Nicotiana benthamiana draft genome sequence v1.0.1
A new draft sequence of the Nicotiana benthamiana genome has been released by researchers from the Boyce Thompson Institute for Plant Research (BTI). It is accessible through the SGN BLAST tool and JBrowse, and can be downloaded from the SGN ftp site. More information about this project can be found at the BTI Nicotiana benthamiana Project site
N. benthamiana has a very complex genome consisting of n=19 chromosomes that is estimated at over 3.5GB in size. Taxonomically, it is an old allotetraploid of the section Suaveolentes that was formed from diploid parents from the section Sylvestres and the section Noctiflorae. It is native to Australia [2, 3].
N. benthamiana is a widely used model for plant-microbe biology and other research applications. It is particularly useful because it is related to tomato and potato and is amenable to virus-induced gene silencing (VIGS) which facilitates the efficient functional study of plant genes.
The draft sequence of N. benthamiana will allow better design of constructs for virus-induced gene-silencing (VIGS) in order to reduce the possibility of 'off-target' gene silencing [1]. The sequence will be also useful to identify tomato and potato orthologs for comparative genomics with other Solanaceae species and, to retrieve promoter sequences.
Data Agreement
Accessing to the Nicotiana benthamiana genome data, you agree not to publish any article containing any analysis of the whole gene space or whole genome scale prior to the publication by the Benthamiana Sequencing and Annotation Consortium (BSAC). These analysis include the identification of complete (whole genome) sets of genomic features such as genes, gene families, regulatory elements, repeat structures, GC content, or any other genome feature, and whole-genome- or chromosome- scale comparisons with other species. Scientific users are free to publish analysis based in a single gene (or group of genes).
If you have any questions, please contact Professor Gregory Martin or Professor Aureliano Bombarely.
Assembly Statistics
N. benthamiana Genome v1.0.1. Statistics from file Niben.genome.v1.0.1.scaffolds.nrcontigs.fasta| Sequences | 56,094 | |
|---|---|---|
| Total Length (bp) | 2,969,810,994 | |
| Average length (bp) | 52,943 | |
| Longest sequence (bp) | 2,838,176 | ID = Niben101Scf02793 |
| Shortest sequence (bp) | 500 | ID = Niben101Ctg00001 |
| N95 length (bp) | 77,805 | |
| N90 length (bp) | 140,694 | |
| N75 length (bp) | 282,465 | |
| N50 length (bp) | 520,105 | |
| N25 length (bp) | 859,098 | |
| N95 index | 7,206 | |
| N90 index | 5,835 | |
| N75 index | 3,671 | |
| N50 index | 1,738 | |
| N25 index | 612 |
Sequencing approach
Seedlings were grown in the greenhouse and nuclear DNA was extracted from etiolated leaves. From the DNA, three distinct libraries were synthesized for use in a Illumina HiSeq-2000 sequencer: 1) a paired end library with an insert size of approximately 500 bp insert size; 2) a mate-pair type library with an insert size of 2kb; and 3) a mate pair with an insert size of 5kb. Sequencing was performed using a full run with 4 lanes of the paired end library and 1 lane each of the mate pair libraries.
Accession sequenced
The accession sequenced is referred to as "Nb-1". Seeds can be obtained by contacting Professor Gregory Martin.
Links
- More information about this project at the BTI Nicotiana benthamiana Project site
- Austrialia/New Zealand Nicotiana benthamiana sequencing project
- On-line tutorial for VIGS procedure
References
- Bombarely, A., H. G. Rosli, J. Vrebalov, P. Moffett, L. A. Mueller, and G. B. Martin (2012). A draft genome sequence of Nicotiana benthamiana to enhance molecular plant-microbe biology research. Molecular Plant-Microbe Interactions 25:1523-1530.
- Knapp, S. M. W. Chase and J. J. Clarkson (2004). Nomenclatural changes and a new sectional classification in Nicotiana (Solanaceae). Taxon 53:73-82.
- Goodin, M. M., D. Zaitlin, R. A. Naidu, and S. A. Lommel (2008). Nicotiana benthamiana: Its history and future as a model for plant-pathogen interactions. Molecular Plant-Microbe Interactions 21:1026.
Acknowledgments
Sequencing of the N. benthamiana genome was supported by funds from the Boyce Thompson Institute for Plant Research and National Science Foundation grants IOS-1025642 (A. Collmer and G. Martin), and IOS-0343327 (P. Moffett).
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