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The influence of oocyte maturational stage on hatching and triploidy rates in hybrid (bester) sturgeon, Huso huso × Acipneser ruthenus

Identifieur interne : 000F70 ( Main/Exploration ); précédent : 000F69; suivant : 000F71

The influence of oocyte maturational stage on hatching and triploidy rates in hybrid (bester) sturgeon, Huso huso × Acipneser ruthenus

Auteurs : Naotaka Omoto [Japon] ; Mamoru Maebayashi [Japon] ; Shinji Adachi [Japon] ; Katsutoshi Arai [Japon] ; Kohei Yamauchi [Japon]

Source :

Aquaculture : (Amsterdam) [ 0044-8486 ] ; 2005.

RBID : Pascal:05-0122787

Descripteurs français

Pascal (Inist)
- Ovocyte, Eclosion, Triploïdie, Hybride, Frai, Oeuf, In vitro, Maturation oeuf, Aquiculture, Milieu marin, Acipenser sturio, Huso huso.
Wicri :
- topic : Aquiculture, Milieu marin.

English descriptors

KwdEn :
- Acipenser sturio, Aquaculture, Egg, Hatching, Huso huso, Hybrid, In vitro, Marine environment, Oocyte, Oocyte maturation, Spawning, Triploidy.

Abstract

We have investigated the relationship between maturational competence and hatching rate of eggs ovulated following injection of lutenizing hormone releasing hormone ethylamide (LH-RHa) in the cultured hybrid (bester) sturgeon (Huso huso female×Acipenser ruthenus male). Among 10 steroids tested (including progesterone) in a previous study, 17α-hydroxyprogesterone (17αOHP) was the most potent inducer of final maturation in the bester, with results similar to 17a,20p,21-trihydroxy-4-pregnen-3-one and 17α,20β-dihydroxy-4-pregnen-3-one. We therefore used 17αOHP to estimate maturational competence in the present study. In vitro oocyte maturation response to 17αOHP at a concentration of 0.1 μg/ml was correlated with ovulatory response to hormone treatment and quality of ovulated eggs. Two females exhibited higher in vitro oocyte maturation rate (100% germinal vesicle breakdown), ovulated sooner after hormone injection, and also had a higher hatching rate (77, 92%). In the F₂ bester broodstock with a lower hatching rate (10-21%), a higher incidence (15-64%) of spontaneous triploidy was found. These results indicate that maturational competence can be estimated by in vitro oocyte maturation response to 17αOHP at 0.1 μg/ml and that this is a useful technique for selecting the proper female for breeding. Ovulatory success, hatching rate and occurrence of triploidy are thus all predictable in the cultured bester.

Affiliations:

Japon

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Le document en format XML

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<term>Hatching</term>
<term>Huso huso</term>
<term>Hybrid</term>
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<term>Marine environment</term>
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<term>In vitro</term>
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<term>Acipenser sturio</term>
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<front><div type="abstract" xml:lang="en">We have investigated the relationship between maturational competence and hatching rate of eggs ovulated following injection of lutenizing hormone releasing hormone ethylamide (LH-RHa) in the cultured hybrid (bester) sturgeon (Huso huso female×Acipenser ruthenus male). Among 10 steroids tested (including progesterone) in a previous study, 17α-hydroxyprogesterone (17αOHP) was the most potent inducer of final maturation in the bester, with results similar to 17a,20p,21-trihydroxy-4-pregnen-3-one and 17α,20β-dihydroxy-4-pregnen-3-one. We therefore used 17αOHP to estimate maturational competence in the present study. In vitro oocyte maturation response to 17αOHP at a concentration of 0.1 μg/ml was correlated with ovulatory response to hormone treatment and quality of ovulated eggs. Two females exhibited higher in vitro oocyte maturation rate (100% germinal vesicle breakdown), ovulated sooner after hormone injection, and also had a higher hatching rate (77, 92%). In the F<sub>2</sub>
 bester broodstock with a lower hatching rate (10-21%), a higher incidence (15-64%) of spontaneous triploidy was found. These results indicate that maturational competence can be estimated by in vitro oocyte maturation response to 17αOHP at 0.1 μg/ml and that this is a useful technique for selecting the proper female for breeding. Ovulatory success, hatching rate and occurrence of triploidy are thus all predictable in the cultured bester.</div>
</front>
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<tree><country name="Japon"><noRegion><name sortKey="Omoto, Naotaka" sort="Omoto, Naotaka" uniqKey="Omoto N" first="Naotaka" last="Omoto">Naotaka Omoto</name>
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<name sortKey="Adachi, Shinji" sort="Adachi, Shinji" uniqKey="Adachi S" first="Shinji" last="Adachi">Shinji Adachi</name>
<name sortKey="Arai, Katsutoshi" sort="Arai, Katsutoshi" uniqKey="Arai K" first="Katsutoshi" last="Arai">Katsutoshi Arai</name>
<name sortKey="Maebayashi, Mamoru" sort="Maebayashi, Mamoru" uniqKey="Maebayashi M" first="Mamoru" last="Maebayashi">Mamoru Maebayashi</name>
<name sortKey="Yamauchi, Kohei" sort="Yamauchi, Kohei" uniqKey="Yamauchi K" first="Kohei" last="Yamauchi">Kohei Yamauchi</name>
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</record>

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The influence of oocyte maturational stage on hatching and triploidy rates in hybrid (bester) sturgeon, Huso huso × Acipneser ruthenus

The influence of oocyte maturational stage on hatching and triploidy rates in hybrid (bester) sturgeon, Huso huso × Acipneser ruthenus

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

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