Study of the reproductive potential of triploid oysters
Reproduction was studied in triploid Crassostrea gigas, by crossing gametes from diploid and triploid parents.Triploids are able to produce viable gametes and their resulting progeny consisted in diploids, aneuploids and polyploids. Gametes from triploid parents frequently led to abnormal polar body...
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8th International Conference on Shellfish Restoration
2005
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ftarchimer:oai:archimer.ifremer.fr:3319 2023-05-15T15:57:48+02:00 Study of the reproductive potential of triploid oysters Normand, Julien Boudry, Pierre Cornette, Florence Ledu, Christophe 2005-10-05 application/pdf https://archimer.ifremer.fr/doc/2005/acte-3319.pdf https://archimer.ifremer.fr/doc/00000/3319/ eng eng 8th International Conference on Shellfish Restoration https://archimer.ifremer.fr/doc/2005/acte-3319.pdf https://archimer.ifremer.fr/doc/00000/3319/ info:eu-repo/semantics/openAccess restricted use Triploid Genetic Oysters Crassostrea gigas text Poster info:eu-repo/semantics/conferenceObject 2005 ftarchimer 2021-09-23T20:15:16Z Reproduction was studied in triploid Crassostrea gigas, by crossing gametes from diploid and triploid parents.Triploids are able to produce viable gametes and their resulting progeny consisted in diploids, aneuploids and polyploids. Gametes from triploid parents frequently led to abnormal polar body formation, even before caryogamy occurred. A high frequency of aneuploids was observed, related to the missegregation of chromosomes during meiosis in triploids. This might be due to the observed incomplete synapsis in triploid eggs during Prophase I. The proportion of aneuploids decreased during larval development, reflecting differential mortality between ploidy levels. Due to limited gonadic development and high larval mortality rates, the reproductive potential (up to the pediveligere stage) of triploids was about 5.44% (female 2n x male 3n) and 1.47% (female 3n x male 2n) relative to crosses between diploids. Interestingly, polyploid larvae were mostly found in female 3n x male 2n progenies. Our results will be discussed from biological and environmental points of view. Conference Object Crassostrea gigas Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
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Open Polar |
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Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
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ftarchimer |
language |
English |
topic |
Triploid Genetic Oysters Crassostrea gigas |
spellingShingle |
Triploid Genetic Oysters Crassostrea gigas Normand, Julien Boudry, Pierre Cornette, Florence Ledu, Christophe Study of the reproductive potential of triploid oysters |
topic_facet |
Triploid Genetic Oysters Crassostrea gigas |
description |
Reproduction was studied in triploid Crassostrea gigas, by crossing gametes from diploid and triploid parents.Triploids are able to produce viable gametes and their resulting progeny consisted in diploids, aneuploids and polyploids. Gametes from triploid parents frequently led to abnormal polar body formation, even before caryogamy occurred. A high frequency of aneuploids was observed, related to the missegregation of chromosomes during meiosis in triploids. This might be due to the observed incomplete synapsis in triploid eggs during Prophase I. The proportion of aneuploids decreased during larval development, reflecting differential mortality between ploidy levels. Due to limited gonadic development and high larval mortality rates, the reproductive potential (up to the pediveligere stage) of triploids was about 5.44% (female 2n x male 3n) and 1.47% (female 3n x male 2n) relative to crosses between diploids. Interestingly, polyploid larvae were mostly found in female 3n x male 2n progenies. Our results will be discussed from biological and environmental points of view. |
format |
Conference Object |
author |
Normand, Julien Boudry, Pierre Cornette, Florence Ledu, Christophe |
author_facet |
Normand, Julien Boudry, Pierre Cornette, Florence Ledu, Christophe |
author_sort |
Normand, Julien |
title |
Study of the reproductive potential of triploid oysters |
title_short |
Study of the reproductive potential of triploid oysters |
title_full |
Study of the reproductive potential of triploid oysters |
title_fullStr |
Study of the reproductive potential of triploid oysters |
title_full_unstemmed |
Study of the reproductive potential of triploid oysters |
title_sort |
study of the reproductive potential of triploid oysters |
publisher |
8th International Conference on Shellfish Restoration |
publishDate |
2005 |
url |
https://archimer.ifremer.fr/doc/2005/acte-3319.pdf https://archimer.ifremer.fr/doc/00000/3319/ |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_relation |
https://archimer.ifremer.fr/doc/2005/acte-3319.pdf https://archimer.ifremer.fr/doc/00000/3319/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
_version_ |
1766393505420148736 |