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Polymorphism in Nucleotide Sequence of Mitochondrial Intergenic Region in Scleractinian Coral (Galaxea fascicularis)
Authors:Toshiki Watanabe  Mutsumi Nishida  Katsutoshi Watanabe  Defny S. Wewengkang  Michio Hidaka
Affiliation:(1) Division of Marine Biosciences, Ocean Research Institute, University of Tokyo, 1-15-1 Minamidai, Nakano Tokyo, 164-8639, Japan;(2) Department of Zoology, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku Kyoto, 606-8502, Japan;(3) Department of Chemistry, Biology and Marine Sciences, Faculty of Science, University of the Ryukyus, 1-Senbaru, Nishihara-cho Okinawa, 903-0213, Japan
Abstract:A region of 826 bp that is unlikely to code for a protein, ribosomal RNA, or transfer RNA was identified between the cytochrome b and NADHubiquinone oxidoreductase chain 2 loci in the mitochondrial DNA of the scleractinian reef coral Galaxea fascicularis. Nucleotide sequences were determined in a part (625 bp) of this intergenic region in 95 individuals collected at 9 sites in the Ryukyu Archipelago in southwestern Japan. A total of 8 haplotypes were found, and a deletion of 290 bp was found in 3 of them. Significant differences were found in frequencies of the haplotypes at 3 sampling sites. The presence or absence of the deletion was highly correlated with the hard or soft morphotype. The deletion was found in the majority of hard-type colonies, but in a small fraction of soft-type individuals.
Keywords:coral  mitochondrial DNA  Scleractinia  polymorphism  intergenic sequence  morphotype
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