What question did this study set out to answer?

To assemble and analyze the mitochondrial genome of Cornus officinalis to clarify its phylogenetic position.

April 24, 2026Mitochondrial DNA Part B0 citationsOpen Access

The complete mitochondrial genome of Cornus officinalis reveals a multipartite structure and clarifies its phylogenetic position

MOMary Tolulope OlutayoWuhan Botanical Garden ZJZhuo JiangWuhan Botanical Garden HZHui-lin ZhouNanjing Normal University

Key Points

To assemble and analyze the mitochondrial genome of Cornus officinalis to clarify its phylogenetic position.
Assembled the mitochondrial genome using PacBio HiFi sequencing data.
Identified 70 genes, including protein-coding, transfer RNA, and ribosomal RNA genes.
Conducted phylogenetic analysis based on mitochondrial protein-coding genes.
The mitogenome consists of three circular molecules totaling 556,620 bp.
C. officinalis groups with Hydrangeaceae, Ericaceae, and Primulaceae in phylogenetic analyses.
This research provides the first mitochondrial genome for the Cornaceae family.

Abstract

Cornus officinalis Siebold & Zucc. 1839 is a medicinally important species of Cornaceae, yet mitochondrial genomic information for this genus has remained unavailable. In this study, we assembled and annotated the mitochondrial genome of C. officinalis using PacBio HiFi sequencing data. The mitogenome comprises three circular molecules totaling 556,620 bp with similar GC contents of approximately 45%. A total of 70 genes were identified, including 43 protein-coding genes, 23 transfer RNA genes, and four ribosomal RNA genes. Phylogenetic analysis based on mitochondrial protein-coding genes placed C. officinalis in a well-supported clade with Hydrangeaceae, Ericaceae, and Primulaceae. This first mitochondrial genome reported for Cornaceae provides a useful resource for mitochondrial genome evolution and angiosperm phylogenetic studies.

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