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Authors: Yan, Liang and Wang, Xiao and Liu, Hui and Tian, Yang and Lian, Jinmin and Yang, Ruijuan and Hao, Shumei and Wang, Xuanjun and Yang, Shengchao and Li, Qiye and Qi, Shuai and Kui, Ling and Okpekum, Moses and Ma, Xiao and Zhang, Jiajin and Ding, Zhaoli and Zhang, Guojie and Wang, Wen and Dong, Yang and Sheng, Jun

Dendrobium officinale Kimura et Migo is a traditional Chinese orchid herb that has both ornamental value and a broad range of therapeutic effects. Here, we report the first de novo assembled 1.35 Gb genome sequences for D. officinale by combining the second-generation Illumina Hiseq 2000 and third-generation PacBio sequencing technologies. We found that orchids have a complete inflorescence gene set and have some specific inflorescence genes. We observed gene expansion in gene families related to fungus symbiosis and drought resistance. We analyzed biosynthesis pathways of medicinal components of D. officinale and found extensive duplication of SPS and SuSy genes, which are related to polysaccharide generation, and that the pathway of D. officinale alkaloid synthesis could be extended to generate 16-epivellosimine. The D. officinale genome assembly demonstrates a new approach to deciphering large complex genomes and, as an important orchid species and a traditional Chinese medicine, the D. officinale genome will facilitate future research on the evolution of orchid plants, as well as the study of medicinal components and potential genetic breeding of the dendrobe. Copyright © 2015 The Author. Published by Elsevier Inc. All rights reserved.

Journal: Molecular plant
DOI: 10.1016/j.molp.2014.12.011
Year: 2015

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