Genome sequencing of the high oil crop sesame provides insight into oil biosynthesis

Wang, Linhai, Yu, Sheng, Tong, Chaobo, Zhao, Yingzhong, Liu, Yan, Song, Chi, Zhang, Yanxin, Zhang, Xudong, Wang, Ying, Hua, Wei, Li, Donghua, Li, Dan, Li, Fang, Yu, Jingyin, Xu, Chunyan, Han, Xuelian, Huang, Shunmou, Tai, Shuaishuai, Wang, Junyi, Xu, Xun, Li, Yingrui, Liu, Shengyi, Varshney, Rajeev K., Wang, Jun and Zhang, Xiurong (2014) Genome sequencing of the high oil crop sesame provides insight into oil biosynthesis. Genome Biology, 15 2: . doi:10.1186/gb-2014-15-2-r39


Author Wang, Linhai
Yu, Sheng
Tong, Chaobo
Zhao, Yingzhong
Liu, Yan
Song, Chi
Zhang, Yanxin
Zhang, Xudong
Wang, Ying
Hua, Wei
Li, Donghua
Li, Dan
Li, Fang
Yu, Jingyin
Xu, Chunyan
Han, Xuelian
Huang, Shunmou
Tai, Shuaishuai
Wang, Junyi
Xu, Xun
Li, Yingrui
Liu, Shengyi
Varshney, Rajeev K.
Wang, Jun
Zhang, Xiurong
Title Genome sequencing of the high oil crop sesame provides insight into oil biosynthesis
Journal name Genome Biology   Check publisher's open access policy
ISSN 1474-760X
Publication date 2014-02-27
Year available 2014
Sub-type Article (original research)
DOI 10.1186/gb-2014-15-2-r39
Open Access Status DOI
Volume 15
Issue 2
Total pages 13
Place of publication London, United Kingdom
Publisher BioMed Central
Language eng
Formatted abstract
Background
Sesame, Sesamum indicum L., is considered the queen of oilseeds for its high oil content and quality, and is grown widely in tropical and subtropical areas as an important source of oil and protein. However, the molecular biology of sesame is largely unexplored.

Results
Here, we report a high-quality genome sequence of sesame assembled de novo with a contig N50 of 52.2 kb and a scaffold N50 of 2.1 Mb, containing an estimated 27,148 genes. The results reveal novel, independent whole genome duplication and the absence of the Toll/interleukin-1 receptor domain in resistance genes. Candidate genes and oil biosynthetic pathways contributing to high oil content were discovered by comparative genomic and transcriptomic analyses. These revealed the expansion of type 1 lipid transfer genes by tandem duplication, the contraction of lipid degradation genes, and the differential expression of essential genes in the triacylglycerol biosynthesis pathway, particularly in the early stage of seed development. Resequencing data in 29 sesame accessions from 12 countries suggested that the high genetic diversity of lipid-related genes might be associated with the wide variation in oil content. Additionally, the results shed light on the pivotal stage of seed development, oil accumulation and potential key genes for sesamin production, an important pharmacological constituent of sesame.

Conclusions
As an important species from the order Lamiales and a high oil crop, the sesame genome will facilitate future research on the evolution of eudicots, as well as the study of lipid biosynthesis and potential genetic improvement of sesame.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Institute for Molecular Bioscience - Publications
 
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