ArticleMolecular ecology2016
A high frequency of allopolyploid speciation in the gymnospermous genus Ephedra and its possible association with some biological and ecological features.
Article in Molecular ecology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed.
- Using Nuclear Genomic Data to Address Intractable Relationships and Gene Tree Discordance in an Ancient Group of Gymnosperms (Ecology and evolution · 2026Article
- Multi-omics profiling reveals single-seed mutants of Ephedra saxatilis as dominant variants in high-altitude Xizang.BMC plant biology · 2025Article
- Diploid and tetraploid cytotypes of the flagship Cape species Dicerothamnus rhinocerotis (Asteraceae): variation in distribution, ecological niche, morphology and genetics.Annals of botany · 2024Article
- Allopolyploidy: An Underestimated Driver inLife (Basel, Switzerland) · 2023Article
- The effect of high altitude on ephedrine content and metabolic variations in two species ofFrontiers in plant science · 2023Article
- Evolution of complex genome architecture in gymnosperms.GigaScience · 2022Article
- Unbiased Subgenome Evolution in Allotetraploid Species of Ephedra and Its Implications for the Evolution of Large Genomes in Gymnosperms.Genome biology and evolution · 2021Article
- Recurrent hybridization underlies the evolution of novelty inAoB PLANTS · 2021Article
- Population subdivision and hybridization in a species complex of Gentiana in the Qinghai-Tibetan Plateau.Annals of botany · 2020Article
- A Review on WorldwideEvidence-based complementary and alternative medicine : eCAM · 2020Review
- Cytogeography and chromosomal variation of the endemic East Asian herbEcology and evolution · 2019Article
- Article
- Molecular analysis of genetic diversity and population genetic structure inPhysiology and molecular biology of plants : an international journal of functional plant biology · 2019Article
- Polyploidy in the Conifer GenusFrontiers in plant science · 2019Article
- Review
- Article
- Divergence in Eco-Physiological Responses to Drought Mirrors the Distinct Distribution of Chamerion angustifolium Cytotypes in the Himalaya-Hengduan Mountains Region.Frontiers in plant science · 2016Article
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6 authors.
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Abstract
The origin and evolution of polyploids have been studied extensively in angiosperms and ferns but very rarely in gymnosperms. With the exception of three species of conifers, all natural polyploid species of gymnosperms belong to Ephedra, in which more than half of the species show polyploid cytotypes. Here, we investigated the origin and evolution of polyploids of Ephedra distributed in the Qinghai-Tibetan Plateau (QTP) and neighbouring areas. Flow cytometry (FCM) was used to measure the ploidy levels of the sampled species that are represented by multiple individuals from different populations, and then, two single-copy nuclear genes (LFY and DDB2) and two chloroplast DNA fragments were used to unravel the possible origins and maternal donors of the polyploids. The results indicate that the studied polyploid species are allopolyploids, and suggest that allotetraploidy is a dominant mode of speciation in Ephedra. The high percentage of polyploids in the genus could be related to some of its biological attributes such as vegetative propagation, a relatively high rate of unreduced gamete formation, and a small genome size relative to most other gymnosperms. Significant ecological divergences between allotetraploids and their putative progenitors were detected by PCAs and anova and Tukey's tests, with the exception of E. saxatilis. The overlap of geographical distributions and ecological niches of some diploid species could have provided opportunities for interspecific hybridization and allopolyploid speciation.
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