| Summary: | Here, we sequenced the complete mitogenome of ‘Hainong No.1’, a hybrid Saccharina cultivar produced by crossing the cultivars ‘Zaohoucheng’ (♂) and ‘Pingbancai’ (♀). Circular mapping revealed that the mitogenome was 37,657 bp in length and had an overall AT content of 64.66%, including 35 protein-encoding genes, three ribosomal RNA genes (rRNA), 25 transfer RNA genes (tRNA) and three open reading frames (ORF). A phylogenetic tree constructed from the amino acids separated the six cultivars into two groups; ‘Hainong No.1’ had a closer evolutionary relationship with the cultivars ‘Zaohoucheng’, ‘Pingbancai’ and ‘Ailunwan’, whereas ‘Rongfu’ and ‘Fujian’ formed a distinct cluster. Further comparison between the ‘Hainong No.1’ and the parental mitogenomes displayed that ‘Pingbancai’ and ‘Zaohoucheng’ were the female and male parents, respectively.
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