The chloroplast genome of Paeonia decomposita (Paeoniaceae), an endangered wild tree peony from Sichuan, China
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TECHNICAL NOTE
The chloroplast genome of Paeonia decomposita (Paeoniaceae), an endangered wild tree peony from Sichuan, China Yongmei Chen1 · Qiujie Zhou2 · Lijin Sun1 · Wei Lun Ng2 · Renchao Zhou2 · Wei Wu2 Received: 29 November 2017 / Accepted: 30 December 2017 © Springer Science+Business Media B.V., part of Springer Nature 2018
Abstract Paeonia decomposita (Paeoniaceae) is an endangered wild tree peony endemic to northwestern Sichuan, China. It was categorized as ‘Endangered’ in the IUCN category and one of the National Key Protected Wild Plants (Class 2). Here we assemble and annotate the complete chloroplast genome of P. decomposita from Illumina paired-end sequencing data. The chloroplast genome size of P. decomposita is 152,601 bp, containing a pair of inverted repeats of 25,650 bp, a small single copy of 17,036 bp and a large single copy of 84,265 bp. The overall GC content of the chloroplast genome is 38.38%. A total of 129 genes were annotated, including 82 protein-coding genes, 39 tRNA genes and eight rRNA genes. In addition, phylogenetic analysis of ten selected chloroplast genomes revealed that P. decomposita was sister to the clade including P. ludlowii and P. delavayi. Keywords Paeonia decomposita · Chloroplast genome · Phylogenetic analysis Paeonia decomposita (Paeoniaceae) is a wild tree peony that is endemic to northwestern Sichuan, China (Fu 1992). It occurs only in high elevations (2050–3100 m) with cold and arid environment. Because of its rarity, P. decomposita was categorized as ‘Endangered’ in the IUCN category (http:// rep.iplant.cn/prot/Paeonia%20decomposita) and one of the National Key Protected Wild Plants (Class 2) (Fu 1992). Although P. decomposita is not involved in the domestication of traditional cultivated tree peonies in China (Zhou et al. 2014), it is a potentially important genetic resource to develop new cultivars. In addition, P. decomposita can also be used as an excellent medical and oil plant (Fu 1992; Zhou et al. 2014). In our recent field survey, we found that the natural populations of P. decomposita declined dramatically due to human disturbance and excavation for medical use. To scientifically conserve and utilize this wild tree peony, a better understanding of its genomic information becomes increasingly urgent. So far, little genomic information has * Wei Wu [email protected] 1
School of Chemical Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
2
been available for some closely related species, P. suffruticosa, P. rockii, P. ludlowii and P. delavayi (Zhou et al. 2013; Bai et al. 2017; Li et al. 2017). Therefore, we sequenced the chloroplast genome of P. decomposita, which may contribute to its conservation and utilization. Leaves of a single individual of P. decomposita were collected from a wild population in Barkam, Sichuan, China, and genomic DNA wa
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