Comparative analysis of complete plastid genome reveals powerful barcode regions for identifying wood of Dalbergia odorifera and D. tonkinensis (Leguminosae)  

作　　者：Ming Qin Cheng-Jie Zhu Jun-Bo Yang Mohammad Vatanparast Rowan Schley Qiang Lai Dan-Yan Zhang Tie-Yao Tu Bente B.Klitgard Shi-Jin Li Dian-Xiang Zhang 

机构地区：[1]Key Laboratory of Plant Resources Conservation and Sustainable Utilization,South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Shenzhen Academy of Metrology and Quality Inspection,Shenzhen 518109,China [4]Germplasm Bank of Wild Species,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650201,China [5]Department of Geosciences and Natural Resource Management,University of Copenhagen,1958 Frederiksberg,Denmark [6]US National Herbarium,Department of Botany,Smithsonian Institution-NMNH,Washington,DC 20560,USA [7]Herbarium,Royal Botanic Gardens,Kew,Richmond,Surrey TW93AE,UK [8]School of Pharmaceutical Science,Guangzhou University of Chinese Medicine,Guangzhou 510006,China

出　　处：《Journal of Systematics and Evolution》2022年第1期73-84,共12页植物分类学报（英文版）

基　　金：This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDA13020501);the National Natural Science Foundation of China(Grant No.31670193);Publicity and Education Base Construction of Guangdong Forestry Science&Technology(Grang No.2019-08);Science and Technology Planning Project of Guangdong Province(Grang No.2019B030316020).

摘　　要：Dalbergia odorifera T.C.Chen(Leguminosae),a rare and endangered tree species endemic to Hainan Island of China,produces the most expensive and rarest wood in China.The wood characteristics of D.odorifera are remarkably similar to those of D.tonkinensis(a much less sought-after species from Vietnam),and the DNA from wood is often highly degraded,making it very difficult to identify the two species using anatomical features or DNA barcoding based on regular DNA markers.To solve the confusion of identifying wood reliably from the two species,we built and analyzed the plastome library of 26 samples from 18 Dalbergia species,of which 12 samples from eight closely related species of D.odorifera are newly sequenced in this study.Phylogenomic analysis suggested that the relationships among the 26 samples are mostly well resolved,and conspecific individuals from different populations of D.odorifera and D.tonkinensis clustered together.Between the plastid genomes of the two species,we identified 129 indels and 114 single nucleotide polymorphisms.By assessing a subset of 20 nucleotide polymorphisms and 10 indels using 37 population-level samples(20 samples of D.odorifera and 17 samples of D.tonkinensis),we recovered eight species-specific barcode regions that could be suitable for identifying the wood D.odorifera and D.tonkinensis.To examine their utility in wood identification,we amplified the eight DNA barcodes using six wood samples and recovered an amplification success rate of 83.3%,demonstrating a reliable method for precise wood identification of the two species.

关 键 词：DNA barcoding FABACEAE Hongmu PHYLOGENOMICS ROSEWOOD wood identification 

分 类 号：Q943.2[生物学—植物学]