Abstract
The complete mitochondrial genomes of two spine-color individuals, red and white, of the tropical sea urchin species Tripneustes gratilla (Linnaeus, 1758) were sequenced on Illumina system platform. The red-spined species had a genome size of 15,774 bp, while the white-spined species had a genome size of 15,723 bp. Both genomes contained 13 protein-coding genes, 2 rRNA genes, and 22 tRNA genes. The GC composition in both species was above 40%. In order to investigate the phylogenetic relationships of two different spine-color individuals, a comprehensive analysis was conducted using eight complete mitochondrial genomic sequences of the genus Tripneustes on the software MEGA X. It was observed that the two spine color types of T. gratilla species showed a high similarity of 98.91%. However, different color-spined species of T. gratilla were found in separate branches of the phylogenetic tree of the same sea urchin species.
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