Electrophoretic variability within the Protogonyaulax tamarensis/catenella species complex: Pyridine linked dehydrogenases |
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| Affiliation: | 1. Entomology Research Lab, P.G. & Research Department of Zoology, College Research Centre Affiliated to University of Calicut, St. Joseph’s College (Autonomous) Devagiri, Kozhikode, Kerala 673008, India;2. Department of Zoology, University of Calicut, Malappuram, Kerala, India;1. Department of Ecological Science, Kyungpook National University, Sangju, Republic of Korea;2. Department of Vector Entomology, Kyungpook National University, Sangju, Republic of Korea;3. Department of Entomology, Kyungpook National University, Sangju, Republic of Korea;1. Department of Ecological Science, Kyungpook National University, Sangju, Republic of Korea;2. Department of Vector Entomology, Kyungpook National University, Sangju, Republic of Korea;3. Team of Protected Area, National Institute of Ecology, Seocheon-gun, Republic of Korea |
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| Abstract: | Extracts from 20 isolates of the Protogonyaulax (= Gonyaulax) tamarensis/catenella species complex from diverse geographical locations, including ten contemporaneous isolates from the same geographical population, were subjected to enzyme electrophoresis. Analysis of isozyme banding patterns produced by eight pyridine-linked dehydrogenases revealed a high degree of genetic polymorphism within and between morphotypes and geographical populations. Since there was little apparent correlation between electromorphs and variants assigned provisionally to the catenelloid or tamarensoid morphotype, and because morphological intermediates exist, the presently used morphological characters used to discriminate unequivocally between P. catenella and P. tamarensis appear to be inadequate. Nevertheless, within a given morphotype, isolates from the same location were more similar than to those from elsewhere. Isozyme electrophoresis offers a means of biochemically discriminating between isolates of this species complex, for which the plate patterns are substantially the same. |
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