In Vitro Production of Pig Embryos using Intracytoplasmic Injection of Flow Cytometry Sorted Boar Spermatozoa

  • Kim, Dae-Young (Division of Biological Science, Gachon University of Medicine and Science) ;
  • Hyun, Sang-Hwan (College of Veterinary Medicine, Chungbuk National University) ;
  • Lee, Eun-Song (School of Veterinary Medicine, Kangwon National University)
  • Published : 2008.12.31

Abstract

The ability to preselect the sex of piglets is advantageous in the pig industry. The objective of this study was to examine the feasibility of using intracytoplasmic sperm injection (ICSI) with sorted spermatozoa to produce piglets with a preselected sex. Pig embryos were produced by ICSI of frozen X- and Y-sperm that had been separated by flow cytometry. The developmental competence of the embryos was investigated in vitro and in vivo. The populations of X- and Y-spermatozoa were 52.7% and 47.3%, respectively in our samples. The in vitro development of ICSI embryos was enhanced by longer of in vitro maturation of oocytes ($44{\sim}48\;h$ vs. $40{\sim}43\;h$). Their cleavage ($65{\sim}70%$) and blastocyst formation ($9{\sim}12%$) rates were not significantly different between male and female ICSI embryos, or between sorted and unsorted sperm-derived embryos. One pregnancy was established in a recipient that was transferred with 110 female ICSI embryos, but the pregnancy was terminated on Day 89 of gestation. Our results suggest that the separation X- and Y-spermatozoa by flow cytometric sorting can be a useful tool in combination with ICSI for the production of pig embryos and piglets of preselected sex.

Keywords

References

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