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Whole genome resequencing of Botrytis cinerea isolates identifies high levels of standing diversity
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Atwell, Susanna, Corwin, Jason A., Soltis, Nicole E., Subedy, Anushryia, Denby, Katherine J. and Kliebenstein, Daniel James (2015) Whole genome resequencing of Botrytis cinerea isolates identifies high levels of standing diversity. Frontiers in Microbiology, 6 . pp. 1-14. 996. doi:10.3389/fmicb.2015.00996
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Official URL: http://dx.doi.org/10.3389/fmicb.2015.00996
Abstract
How standing genetic variation within a pathogen contributes to diversity in host/pathogen interactions is poorly understood, partly because most studied pathogens are host-specific, clonally reproducing organisms which complicates genetic analysis. In contrast, Botrytis cinerea is a sexually reproducing, true haploid ascomycete that can infect a wide range of diverse plant hosts. While previous work had shown significant genomic variation between two isolates, we proceeded to assess the level and frequency of standing variation in a population of B. cinerea. To begin measuring standing genetic variation in B. cinerea, we re-sequenced the genomes of 13 different isolates and aligned them to the previously sequenced T4 reference genome. In addition one of these isolates was resequenced from four independently repeated cultures. A high level of genetic diversity was found within the 13 isolates. Within this variation, we could identify clusters of genes with major effect polymorphisms, i.e., polymorphisms that lead to a predicted functional knockout, that surrounded genes involved in controlling vegetative incompatibility. The genotype at these loci was able to partially predict the interaction of these isolates in vegetative fusion assays showing that these loci control vegetative incompatibility. This suggests that the vegetative incompatibility loci within B. cinerea are associated with regions of increased genetic diversity. The genome re-sequencing of four clones from the one isolate (Grape) that had been independently propagated over 10 years showed no detectable spontaneous mutation. This suggests that B. cinerea does not display an elevated spontaneous mutation rate. Future work will allow us to test if, and how, this diversity may be contributing to the pathogen's broad host range.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QK Botany | ||||||||
| Divisions: | Faculty of Science > Life Sciences (2010- ) | ||||||||
| Library of Congress Subject Headings (LCSH): | Botrytis cinerea, Plant-pathogen relationships -- Genetic aspects | ||||||||
| Journal or Publication Title: | Frontiers in Microbiology | ||||||||
| Publisher: | Frontiers Research Foundation | ||||||||
| ISSN: | 1664-302X | ||||||||
| Official Date: | 24 September 2015 | ||||||||
| Dates: |
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| Volume: | 6 | ||||||||
| Number of Pages: | 14 | ||||||||
| Page Range: | pp. 1-14 | ||||||||
| Article Number: | 996 | ||||||||
| DOI: | 10.3389/fmicb.2015.00996 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access | ||||||||
| Funder: | National Science Foundation (U.S.) (NSF), United States. Department of Agriculture (USDA), Danmarks Grundforskningsfond [Danish National Research Foundation] | ||||||||
| Grant number: | 1021861 (NSF), 1339125 (NSF), CA-D-PLS-7033- H (USDA) |
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