首页|Genetic diversity of food-medicinal Lycium spp.in China:Insights from chloroplast genome
Genetic diversity of food-medicinal Lycium spp.in China:Insights from chloroplast genome
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Objective:Goji(fruits of Lycium spp.)is commonly consumed as food and medicine.The increasing mar-ket demand for goji has led to its wide cultivation and broad breeding,which might cause loss of genetic diversity.This study aims to uncover the genetic diversity of the cultivated and wild Lycium.Methods:The chloroplast genome(CPG)of 34 accessions of Chinese food-medicinal Lycium spp.,includ-ing the popular cultivars and their wild relatives,was re-sequenced and assembled,based on which the genetic diversity was evaluated.Results:Sequence structural comparison shows that CPG is comparatively conserved within species.Phylogenetic analysis indicates that CPG is sufficient for the discrimination of Lycium species;combined with nuclear ribosomal internal transcribed spacer(Nr ITS)sequences,materials with mixed genetic backgrounds can be identified.Nucleotide diversity analysis reveals that the modern cultivars are prob-ably with a common maternal parent,while the wild accessions are with higher level of genetic diversity.Conclusion:For the first time this study reveals the intraspecies genetic diversity of Lycium spp.using CPG,highlighting the urgent conservation demand of wild genetic resources of Lycium.Our study also demonstrates that CPG provides crucial evidence for identification of Lycium species with mixed genetic backgrounds and highlights the importance of the wild relatives in genetic diversity conservation.This CPG-based technology will contribute to the sustainable development of medicinal plants broadly.
Institute of Medicinal Plant Development,Chinese Academy of Medical Sciences and Peking Union Medical College,Beijing 100193,China
Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650201,China
Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine,Hainan Branch of the Institute of Medicinal Plant Development,Chinese Academy of Medical Sciences and Peking Union Medical College,Haikou 570311,China
Research Group'Pharmacognosy and Phytotherapy',UCL School of Pharmacy,University of London,London WC1N1AX,United Kingdom
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International Postdoctoral Exchange Fellowship ProgramChina Postdoctoral Science FoundationCAMS Initiative for Innovative MedicineCAMS Innovation Fund for Medical SciencesIntroducing Talents Startup Fund of Kunming Institute of Botany,Chinese Academy of Sciences
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