The complex jujube genome provides insights into fruit tree biology
M. Liu, J. Zhao, Q. Cai, G. Liu, J. Wang, Z. Zhao, P. Liu, L. Dai, Guijun Yan, W. Wang, X. Li, Y. Chen, Y. Sun, Z. Liu, M. Lin, J. Xiao, B. Wu., Y. Ma, J. Jian, W. Yang
Research output: Contribution to journal › Article
© 2014 Macmillan Publishers Limited. All rights reserved. The jujube (Ziziphus jujuba Mill.), a member of family Rhamnaceae, is a major dry fruit and a traditional herbal medicine for more than one billion people. Here we present a high-quality sequence for the complex jujube genome, the first genome sequence of Rhamnaceae, using an integrated strategy. The final assembly spans 437.65Mb (98.6% of the estimated) with 321.45Mb anchored to the 12 pseudo-chromosomes and contains 32,808 genes. The jujube genome has undergone frequent inter-chromosome fusions and segmental duplications, but no recent whole-genome duplication. Further analyses of the jujube-specific genes and transcriptome data from 15 tissues reveal the molecular mechanisms underlying some specific properties of the jujube. Its high vitamin C content can be attributed to a unique high level expression of genes involved in both biosynthesis and regeneration. Our study provides insights into jujube-specific biology and valuable genomic resources for the improvement of Rhamnaceae plants and other fruit trees.