The Korean Journal of Malacology (한국패류학회지)

The Malacological Society of Korea (한국패류학회)
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Heterogeneous growth of the triploid Pacific oysters Crassostrea gigas created by chemical inhibition of polar body release

  • Jo, Qtae (Southeast Sea Fisheries Research Institute, NFRDI) ;
  • Han, Jong-Chul (Southeast Sea Fisheries Research Institute, NFRDI) ;
  • Hur, Yong-Baek (Southeast Sea Fisheries Research Institute, NFRDI) ;
  • Byun, Soon Kyu (Southeast Sea Fisheries Research Institute, NFRDI) ;
  • Moon, Tae-Seok (Southeast Sea Fisheries Research Institute, NFRDI)
  • Received : 2014.12.05
  • Accepted : 2014.12.24
  • Published : 2014.12.31
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Abstract

Triploids have several potential advantages over diploids in aquaculture, drawing an elevated commercial reaction into the realistic application of the techniques despite we are still in the early stage of triploid industry for the Pacific oysters Crassostrea gigas. We traced the growth performance of the triploid C. gigas for over a year from hatchery spats, which was created by manipulations of chemicals (Cytochalasin B, CB or 6-Dimethylaminopurine, 6-DMAP). The growth was clearly marked by an initial longer dormancy and following a great magnitude of heterogeneity. The dormancy was almost 9 to 10-month long or even longer and was considered as a downside of the creation. The heterogeneity was magnified by appearance of extraordinarily growing oysters in part during summer season, which could be a representative upside of the triploids. Overall, however, the results were not as positive as were expected. The longer dormancy and following heterogeneity observed in our practice could be marked as an additional negative sign of the chemical use. The present study, thus, might be highly indicative in the introduction of biological cross between tetraploid and diploid to produce natural triploid embryos.

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References

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