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마루자주새우[Crangon hakodatei (Rathbun, 1902)]의 전장 미토콘드리아 유전체에 대한 분석 연구
김경률 ( Gyungryul Kim ),김현우 ( Hyun-woo Kim ) 한국수산과학회(구 한국수산학회) 2016 한국수산과학회지 Vol.49 No.6
Although shrimps belonging to family Crangonidae are known to be genetically divergent and ecologically important among the various benthos, any of their mitochondrial genome has not been reported yet. We here determined the complete mitochondrial genome sequence of Crangon hakodatei (Rathbun, 1902), which was collected from East China Sea (124°E and 34.5°N). Total mitochondrial genome length of C. hakodatei was 16,060 bp, in which 13 proteins, 2 ribosomal RNAs, 22 transfer RNAs and a putative control region were encoded. Secondary structure prediction analysis showed that twenty tRNA genes exhibit the conserved structure but two genes, tRNA<sup>Cys</sup> and tRNA<sup>Ser</sup> (AGN), lack T and D arm, respectively. Based on the sequence similarity of the COI region from the currently reported five species belonging to genus Crangonidae, C. hakodatei was most closely related to Crangon crangon. Phylogenetic analysis of full COXI genes belonging to infraorder Caridea showed that only crangonid shrimps were clustered together with those of Dendrobranchiata. Gene order were well conserved from Penaeoidea to Caridea but tRNA<sup>Pro</sup> and tRNA<sup>Thr</sup> in Palaemonid shrimp were flipped each other by the recombination. Further study about mitochondrial genome sequences of shrimps belonging to Crangonidae should be made to know better about their evolutional relationships with other those in infraorder Caridea.