Genetic population structure of the spear squid Loligo bleekeri based on mitochondrial DNA

Publication Type:Journal Article
Year of Publication:2006
Authors:K. Ito, Yanagimoto, T., Iwata, Y., Munehara, H., Sakurai, Y.
Journal:Nippon Suisan Gakkaishi
Date Published:Sep
ISBN Number:0021-5392
Accession Number:ISI:000241993300015
Keywords:Loligo bleekeri

The sequence of the mitochondrial DNA noncoding region 4 (mtDNA NC4) was analyzed to investigate the genetic population structure of the spear squid Loligo bleekeri using 545 individiduals captured at six sites around Japan. MtDNA NC4 sequences of 506-528 bp were determined. A total of 55 variable nucleotide sites were detected, defining 48 haplotypes. The average haplotype diversity (0.670) and average nucleotide diversity (0.003) indicated a low level of genetic diversity in the spear squid. Analysis of molecular variation (AMOVA) indicated that most of the genetic variation was distributed within populations. The analysis of haplotype frequency distribution and F-ST values showed no significant difference among the six sampling sites. These data indicate no genetic structuring of spear squid population around Japan.

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