Abstract
In this study, we analyzed the complete sequence of the chloroplast genome of Chrysanthemum rupestre Matsum. et Koidz., 1910, a diploid disciform capitula species of Chrysanthemum endemic to Japan, formerly classified as Ajania rupestris (Matsum. & Koidz.) Muldashev, Bot. Zhurn. (Moscow & Leningrad), 1983. The chloroplast genome of C. rupestre has a typical conserved quadripartite structure of 151,061 bp in length, comprising a large single-copy region (82,846 bp), a small single-copy region (18,301 bp), and a pair of inverted repeat regions (each 24,957 bp). Phylogenetic analysis indicated that C. rupestre clustered with other Chrysanthemum species, including another former Ajania species, Chrysanthemum pacificum Nakai, 1928. However, Ajania variifolia (C.C.Chang) Tzvelev, 1961, which is a synonym of Phaeostigma variifolium (C.C.Chang) Muldashev, 1981, was placed outside the Chrysanthemum clade, thereby implying that the former genus Ajania includes heterogeneous species.
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