Abstract
Capsella rubella (C. rubella) is a highly selfing plant species, mostly occurring in southern and western Europe. As a member of the closest well-characterized genus (Capsella) to Arabidopsis thaliana (A. thaliana), C. rubella has been studied by botanists in recent years. In this study, we successfully assembled the complete mitochondrial (mt) DNA sequence of C. rubella into a circular genome of 287,405-bp length, encoding 31 protein-coding genes (PCGs), 21 tRNA genes, and 3 rRNA genes. The GC content of the C. rubella mt genome is 44.74%, which shows a prevalent GC content within Brassicaceae plant species. The reconstructed neighbour-joining tree supported that C. rubella was evolutionarily close to A. thaliana and Brassica napus (B. napus), both of which belong to Brassicaceae. This worthwhile research of C. rubella mt genome will not only provide a valuable reference for model plant A. thaliana, but also contribute to the study of the evolution of self-incompatibility to self-compatibility.
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