Overdominance of a Muscle Protein ( Mp -1) Locus in the Japanese Oyster, Crassostrea gigas (Ostreidae)
A microgeographical population genetic study of the Japanese oyster, Crassostrea gigas, revealed a case of overdominance for a muscle protein (Mp-1) locus. This locus consists of a two allele polymorphism. A study of the relative "fitness" of the three genotypes (Mp-1 105/105 , Mp-1 105/10...
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1979
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Online Access: | http://dx.doi.org/10.1139/f79-189 http://www.nrcresearchpress.com/doi/pdf/10.1139/f79-189 |
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crcansciencepubl:10.1139/f79-189 2023-12-17T10:29:02+01:00 Overdominance of a Muscle Protein ( Mp -1) Locus in the Japanese Oyster, Crassostrea gigas (Ostreidae) Buroker, N. E. 1979 http://dx.doi.org/10.1139/f79-189 http://www.nrcresearchpress.com/doi/pdf/10.1139/f79-189 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 36, issue 11, page 1313-1318 ISSN 0015-296X General Medicine journal-article 1979 crcansciencepubl https://doi.org/10.1139/f79-189 2023-11-19T13:38:45Z A microgeographical population genetic study of the Japanese oyster, Crassostrea gigas, revealed a case of overdominance for a muscle protein (Mp-1) locus. This locus consists of a two allele polymorphism. A study of the relative "fitness" of the three genotypes (Mp-1 105/105 , Mp-1 105/100 , and Mp-1 100/100 ) revealed a heterozygote superiority in the segment of the oyster population at the lowest tidal level (+ 1.2 m). In segments of the population at higher tidal heights (i.e. + 1.8 and + 2.4 m), there appears to be a selective advantage for Mp-1 105 allele since the highest "fitness" values belong to the Mp-1 105/105 genotype. Since oysters do not appear at the field station lower than 1.2 tidal m, it could not be determined if the Mp-1 100 allele had a selective advantage at tidal levels lower than 1.2 m. However, the Mp-1 105 allele possibly exhibits a selective advantage in the subtropical marine environment of southern Japan, while the Mp-1 100 allele is favored in the temperate marine environment of northern Japan. This suggests perhaps that a micro- and macrogeographical cline in gene frequency exists for the Mp-1 locus due to a thermal gradient. Key words: Japanese oyster, Crassostrea gigas, population genetic study, overdominance, heterozygote superiority, Mp-1 locus, micro- and macrogeographical cline, thermal gradient, tidal height, latitude Article in Journal/Newspaper Crassostrea gigas Canadian Science Publishing (via Crossref) Journal of the Fisheries Research Board of Canada 36 11 1313 1318 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Medicine |
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General Medicine Buroker, N. E. Overdominance of a Muscle Protein ( Mp -1) Locus in the Japanese Oyster, Crassostrea gigas (Ostreidae) |
topic_facet |
General Medicine |
description |
A microgeographical population genetic study of the Japanese oyster, Crassostrea gigas, revealed a case of overdominance for a muscle protein (Mp-1) locus. This locus consists of a two allele polymorphism. A study of the relative "fitness" of the three genotypes (Mp-1 105/105 , Mp-1 105/100 , and Mp-1 100/100 ) revealed a heterozygote superiority in the segment of the oyster population at the lowest tidal level (+ 1.2 m). In segments of the population at higher tidal heights (i.e. + 1.8 and + 2.4 m), there appears to be a selective advantage for Mp-1 105 allele since the highest "fitness" values belong to the Mp-1 105/105 genotype. Since oysters do not appear at the field station lower than 1.2 tidal m, it could not be determined if the Mp-1 100 allele had a selective advantage at tidal levels lower than 1.2 m. However, the Mp-1 105 allele possibly exhibits a selective advantage in the subtropical marine environment of southern Japan, while the Mp-1 100 allele is favored in the temperate marine environment of northern Japan. This suggests perhaps that a micro- and macrogeographical cline in gene frequency exists for the Mp-1 locus due to a thermal gradient. Key words: Japanese oyster, Crassostrea gigas, population genetic study, overdominance, heterozygote superiority, Mp-1 locus, micro- and macrogeographical cline, thermal gradient, tidal height, latitude |
format |
Article in Journal/Newspaper |
author |
Buroker, N. E. |
author_facet |
Buroker, N. E. |
author_sort |
Buroker, N. E. |
title |
Overdominance of a Muscle Protein ( Mp -1) Locus in the Japanese Oyster, Crassostrea gigas (Ostreidae) |
title_short |
Overdominance of a Muscle Protein ( Mp -1) Locus in the Japanese Oyster, Crassostrea gigas (Ostreidae) |
title_full |
Overdominance of a Muscle Protein ( Mp -1) Locus in the Japanese Oyster, Crassostrea gigas (Ostreidae) |
title_fullStr |
Overdominance of a Muscle Protein ( Mp -1) Locus in the Japanese Oyster, Crassostrea gigas (Ostreidae) |
title_full_unstemmed |
Overdominance of a Muscle Protein ( Mp -1) Locus in the Japanese Oyster, Crassostrea gigas (Ostreidae) |
title_sort |
overdominance of a muscle protein ( mp -1) locus in the japanese oyster, crassostrea gigas (ostreidae) |
publisher |
Canadian Science Publishing |
publishDate |
1979 |
url |
http://dx.doi.org/10.1139/f79-189 http://www.nrcresearchpress.com/doi/pdf/10.1139/f79-189 |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
Journal of the Fisheries Research Board of Canada volume 36, issue 11, page 1313-1318 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f79-189 |
container_title |
Journal of the Fisheries Research Board of Canada |
container_volume |
36 |
container_issue |
11 |
container_start_page |
1313 |
op_container_end_page |
1318 |
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1785581299548815360 |