A Chromosome-Level Genome Assembly of Toona ciliata (Meliaceae). (26th July 2022)

• Record Type: Journal Article
• Authors: Wang, Xi; Xiao, Yu; He, Zi-Han; Li, Ling-Ling; Song, Hui Yun; Zhang, Jun-Jie; Cheng, Xiang; Chen, Xiao-Yang; Li, Pei; Hu, Xin-Sheng
• Editors: Tenaillon, Maud
• Is Part Of: Genome biology and evolution. Volume 14:Number 8(2022)
• Publication Date: 2022-07-26
• Subjects: Meliaceae -- Toona ciliata -- Nanopore -- Hi-C -- phylogenetic evolution; Genomics -- Periodicals; Genes -- Periodicals; 572.8605
• DOI: 10.1093/gbe/evac121
• Languages: English
• ISSNs: 1759-6653

Abstract

Abstract: Toona ciliata Roem is an important timber species in the Toona genus of the Meliaceae family and an endangered species due to over-cutting and a low rate of natural regeneration in China. Although molecular markers have been applied to studying population genetic diversity, the absence of a reliable reference genome limits in-depth genetic conservation and evolutionary studies of this species. Here, we reported a high-quality assembly of the whole genome sequence of T. ciliata . The total assembled genome has 520.64 Mb in length anchored on 28 chromosomes (contig N50 = 4.48 Mb). A total of 42, 159 genes were predicted after the ab initio, homology-based, and transcriptome analyses. A total of 41, 284 protein-encoding genes (97.92%) were functionally annotated and 1, 246 non-coding RNAs were identified in the T. ciliata genome. Phylogenomic analysis showed that T. ciliata was divergent at 15.06 (6–25) Ma from T. sinensis of the same genus Toona . This whole genome sequence provides a valuable resource to study the genetic conservation and molecular evolution of T. ciliata in the future.