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Effect of recipient genotype on survival rate at birth of frozen local rabbit embryos
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Abstract: New Zeland White (NZW) and APRI rabbit strains were used as recipients to study the survival rate at birth of frozen AP RI embryos as well as the effect of site of ovary on ovarian activity, ovulation and embryo recovery rates. A total of IS APRI rabbits line were super-ovulated using PMSG and naturally mated with bucks of the same line. Embryos were collected 64-66 h post coitum and the normal one was examined morphologically before frozing in liquid nitrogen. After thawing, embryos (n=140) were transferred into the oviducts of recipient does of both APRI and NZW does (n=8 both).
Results indicated that no significant effect of the site of ovary on ovulation rate. The percentage of ovulation and recovery rates were higher insignificantly in left ovary by 7 and 11% than right ovary, respectively. Average number of collected APRI embryos was 12.39 ± 0.53 and recovery rate 76.1 ± 16.2/doe.Examination of ovarian structure indicated that numbers of bleeding follicles, large follicle, and small follicles were 6.22±1.95, 9.S9 ±2.13 and 9.56 ±2.3S, respectively. Genotype influenced the pregnant rate being 75% in APRI vs. 50% in NZW as well as on survival rate, which was about 45% in APRI and 31.9% in NZW
Keyword: Rabbit, breed, frozen embryo, transfer and survival rate
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| Publication year |
2013
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| Pages |
168-173
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| Availability location |
معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
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| Availability number |
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| Organization Name |
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| serial title |
Egyptian Journal of Animal Production
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| ISSN |
0302-4520
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| Author(s) from ARC |
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| Agris Categories |
Animal physiology - Reproduction
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AGROVOC
TERMS |
Breeds (animals).
Ovulation.
Rabbits.
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| Proposed Agrovoc |
survival rate;transfer rate;frozen embryo;ovarian activity;embryo recovery;
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| Publication Type |
Journal
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