Genomic Clues to the Evolutionary Success of Polyploid Plants

@article{Hegarty2008GenomicCT,
  title={Genomic Clues to the Evolutionary Success of Polyploid Plants},
  author={Matthew J Hegarty and Simon J Hiscock},
  journal={Current Biology},
  year={2008},
  volume={18},
  pages={R435-R444}
}

Figures and Tables from this paper

Polyploidy and interspecific hybridization: partners for adaptation, speciation and evolution in plants
TLDR
Polyploidy results in immediate genetic redundancy and represents, with the emergence of new gene functions, an important source of novelty in plant evolution, and is illustrated by the huge angiosperm diversity that is assumed to originate from recurrent polyploidization events.
Structural and Functional Evolution of Resynthesized Polyploids
TLDR
These studies demonstrate that polyploidization may have immediate genetic and phenotypic consequences, particularly in B. napus and resynthesized Brassica allopolyploids.
Rapid genomic changes in polyploid wheat and related species: implications for genome evolution and genetic improvement.
The role of hybridization in plant speciation.
TLDR
The time is therefore right for a review of the role of hybridization in plant speciation, demonstrating that perhaps all angiosperms have likely undergone at least one round of polyploidization and that hybridization has been an important force in generating angiosperm species diversity.
Significance and Biological Consequences of Polyploidization in Land Plant Evolution
TLDR
How genomic traces of ancient WGDs can be identified and dated are discussed, the molecular biological consequences of polyploidization on shorter and longer evolutionary timescales are described, and how WGGs might have contributed to the evolutionary success of descendant plant lineages are discussed.
Natural Pathways to Polyploidy in Plants and Consequences for Genome Reorganization
The last decade highlighted polyploidy as a rampant evolutionary process that triggers drastic genome reorganization, but much remains to be understood about their causes and consequences in both
Genomic aspects of research involving polyploid plants
TLDR
Recent progress in genomics research involving ancient, young, and synthetic polyploid plants is summarized, with a focus on genome size evolution, genomic diversity, genomic rearrangement, genetic and epigenetic changes in duplicated genes, gene discovery, and comparative genomics.
Natural Pathways to Polyploidy and Consequences for Genome Organization and Genome Size
The last decade highlighted polyploidy as a rampant evolutionary process that triggers drastic genome reorganization, but much remains to be understood about their causes and consequences in both
Allopolyploidization Lays the Foundation for Evolution of Distinct Populations: Evidence From Analysis of Synthetic Arabidopsis Allohexaploids
TLDR
Testing the hypothesis that mosaic aneuploidy contributes to the formation of incipient diversity in neoallopolyploids found evidence of sibling line-specific chromosome number variations and rapidly diverging phenotypes between lines, including flowering time, leaf shape, and pollen viability.
Does one subgenome become dominant in the formation and evolution of a polyploid?
TLDR
Subgenome biases in polyploids mainly reflect legacy from the progenitors and that they can be detected before the completion of polyploidization events, and there is no convincing evidence that the magnitudes of sub genome biases have significantly changed during evolution for any of the allopolyploid species assessed.
...
...

References

SHOWING 1-10 OF 117 REFERENCES
Polyploidy in Plants
Genome evolution in polyploids
TLDR
Processes and mechanisms of gene and genome evolution in polyploids are reviewed, including the role of transposable elements in structural and regulatory gene evolution; processes and significance of epigenetic silencing; underlying controls of chromosome pairing and mechanisms and functional significance of rapid genome changes are reviewed.
The role of genetic and genomic attributes in the success of polyploids.
  • P. Soltis, D. Soltis
  • Biology
    Proceedings of the National Academy of Sciences of the United States of America
  • 2000
TLDR
Some of the genetic and genomic attributes of polyploids may have both biochemical and ecological benefits that contribute to the success ofpolyploid plants in nature.
Polyploid incidence and evolution.
TLDR
New estimates for the incidence of polyploidy in ferns and flowering plants are presented based on a simple model describing transitions between odd and even base chromosome numbers, and it is indicated that ploidy changes may represent from 2 to 4% of speciation events in flowering plants and 7% in f Ferns.
Formation of stable epialleles and their paramutation-like interaction in tetraploid Arabidopsis thaliana
TLDR
It is shown that epialleles in tetraploid plants (but not in diploids) interact in trans and lead to heritable gene silencing persisting after segregation from the inactivating allele, which leads to the establishment of functional epigenetic homozygosity and to conversion of new recessive alleles into traits expressed in early polyploid generations.
Polyploidy in angiosperms
Molecular data and the dynamic nature of polyploidy
TLDR
Molecular data strongly suggest that recurrent formation of polyploid species is the rule, rather than the exception, and that multiple origins were found to be frequent on a local geographic scale, as well as during a short span of time.
PATHWAYS, MECHANISMS, AND RATES OF POLYPLOID FORMATION IN FLOWERING PLANTS
TLDR
The results indicate that the triploid bridge pathway can contribute significantly to autopolyploids formation regardless of the mating system, and to allopolyploid formation in outcrossing taxa.
Plant polyploidy and non-uniform effects on insect herbivores
  • S. Nuismer, J. Thompson
  • Biology, Environmental Science
    Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 2001
TLDR
Evidence is provided from a 4 year study demonstrating that the evolution of polyploidy has reshaped the interactions between a widespread plant and three species of phytophagous moths, suggesting that a primary consequence of plant polyploids may be to shape the ecological structure of plant–insect interactions, thereby providing opportunities for diversification in both plant and insect taxa.
In polyploids, one plus one does not equal two
...
...