ArticleBMC evolutionary biology2014
Multiple hybridization events, polyploidy and low postmating isolation entangle the evolution of neotropical species of Epidendrum (Orchidaceae).
Article in BMC evolutionary biology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed, 69 citations in OpenAlex.
- The presence and strength of post-pollination barriers in an orchid lineage that lacks pollinator specialization.Annals of botany · 2026Article
- Phylogeny and Biogeography ofEcology and evolution · 2026Article
- The Repeatome in the Mega-GenusGenes · 2026Article
- Hybridization and embryological patterns underpinning reproductive barriers in Dactylorhiza (Orchidaceae).Scientific reports · 2025Article
- Synthesis and Scope of the Role of Postmating Prezygotic Isolation in Speciation.Cold Spring Harbor perspectives in biology · 2024Review
- The Complex Genetic Legacy of Hybridization and Introgression between the RarePlants (Basel, Switzerland) · 2024Article
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- Pollination in the Rainforest: Scarce Visitors and Low Effective Pollinators Limit the Fruiting Success of Tropical Orchids.Insects · 2021Article
- Article
- Complex fine-scale spatial genetic structure in Epidendrum rhopalostele: an epiphytic orchid.Heredity · 2019Article
- The complete chloroplast genome ofPeerJ · 2019Article
- Natural hybridization and genetic and morphological variation between two epiphytic bromeliads.AoB PLANTS · 2018Article
- Variation in chromosome number and breeding systems: implications for diversification inComparative cytogenetics · 2018Article
- Characterization of sympatricPeerJ · 2018Article
- Article
- The striking and unexpected cytogenetic diversity of genus Tanacetum L. (Asteraceae): a cytometric and fluorescent in situ hybridisation study of Iranian taxa.BMC plant biology · 2015Article
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Authors and funding
4 authors at 2 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundHybridization and polyploidy are central processes in evolution and speciation. These mechanisms often lead to complex patterns of genetic variation and the creation of novel genotypes, which may establish if they become isolated from gene flow. However, in the absence of reproductive isolation, species boundaries might easily be disrupted. Here, we used a combination of AFLPs, chloroplast DNA markers and flow cytometry to investigate the evolutionary outcomes of hybridization between two endemic Ecuadorian species of Epidendrum (E. madsenii and E. rhopalostele) in three hybrid zones. Postmating isolation was also quantified to determine the role of this barrier in restraining gene flow between hybrids and the parental species. In addition, future ecological niche models were constructed to predict the outcomes of hybridization between these species.
resultsOur results confirmed the presence of hybrids in all hybrid zones, but revealed that a third parental species (E. falcisepalum) has contributed to one of the hybrid zones studied. Backcross genotypes were frequent in all hybrid zones, which was in accordance with the absence of strong reproductive barriers. The process of hybridization was highly asymmetric and followed in some cases by polyploidy. The projection of future niche models predicted a severe reduction in the area suitable for the occurrence of these species, although favorable conditions will still occur for the existence of the current hybrid zones.
conclusionsThe recurrent process of hybridization has compromised the genetic integrity of the parental species. Most individuals of the parental species can no longer be considered as pure-bred individuals because most were classified as backcrossed hybrids. Novel genetic lineages occur in all hybrid zones implying that hybrids are fertile and can compete with the parental species. These results, together with the prediction of suitable conditions for the future occurrence of these hybrid zones, highlight the importance of conserving these geographic areas as sources of novel taxonomic entities.
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