Journal
JOURNAL OF APPLIED PHYCOLOGY
Volume 22, Issue 3, Pages 243-251Publisher
SPRINGER
DOI: 10.1007/s10811-009-9452-7
Keywords
Japanese kelp; Mitochondorial DNA; Saccharina; Sequencing; Species identification
Funding
- Ministry of Education, Science, Sports and Culture, Japan [18570077]
- Grants-in-Aid for Scientific Research [22580192] Funding Source: KAKEN
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The complete mitochondrial DNA (mtDNA) was sequenced for four Saccharina species including three varieties of Saccharina japonica in Hokkaido: S. japonica; S. japonica var. religiosa; S. japonica var. ochotensis; S. japonica var. diabolica; Saccharina longipedalis; Saccharina angustata; and Saccharina coriacea. Furthermore, the structure and the sequence were compared among them. The total nucleotide length was 37,500-37,657 bp. All mtDNAs were mapped and no differences in the organization of the coding region were found. From the total alignment of S. japonica including the three varieties and S. longipedalis, nucleotide substitutions were detected at 68 sites, and a nucleotide insertion/deletion was detected at one site on rps19 for the whole genome. Variable regions useful for varieties distinction of S. japonica were trnI, trnM, rps19, ORF41, and seven spacers. The pairwise distance between S. japonica, S. angustata, and S. coraiacea was 0.000-0.116. Sequencing comparisons of rps7, rps11, rpl5, and tatC were thought to be useful tools for discrimination and phylogenetic analysis of Saccharina species having similar morphologies.
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