Journal
AMERICAN JOURNAL OF BOTANY
Volume 99, Issue 2, Pages 372-382Publisher
WILEY
DOI: 10.3732/ajb.1100395
Keywords
Asteraceae; evolutionary model systems; genomics; next-generation sequencing; Nicotiana; polyploidy; Solanaceae; Tragopogon
Categories
Funding
- NSF [MCB-0346437, DEB-0919254, DEB-0919348, DEB-0922003]
- University of Florida
- NERC [NE/G01504X/1]
- CNPq/Brazil [200733/2009-5]
- NERC [NE/G01504X/1] Funding Source: UKRI
- Direct For Biological Sciences
- Division Of Environmental Biology [0919254] Funding Source: National Science Foundation
- Division Of Environmental Biology
- Direct For Biological Sciences [0922003] Funding Source: National Science Foundation
- Natural Environment Research Council [NE/C511964/1, NE/G01504X/1] Funding Source: researchfish
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Premise of the study: Hybridization and polyploidization (allopolyploidy) are ubiquitous in the evolution of plants, but tracing the origins and subsequent evolution of the constituent genomes of allopolyploids has been challenging. Genome doubling greatly complicates genetic analyses, and this has long hindered investigation in that most allopolyploid species are nonmodel organisms. However, recent advances in sequencing and genomics technologies now provide unprecedented opportunities to analyze numerous genetic markers in multiple individuals in any organism. Methods: Here we review the application of next-generation sequencing technologies to the study of three aspects of allopolyploid genome evolution: duplicated gene loss and expression in two recently formed Tragopogon allopolyploids, intergenomic interactions and chromosomal evolution in Tragopogon miscellus, and repetitive DNA evolution in Nicotiana allopolyploids. Key results: For the first time, we can explore on a genomic scale the evolutionary processes that are ongoing in natural allopolyploids and not be restricted to well-studied crops and genetic models. Conclusions: These approaches can be easily and inexpensively applied to many other plant species making any evolutionarily provocative system a new model system.
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