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Comparison of enzymatic and mechanical methods for the collection of bovine preantral follicles

Published online by Cambridge University Press:  18 August 2016

S. Saha ,
M. Shimizu ,
M. Geshi  and
Y. Izaike
S. Saha*
Affiliation:
Department of Animal Breeding and Reproduction, National Institute of Livestock and Grassland Science, Tsukuba Norindanchi, PO Box 5, Ibaraki 305-0901, Japan
M. Shimizu
Affiliation:
National Agricultural Research Center for Tohoku Region, Morioka, Iwate 020-0198, Japan
M. Geshi
Affiliation:
Department of Animal Breeding and Reproduction, National Institute of Livestock and Grassland Science, Tsukuba Norindanchi, PO Box 5, Ibaraki 305-0901, Japan
Y. Izaike*
Affiliation:
Department of Animal Breeding and Reproduction, National Institute of Livestock and Grassland Science, Tsukuba Norindanchi, PO Box 5, Ibaraki 305-0901, Japan
*
†Present address: Agricultural and Forestry Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan; E-mail:saha@nourin.tsukuba.ac.jp
‡Present address: National Institute of Agrobiological Sciences, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan
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Abstract

A comparison was made of various devices to obtain preantral follicles from bovine ovaries. The most productive collection methods in terms of number of follicles obtained were the tissue chopper and the grinder method, with an average number of 122·25 (s.e. 5·06) and 120·45 (s.e. 6·89) preantral follicles, respectively. These were followed by ficoll gradation (119·90, s.e. 7·95), mincer (101·75, s.e. 3·98), cell dissociation sieve (100·50, s.e. 3·42) and homogenizer (95·75, s.e. 6·38). For enzymatic digestion, more time was needed and the method was less productive. Microdissection could supply good quality (80% live when collected), larger sized follicles (120 to 220 µm) but with the lowest yield (10·65, s.e. 0·94) per ovary. The isolated follicles did not show any difference (P > 0·05) in viability until day 7 of in-vitro culture irrespective of method used to harvest follicles. Accordingly the new grinding device can be recommended as a replacement for the existing mechanical devices as it can yield the same percentage (47%) of live preantral follicles but of a wider diameter range (40 to 180 µm) per ovary.

Keywords

Bovidaefollicles
Type
Reproduction
Information
Animal Science , Volume 74 , Issue 1 , February 2002 , pp. 155 - 161
Copyright
Copyright © British Society of Animal Science 2002

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