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Advanced reproductive technology in the water buffalo.

M Drost1

  • 1Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32610-0136, USA. drost@ufl.edu

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Embryo transfer in water buffaloes is less successful than in cattle due to lower fertility and poor superovulation response. In vitro embryo production, particularly Ovum Pick Up, offers a more effective alternative for improving embryo yields.

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Area of Science:

  • Reproductive biology
  • Embryology
  • Veterinary science

Background:

  • Embryo transfer (ET) techniques in water buffaloes are adapted from cattle but show lower success rates.
  • Water buffaloes exhibit lower fertility, poor superovulatory response, and smaller ovarian follicle populations compared to cattle.
  • Challenges in estrus detection further complicate buffalo embryo transfer.

Purpose of the Study:

  • To evaluate alternative methods for improving embryo production in water buffaloes.
  • To investigate the potential of in vitro embryo production (IVEP) and Ovum Pick Up (OPU) over traditional superovulation.
  • To explore intergeneric embryo transfer possibilities and nuclear transfer applications.

Main Methods:

  • Comparison of superovulation protocols versus Ovum Pick Up (OPU) for embryo yield.
  • Investigation of intergeneric embryo transfer from water buffalo to cattle.
  • Somatic cell nuclear transfer (SCNT) using water buffalo nuclei into enucleated bovine oocytes.

Main Results:

  • Superovulation yields less than one transferable embryo per donor, while OPU yields approximately 2.0 embryos per donor monthly.
  • Intergeneric transfer of 13 buffalo embryos into Holstein heifers resulted in no pregnancies.
  • Successful development of buffalo somatic cell nuclei into blastocysts within enucleated bovine oocytes was achieved.

Conclusions:

  • Ovum Pick Up (OPU) is a more efficient method for water buffalo embryo production than superovulation.
  • Intergeneric embryo transfer between water buffalo and cattle is currently not feasible.
  • Somatic cell nuclear transfer shows promise for future applications in water buffalo genetic improvement.