Korean Journal of Plant Taxonomy (식물분류학회지)

The Korean Society of Plant Taxonomists (한국식물분류학회)
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The complete chloroplast genome sequence of Rhododendron caucasicum (Ericaceae)

  • Myounghai KWAK (National Institute of Biological Resources) ;
  • Rainer W. BUSSMANN (Institute of Botany and Bakuriani Alpine Botanical Garden, Ilia State University)
  • Received : 2023.08.18
  • Accepted : 2023.09.21
  • Published : 2023.09.30
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Abstract

Rhododendron caucasicum Pall. is a shrub distributed in the mountainous areas of the Caucasus from northeastern Türkiye towards the Caspian Sea. This study reports the first complete chloroplast genome sequence of R. caucasicum. The plastome is 199,487 base pairs (bp) long and exhibits a typical quadripartite structure comprising a large single-copy region of 107,645 bp, a small single-copy region of 2,598 bp, and a pair of identical inverted repeat regions of 44,622 bp each. It contains 143 genes, comprising 93 protein-coding genes, 42 tRNA genes, and eight rRNA genes. The large chloroplast genome size is likely due to the expansion of inverted repeats. A phylogenetic analysis of chloroplast genomes with other Rhododendron species supports previously recognized infrageneric relationship.

Keywords

Acknowledgement

This research was supported by grants from the National Institute of Biological Resources, funded by the Ministry of Environment of the Republic of Korea (Grant No. NIBR202207101). This project was carried out in collaboration under the Memorandum of Understanding signed by National Institute of Biological Resources and Ilia State University. The authors are grateful to Prof. Ohseok Kwon at Kyungpook National University for his work on this cooperative project and to Dr. Jongsun Park and Dr. Woochan Kwon at Infoboss for their assistance on assembly and annotation.

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