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

    Wang, L and Yu, S and Tong, C and Zhao, Y and Liu, Y and Song, C and Zhang, Y and Zhang, X and Wang, Y and Hua, W and Li, D and Li, F and Yu, J and Xu, C and Han, X and Huang, S and Tai, S and Wang, J and Xu, X and Li, Y and Liu, S and Varshney, R K and Wang, J and Zhang, X (2014) Genome sequencing of the high oil crop sesame provides insight into oil biosynthesis. Genome Biology, 15 (R39). pp. 1-13. ISSN 1465-6906

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    Abstract

    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.

    Item Type: Article
    Divisions: RP-Grain Legumes
    CRP: UNSPECIFIED
    Subjects: Others > Genetics and Genomics
    Depositing User: Mr Siva Shankar
    Date Deposited: 29 Mar 2014 05:56
    Last Modified: 29 Mar 2014 05:56
    URI: http://oar.icrisat.org/id/eprint/7724
    Official URL: http://dx.doi.org/10.1186/gb-2014-15-2-r39
    Projects: National Basic Research Program of China (973 Program; no. 2011CB109304 and no. 2011CB109305)
    Funders: National Natural Science Foundation of China, Central Public-interest Scientific Institution Basal, China Agriculture Research System
    Acknowledgement: UNSPECIFIED
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