Mitochondrial and chloroplast genome sequences of Ulva ohnoi, a green-tide-forming macroalga in the Southern coastal regions of Japan.

Ulva is a green macroalga often causing a macroalgal bloom, 'green tide'. Ulva ohnoi is a major species composing the green tide of the southern coastal regions of Japan. Here, we sequenced the complete mitochondrial and chloroplast genomes of the authentic strain of U. ohnoi. The mitochondrial and chloroplast genomes were of 65,326 bp and 103,313 bp, respectively, and the gene content was highly conserved in the Ulva species. The phylogenetic analyses using mitochondrial or chloroplast proteins represented the same topology with high supporting values. These results show that mitochondrial and chloroplast genomes can be used as reliable phylogenetic markers.