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.
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