Complete mitochondrial genome of Gracilaria changii (Rhodophyta: Gracilariaceae)

Gracilaria changii is an agarophyte that has been used for agar extraction and as salads. Currently, there are only three complete mitochondrial genomes of Gracilaria species available in GenBank. We report here the complete mitogenome of G. changii from Peninsular Malaysia using next-generation sequencing. It had a total length of 25,729 bp, comprising 50 genes (25 protein-coding genes – PCGs, 2 rRNA genes, and 23 tRNA genes). The gene synteny of G. changii was similar to G. salicornia from Peninsular Malaysia with three additional tRNA genes (trnY, trnR, trnS1) in comparison to G. salicornia from Hawaii. G. changii had similar start codons (ATG) for all the PCGs, but three (rps3, rpl20, and secY) had incomplete T-stop codons. Genomic data of G. changii is useful to build a more complete dataset for phylogenetic analyses in Gracilariaceae.