전자저널 > 전자저널 > Allozyme Variation of 6-Phosphogluconate Dehydrogenase in the Freshwater Snail Genus Gyraulus (Pulmonata: Planorbidae)

Allozyme Variation of 6-Phosphogluconate Dehydrogenase in the Freshwater Snail Genus Gyraulus (Pulmonata: Planorbidae)

Younghun Jung, Yun-Kyu Park and Pyung-Rim Chung

Department of Parasitology, Inha University College of Medicine, Inchon 400-103 Korea

The apple snails of the genus Pomacea have been introduced by the snail breeders illegally into Korea. Authors confirmed that the natural life cycle of at least two pomacean species, Pomacea canaliculata and P. insularus, has been already settled down locally in the southern areas of Korea. 6-phosphogluconate dehydrogenase (PGD) in the two different chromosomal ploidy groups of Gyraulus were compared. The monomeric or dimeric banding patterns or allelic variations in a locus of PGD were observed in four diploid populations (Osan, Sohre, Kimpo and Kangwha) of G. convexiusculus occurring in Korea, whereas the isozyme banding patterns encoded by at least 3 different loci were shown in the tetraploid populations of G. (Torquis) groups collected from Michigan, the U.S.A. Of 3 different tetraploid groups, G. (T.) circumstriatus group showed 3 monomorphic isozyme banding patterns, and the other 2 populations showed some allelic variations. Such results provided good evidence to differentiate tetraploid subgenus Torquis group from the diploid Gyraulus populations.

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