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119365

THE EFFECT OF VITRIFICATION PROCEDURES AND CRYOPROTECTANT TYPES ON POST-THAW SURVIVAL RATE OF RABBIT OOCYTES.

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Last updated: 22 Jan 2023

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Abstract

Aim of the present study was to determine the effect of some factors affecting oocyte vitrification of rabbit does including, three cryodevices [Straws (S), Open pulled straws (OPS) and Sealed Open pulled straws (SOPS)] using three cryoprotectant types [40% ethylin glycol (EG), 40% dimethyl sulfoxide (DMSO) and their combination, 20% EG + 20% DMSO). Total of 36 New Zealand white (NZW) rabbit does with (5 mo old and 3.25±0.25 kg LBW) and were used in this study. Ovaries were collected and oocytes were harvested. The oocyte yield was recorded and the number of oocyte/ovary was counted, and oocyte recovery rate was calculated. Results indicated that total number of follicles averaged 36.0/doe and 18.0/ovary. Yield of oocytes averaged 31.3/doe and 15.5/ovary and oocyte recovery rate was 86.2%. Oocyte recovery rate was for 61.96, 11.65, 6.48, and 6.10% for compact, denuded, partial denuded and expanded oocytes, respectively. The corresponding frequency distribution was 71.89, 13.52, 7.52 and 7.07%, respectively. Relative to total number of vitrified oocytes, total survival rate of oocyte was not affected significantly by cryodevice, being 87.30, 83.09 and 85.77% for S, OPS and SOPS, respectively. Post-thaw survival rate of normal oocytes was the highest (68.33%, P<0.05) and abnormal oocytes was the lowest (17.44%, P<0.05) with SOPS and the opposite was obtained for straws (59.43 and 27.87%, respectively, P<0.05). While, OPS showed moderate values (63.31 and 19.78%, respectively), but did not differ significantly from each of straw and SOPS. Total survival rate of oocyte was not affected significantly by cryoprotectant type, being 85.38, 83.45 and 87.22% for EG, DMSO and their combination, respectively. Post-thaw survival rate of normal oocytes was the highest (72.56%, P<0.05) and abnormal oocytes was the lowest (14.66%, P<0.05) with EG+DMSO and the opposite was obtained for EG alone (56.92 and 28.46%, respectively, P<0.05). While, DMSO showed moderate values (61.97 and 21.48%, respectively). In conclusion, using sealed open pulled straws and combination of 40% ethylin glycol and 40% dimethyl sulfoxide as cryoprotectant solution as vitrification procedures of rabbit oocytes showed the best results of post-vitrification survival rate.

DOI

10.21608/jappmu.2009.119365

Authors

First Name

Tork

Last Name

Dorra

MiddleName

M.

Affiliation

Poultry production Dept., Fac.of Agric., Man. Univ. Egypt.

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Orcid

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First Name

Kh.

Last Name

EL. Sherif

MiddleName

-

Affiliation

Poultry production Dept., Fac.of Agric., Man. Univ. Egypt.

Email

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City

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Orcid

-

First Name

Sh.

Last Name

Shamiah

MiddleName

M.

Affiliation

Animal production Dept., Res. Inst., Agric, Rec.Center,Giza,Egypt.

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City

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Orcid

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First Name

Sara

Last Name

Fouda

MiddleName

F.

Affiliation

Poultry production Dept., Fac.of Agric., Man. Univ. Egypt.

Email

sarafikry@mans.edu.eg

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Volume

34

Article Issue

10

Related Issue

17904

Issue Date

2009-10-01

Receive Date

2020-10-18

Publish Date

2009-10-01

Page Start

9,921

Page End

9,930

Print ISSN

2090-3642

Online ISSN

2090-3723

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https://jappmu.journals.ekb.eg/article_119365.html

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https://jappmu.journals.ekb.eg/service?article_code=119365

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Original Article

Type Code

876

Publication Type

Journal

Publication Title

Journal of Animal and Poultry Production

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https://jappmu.journals.ekb.eg/

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Article

Created At

22 Jan 2023