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Asian-Australas J Anim Sci > Volume 17(5); 2004 > Article
Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2004;17(5): 617-620.
DOI: https://doi.org/10.5713/ajas.2004.617    Published online January 1, 2004.
Developmental Rate of Rabbit Parthenogenetic Embryos Derived Using Different Activating Protocols
P. Chrenek, A. Makarevich
The present study compares development of rabbit embryos generated using different oocyte activation protocols and reconstructed with embryonic or cumulus cells as nuclear donor. In vivo matured oocytes were collected from New Zealand White rabbits at 16 h after ovulation treatment and were activated at18 h of post-ovulation treatment. The following schemes of oocytes activation were tested: 1) single electric pulse (EP, 3.2 kV/cm, 3 20 s, 0.3 M mannitol)+5 min culture in the presence of 5 mM Ionomycin, 2) single electric pulse (EP, 3.2 kV/cm, 3 20 s, 0.3 M mannitol)+1 h culture in the presence of 2 mM 6-DMAP, and 3) three electric pulses 30 min apart. Cleavage rate, percentage of expanded and hatched blastocysts as well as total cell number of blastomeres of parthenogenetic embryos were significantly higher using either EP+6-DMAP or 3 EP schemes, comparing with EP+Ionomycin. Development rate up to hatched blastocyst stage of cloned rabbit embryos using the EP+6-DMAP for activation of nuclei were 19% for embryonic cell nuclei and 36% for cumulus cell nuclei. The best activation protocol optimalized in this study was the combined treatment
Keywords: Oocyte Activation; Nuclear Transfer; Development; Rabbit
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