The Larix kaempferi genome reveals new insights into wood properties

作     者：Chao Sun Yun-Hui Xie Zhen Li Yan-Jing Liu Xiao-Mei Sun Jing-Jing Li Wei-Peng Quan Qing-Yin Zeng Yves Van de Peer Shou-Gong Zhang Chao Sun;Yun-Hui Xie;Zhen Li;Yan-Jing Liu;Xiao-Mei Sun;Jing-Jing Li;Wei-Peng Quan;Qing-Yin Zeng;Yves Van de Peer;Shou-Gong Zhang

作者机构：State Key Laboratory of Tree Genetics and BreedingChinese Academy of ForestryBeijing 100091China Key Laboratory of Tree Breeding and Cultivation of the State Forestry and Grassland AdministrationResearch Institute of ForestryChinese Academy of ForestryBeijing 100091China Department of Plant Biotechnology and BioinformaticsGhent UniversityGent B‐9052Belgium VIB Center for Plant Systems BiologyGhent B‐9052Belgium Nextomics Biosciences Co.LtdWuhan 430073China Department of BiochemistryGenetics and MicrobiologyPretoriaSouth Africa 

出 版 物：《Journal of Integrative Plant Biology》 (植物学报（英文版）)

年 卷 期：2022年第64卷第7期

页      面：1364-1373页

核心收录：

学科分类：0710[理学-生物学] 08[工学] 0829[工学-林业工程] 

基　　金：funded by the Forestry Industry Research Special Funds for Public Welfare Projects(201504104) National Natural Science Foundation of China(31901335) Fundamental Research Funds for the Central Non-profit Research Institution of CAF(CAFYBB2017QA001,CAFYBB 2018ZY001-4,LYSZX202002) National Transgenic Major Program(2018ZX08020-003) funded by a postdoctoral fellowship from the Special Research Fund of Ghent University(BOFPDO2018001701)。 

主　　题：evolution gene expression genome Larix kaempferi wood properties 

摘      要：Here,through single-molecule real-time sequencing,we present a high-quality genome sequence of the Japanese larch(Larix kaempferi),a conifer species with great value for wood production and ecological afforestation.The assembled genome is 10.97 Gb in size,harboring 45,828 protein-coding genes.Of the genome,66.8%consists of repeat sequences,of which long terminal repeat retrotransposons are dominant and make up 69.86%.We find that tandem duplications have been responsible for the expansion of genes involved in transcriptional regulation and stress responses,unveiling their crucial roles in adaptive evolution.Population transcriptome analysis reveals that lignin content in L.kaempferi is mainly determined by the process of monolignol polymerization.The expression values of six genes(LkC OMT7,LkC OMT8,LkL AC23,LkL AC102,LkP RX148,and LkP RX166)have significantly positive correlations with lignin content.These results indicated that the increased expression of these six genes might be responsible for the high lignin content of the larches’wood.Overall,this study provides new genome resources for investigating the evolution and biological function of conifer trees,and also offers new insights into wood properties of larches.