, a skunk cabbage genus, includes two sister groups, which are drastically different in life history traits and thermogenesis, as follows: The nonthermogenic summer flowering and thermogenic early spring flowering . Although the molecular basis of thermogenesis and complete chloroplast genome (plastome) of thermogenic have been well characterized, very little is known for that of . We sequenced the complete plastomes of sampled from Japan and Korea and compared them with that of sampled from Korea. The nonthermogenic plastomes from Japan and Korea had 158,322 and 158,508 base pairs, respectively, which were slightly shorter than the thermogenic plastome of . No structural or content rearrangements between the species pairs were found. Six highly variable noncoding regions (, , , , , and ) were identified between and and 14 hot-spot regions were also identified at the subfamily level. We found a similar total number of SSR (simple sequence repeat) motifs in two accessions of sampled from Japan and Korea. Phylogenetic analysis supported the basal position of subfamily Orontioideae and the monophyly of genus , and also revealed an unexpected evolutionary relationship between and .

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6801674PMC
http://dx.doi.org/10.3390/ijms20194678DOI Listing

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