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북방전복, Haliotis discus hannai의 3배체를 제온자극으로 유도하고 부화유생인 trochophore를 이용하여 염색체 표본을 만들었고, 유도된 3배체와 정상 2배체 북방전복은 실내 유수식의 동일 환경에서 51개월 동안 사육되었으며 채취된 혈구를 채취하여 DNA 함량 측정에 사용되었다. 2배체 및 유도된 3배체의 염색체 수를 조사한 결과, 2배체 염색체 수는 2n = 36으로 나타났고, 3배체의 경우에는 3n = 54로 나타나 3배체는 2배체에 비해 1.5배의 염색체 수를 나타내었다. Flow cytometry로 인간의 백혈구를 control로 하여 북방전복의 DNA 함량을 측정한 결과, 북방전복의 DNA 함량은 1.743 pg/cell이었으며 3배체 북방전복의 DNA함량은 2배체 전복의 1.49배의 DNA 함량을 나타내어 3배체 특성인 모계 2n DNA 함량과 부계 n DNA함량을 나타내었다.
In this study, we invesgated a cytogenetic analysis of the Pacific triploid abalone, Haliotis discus hannai induced by low temperature treatment. We got a lot of mitotic metaphase chromosome spreads from the triploid and diploid Pacific abalones' hatched larvae (trochophores). The chromosome number of diploid abalone was 2n = 36 and that of triploid abalone was 3n = 54, so the chromosome number of triploid abalone was 1.5 times higher than that of diploid abalone. We developed a modified flow cytometric method for Pacific abalone from the existing methods. We uesd 51 months aged triploid and diploid Pacific abalones' hemolymph to get the DNA contents by flow cytometry. The DNA content of diploid abalone was 1.743 pg/cell and the DNA content of triploid abalone was 1.49 times higher than that of diploid one. It proved that triploid abalone was consisted with two sets of maternal diploid and one set of paternal genome.
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