Genome analysis of Hibiscus syriacus provides insights of polyploidization and indeterminate flowering in woody plants.
DNA Res
; 24(1): 71-80, 2017 Feb 01.
Article
en En
| MEDLINE
| ID: mdl-28011721
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.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Poliploidía
/
Genoma de Planta
/
Hibiscus
/
Flores
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
DNA Res
Asunto de la revista:
BIOLOGIA MOLECULAR
/
GENETICA
Año:
2017
Tipo del documento:
Article
Pais de publicación:
Reino Unido