the impacts of use SS in a commercial embryo production center in Colombia. Non-pregnant (n=800), healthy, and estrous cycling BT, BI, and BI/BT crossbred cows were selected to be used as oocyte donors. Viable oocytes from 733 ovum pick up sessions in cows of the BT (4663) and BI (7305), BT/BI (3605) groups were matured and fertilized with frozen thawed semen from commercial sires. Of all cultured oocytes (n=15,573), 52.3% of the embryos (n=8607) underwent cleavage while 3062 (19.7%) developed to the blastocyst stage. For cows of the BT, SS and CS groups, there were similar cleavage rates; however, use of SS decreased blastocyst formation (15.6% versus 18.9%). In the BI group, use of SS increased cleavage rates (59.1% versus 53%, respectively) although there was no effect on blastocyst rate development (22.9% versus 21.9). In the BI/BT groups, use of SS decreased cleavage (44.4% versus 57.1%, respectively) and blastocyst ...Continue Reading

References

Feb 1, 1983·Biology of Reproduction·B D BavisterG Lieberman
Jun 27, 2008·Biology of Reproduction·P Bermejo-AlvarezA Gutiérrez-Adán
Nov 14, 2008·Theriogenology·P BlondinW A King
Oct 16, 2010·Reproduction in Domestic Animals = Zuchthygiene·M Barceló-FimbresG E Seidel
Nov 14, 2012·Reproduction : the Official Journal of the Society for the Study of Fertility·D RathS Washausen
Jun 4, 2014·Reproduction in Domestic Animals = Zuchthygiene·T H C De BemC L V Leal

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Citations

May 14, 2016·Theriogenology·Jacob C ThundathilJohn P Kastelic
Mar 15, 2021·Reproduction in Domestic Animals = Zuchthygiene·Ivona TravnickovaMarie Machatkova

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