Hybrid Origins of Plant Species

@article{Rieseberg1997HybridOO,
  title={Hybrid Origins of Plant Species},
  author={Loren H. Rieseberg},
  journal={Annual Review of Ecology, Evolution, and Systematics},
  year={1997},
  volume={28},
  pages={359-389}
}
  • L. Rieseberg
  • Published 1 November 1997
  • Biology
  • Annual Review of Ecology, Evolution, and Systematics
The origin of new homoploid species via hybridization is theoretically difficult because it requires the development of reproductive isolation in sympatry. Nonetheless, this mode is often and carelessly used by botanists to account for the formation of species that are morphologically intermediate with respect to related congeners. Here, I review experimental, theoretical, and empirical studies of homoploid hybrid speciation to evaluate the feasibility, tempo, and frequency of this mode… 

Figures from this paper

The likelihood of homoploid hybrid speciation
TLDR
The model is of recombinational speciation, in which chromosomal rearrangements between parental species result in poor fertility of F1 hybrids, but through recombination, novel homozygous types are formed that have restored fertility.
Rapid hybrid speciation in wild sunflowers.
TLDR
Estimating the sizes of parental species chromosomal blocks in Helianthus anomalus, a wild sunflower species derived via hybridization between H. annuus and H. petiolaris, provides a new and general method for estimating the tempo of hybrid speciation and dating the origin of hybrid zones.
HYBRID SPECIATION IN WILD SUNFLOWERS1
TLDR
Ongoing work includes searches for the molecular signature of selection during hybrid Speciation, surveys of gene expression shifts associated with hybrid speciation, and experiments that evaluate the role of new hybrid gene combinations versus reproductive isolation in the ecological divergence of hybrid lineages.
Hybrid speciation in angiosperms: parental divergence drives ploidy.
TLDR
The classical cytological hypothesis that ploidy in hybrid speciation is governed by the extent of chromosomal rearrangements among parental species is evaluated and it is argued that this asymmetric relationship may be reinforced immediately after hybrid formation, during stabilization and establishment.
Recent hybrid speciation at the origin of the narrow endemic.
TLDR
Hybrid speciation appears as a major process having promoted the postglacial origin of the narrow endemic P. helvetica, suggesting hybrid speciation as an effective process that rapidly produces new species under climate changes.
Origin(s) of the diploid hybrid species Helianthus deserticola (Asteraceae).
TLDR
The possibility that the diploid hybrid species Helianthus deserticola arose from more than one hybrid speciation event was investigated using patterns of variation from cpDNA, 18 nuclear microsatellite loci, and population interfertility, suggesting either a single origin followed by introgression with the parental species or multiple origins.
Genetic integrity of sympatric hybridising plant species: the case of Orchis italica and O. anthropophora.
TLDR
The absence of any backcross generations and plastid introgression suggest that O. xbivonae does not represent a bridge to gene flow between O. italica and O. anthropophora, and the low hybrid fitness testifies to the effectiveness of late post-zygotic barriers occurring between the parental species.
Hybridization and polyploidy as drivers of continuing evolution and speciation in Sorbus
TLDR
The genetic identity of putative novel taxa is confirmed and it is shown that hybridization involving sexual diploid species, primarily S. aria and S. torminalis and polyploid facultative apomictic species from subgenus Aria, has been responsible for generating this biodiversity.
GENETIC DIVERGENCE AND HYBRID SPECIATION
TLDR
This work estimated genetic divergence between species pairs that have given rise to homoploid and polyploid hybrid species and found that divergence is significantly greater for the parents of polyploids, even after controlling for potentially confounding factors.
The ecological genetics of homoploid hybrid speciation.
TLDR
Overall, theory and empirical evidence gathered to date suggest that ecological selection is a major factor promoting homoploid hybrid speciation, with the strongest evidence coming from genetic studies.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 157 REFERENCES
Hybrid speciation accompanied by genomic reorganization in wild sunflowers
TLDR
Comparative linkage mapping is used to demonstrate extensive genomic reorganization in the hybrid species Helianthm anomalus, relative to its parents H. annuus and H. petiolaris, and satisfy genetic models for speciation through hybrid recombination.
POLLINATION SYSTEMS AS ISOLATING MECHANISMS IN ANGIOSPERMS
  • V. Grant
  • Biology
    Evolution; international journal of organic evolution
  • 1949
TLDR
The purpose of the present paper is to investigate the occurrence and distribution in angiosperms of isolating mechanisms operating at the critical stage of pollination.
The origin of a new species of gilia in a hybridization experiment.
TLDR
It will be shown that this hybrid derivative of the sterile hybrid Gilia malior x G. modocensis has recovered full fertility without change in ploidy, has attained a new combination of morphological characters, and is isolated by a strong sterility barrier from the parental species and from the other hybrid derivatives.
A MOLECULAR REEXAMINATION OF DIPLOID HYBRID SPECIATION OF SOLANUM RAPHANIFOLIUM
TLDR
Interspecific hybridization has long been the focus of intensive study in many groups of plants and recent work with genetically more precise isozyme and DNA characters have provided new insights into hybridization hypotheses.
The role of hybridization and introgression in the diversification of animals
TLDR
The significance of introgressive hybridization in evolution and diversification of animals is reconsidered to determine if the generally negative assessment of these processes is warranted.
HYBRIDIZATION, HOMOGAMY, AND SYMPATRIC SPECIATION
TLDR
This paper develops the hypothesis that sympatric speciation may be less unlikely than previously considered on the basis of a realistic model suggested by recent studies of hybridization and floral isolation in a group of Penstemon species.
Role of Gene Interactions in Hybrid Speciation: Evidence from Ancient and Experimental Hybrids
TLDR
The genomic composition of three experimentally synthesized hybrid lineages indicated that selection to a large extent governs hybrid species formation, and interactions between coadapted parental species' genes constrain the genomic compositions of hybrid species.
Distribution of spontaneous plant hybrids.
TLDR
Spontaneous hybridization is found to be nonrandomly distributed among taxa, concentrated in certain families and certain genera, often at a frequency out of proportion to the size of the family or genus.
Hybridization and the Extinction of Rare Plant Species
TLDR
It is suggested that hybridization is an increasing threat to rare species because ecological barriers are being disrupted by human activities and the negative consequences of hybridization are unlikely to be compensated for by immigration from conspecific populations.
HYBRIDIZATION AS A DISPERSAL MECHANISM
  • B. Potts, J. B. Reid
  • Environmental Science, Biology
    Evolution; international journal of organic evolution
  • 1988
TLDR
The results suggest that E. risdonii may invade suitable habitat islands within the E. amygdalina forest, independently of seed migration, by long‐distance pollen migration followed by selection for the gene combinations of the pollen parent.
...
1
2
3
4
5
...