Genome analysis of Hibiscus syriacus provides insights of polyploidization and indeterminate flowering in woody plants

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Title
Genome analysis of Hibiscus syriacus provides insights of polyploidization and indeterminate flowering in woody plants
Author(s)
Yong Min Kim; S Kim; Namjin Koo; Ah Young Shin; S I Yeom; E Seo; Seong-Jin Park; W H Kang; M S Kim; J Park; Insu JangPan Gyu KimIksu Byeon; Min-Seo Kim; Jinhyuk ChoiGunhwan Ko; J Hwang; T Yang; S B Choi; J M Lee; K B Lim; J Lee; I Y Choi; B S Park; Suk Yoon Kwon; D Choi; Ryan W Kim
Bibliographic Citation
DNA Research, vol. 24, no. 1, pp. 71-80
Publication Year
2017
Abstract
Hibiscus syriacus (L.) (rose of Sharon) is one of the most widespread garden shrubs in the world. We report a draft of the H. syriacus genome comprised of a 1.75?Gb assembly that covers 92% of the genome with only 1.7% (33?Mb) gap sequences. Predicted gene modeling detected 87,603 genes, mostly supported by deep RNA sequencing data. To define gene family distribution among relatives of H. syriacus, orthologous gene sets containing 164,660 genes in 21,472 clusters were identified by OrthoMCL analysis of five plant species, including H. syriacus, Arabidopsis thaliana, Gossypium raimondii, Theobroma cacao and Amborella trichopoda. We inferred their evolutionary relationships based on divergence times among Malvaceae plant genes and found that gene families involved in flowering regulation and disease resistance were more highly divergent and expanded in H. syriacus than in its close relatives, G. raimondii (DD) and T. cacao. Clustered gene families and gene collinearity analysis revealed that two recent rounds of whole-genome duplication were followed by diploidization of the H. syriacus genome after speciation. Copy number variation and phylogenetic divergence indicates that WGDs and subsequent diploidization led to unequal duplication and deletion of flowering-related genes in H. syriacus and may affect its unique floral morphology. ⓒ The Author 2016. Published by Oxford University Press on behalf of Kazusa DNA Research Institute.
Keyword
DiploidizationHibiscus syriacusHomeologMultivoltinismWhole Genome Duplication
ISSN
1340-2838
Publisher
Oxford Univ Press
DOI
http://dx.doi.org/10.1093/dnares/dsw049
Type
Article
Appears in Collections:
Division of Biomedical Research > Genome Editing Research Center > 1. Journal Articles
Division of Biomaterials Research > Plant Systems Engineering Research > 1. Journal Articles
Korea Bioinformation Center > 1. Journal Articles
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