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Authors: Teh, Bin Tean and Lim, Kevin and Yong, Chern Han and Ng, Cedric Chuan Young and Rao, Sushma Ramesh and Rajasegaran, Vikneswari and Lim, Weng Khong and Ong, Choon Kiat and Chan, Ki and Cheng, Vincent Kin Yuen and Soh, Poh Sheng and Swarup, Sanjay and Rozen, Steven G and Nagarajan, Niranjan and Tan, Patrick

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 ?-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.

Journal: Nature genetics
DOI: 10.1038/ng.3972
Year: 2017

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