Abstract
Oreocharis esquirolii, a member of Gesneriaceae, is known as Thamnocharis esquirolii, which has been regarded a synonym of the former. The species is endemic to Guizhou, southwestern China, and is evaluated as vulnerable (VU) under the International Union for Conservation of Nature (IUCN) criteria. Until now, the sequence and genome information of O. esquirolii remains unknown. In this study, we assembled and characterized the complete chloroplast (cp) genome of O. esquirolii using Illumina sequencing data for the first time. The total length of the cp genome was 154,069 bp with a typical quadripartite structure consisting of a pair of inverted repeats (IRs) of 25,392 bp separated by a large single copy region (LSC) of 85,156 bp and a small single copy region (SSC) of18,129 bp. The genome comprised 114 unique genes with 80 protein-coding genes, 30 tRNA genes, and four rRNA genes. Thirty-one repeat sequences and 74 simple sequence repeats (SSRs) were identified. Genome alignment across five plastid genomes of Gesneriaceae indicated a high sequence similarity. Four highly variable sites (rps16-trnQ, trnS-trnG, ndhF-rpl32, and ycf 1) were identified. Phylogenetic analysis indicated that O. esquirolii grouped together with O. mileensis, supporting resurrection of the name Oreocharis esquirolii from Thamnocharis esquirolii. The complete cp genome sequence will contribute to further studies in molecular identification, genetic diversity, and phylogeny.
Highlights
Oreocharis Benth. was a genus of the Gesneriaceae including 27 species [1,2].Phylogenetic researches showed that Oreocharis was not monophyletic and up to 10 other genera were transferred to the genus [3–5]
The complete cp genome sequence will contribute to further studies in molecular identification, genetic diversity, and phylogeny
O. esquirolii was found to be 154,069 bp in length with a typical quadripartite structure, comprising a pair of inverted repeats (IRa and IRb) of 25,392 bp separated by a large single copy region (LSC) region of 85,156 bp and a small single copy region (SSC)
Summary
Oreocharis Benth. was a genus of the Gesneriaceae including 27 species [1,2].Phylogenetic researches showed that Oreocharis was not monophyletic and up to 10 other genera were transferred to the genus [3–5]. Was a genus of the Gesneriaceae including 27 species [1,2]. Phylogenetic researches showed that Oreocharis was not monophyletic and up to 10 other genera were transferred to the genus [3–5]. An increasing number of new species of Oreocharis have been discovered and approximately 135 species are recorded within this genus [6,7]. Oreocharis is mainly distributed in the tropical and subtropical areas in the south and southwest of China with a few extending to neighboring countries, such as Vietnam, Thailand, and Japan [3,8–11]. Was first established by Augustin Abel Hector Léveillé in 1911 based on a collection (Esquirol 628) from Guizhou, southwestern China [12]. Based on the character of actinomorphic corolla, Wang [13] transferred this species to his newly established genus, namely
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