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Nat Genet ; 49(11): 1633-1641, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28991254

RESUMO

Durian (Durio zibethinus) is a Southeast Asian tropical plant known for its hefty, spine-covered fruit and sulfury and onion-like odor. Here we present a draft genome assembly of D. zibethinus, representing the third plant genus in the Malvales order and first in the Helicteroideae subfamily to be sequenced. Single-molecule sequencing and chromosome contact maps enabled assembly of the highly heterozygous durian genome at chromosome-scale resolution. Transcriptomic analysis showed upregulation of sulfur-, ethylene-, and lipid-related pathways in durian fruits. We observed paleopolyploidization events shared by durian and cotton and durian-specific gene expansions in MGL (methionine γ-lyase), associated with production of volatile sulfur compounds (VSCs). MGL and the ethylene-related gene ACS (aminocyclopropane-1-carboxylic acid synthase) were upregulated in fruits concomitantly with their downstream metabolites (VSCs and ethylene), suggesting a potential association between ethylene biosynthesis and methionine regeneration via the Yang cycle. The durian genome provides a resource for tropical fruit biology and agronomy.


Assuntos
Bombacaceae/genética , Liases de Carbono-Enxofre/genética , Frutas/genética , Genoma de Planta , Proteínas de Plantas/genética , Transcriptoma , Aminoácidos Cíclicos/biossíntese , Bombacaceae/classificação , Bombacaceae/crescimento & desenvolvimento , Bombacaceae/metabolismo , Liases de Carbono-Enxofre/metabolismo , Mapeamento Cromossômico , Frutas/crescimento & desenvolvimento , Frutas/metabolismo , Sequenciamento de Nucleotídeos em Larga Escala , Ligases/genética , Ligases/metabolismo , Metabolismo dos Lipídeos/genética , Filogenia , Proteínas de Plantas/metabolismo , Enxofre/metabolismo , Compostos Orgânicos Voláteis/metabolismo
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