ArticleBMC plant biology2023
Genomic evidence reveals high genetic diversity in a narrowly distributed species and natural hybridization risk with a widespread species in the genus Geodorum.
Article in BMC plant biology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed.
- Comparative genetic diversity of the endangered, narrowly endemic Chinese orchidFrontiers in plant science · 2026Article
- Genomic insights into population structure and conservation of wild olive (Frontiers in plant science · 2026Article
- Isolation effects and soil properties drive genetic differentiation in Ormosia microphylla populations.Scientific reports · 2025Article
- Ecological Isolation Maintains the Species Boundaries Between Two SympatricEcology and evolution · 2025Article
- Article
- Genetic differentiation and historical dynamics of the endemic species Rheum pumilum on the Qinghai-Tibetan Plateau inferred from phylogeography implications.BMC plant biology · 2025Article
- Population connectivity and size reductions in the Anthropocene: the consequence of landscapes and historical bottlenecks in white forsythia fragmented habitats.BMC ecology and evolution · 2024Article
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Abstract
backgroundUnderstanding genetic diversity is a core issue in conservation genetics. However, previous genetic diversity evaluations of narrowly distributed species have rarely used closely related widespread species as a reference. Furthermore, identifying natural hybridization signals between narrowly and widely distributed sympatric species is of great importance for the development of species conservation programs.
methodsIn this study, population genotyping by sequencing (GBS) was performed for a narrowly distributed species, Geodorum eulophioides (endemic and endangered in Southwest China), and a widespread species, G. densiflorum. A total of 18,490 high-quality single nucleotide polymorphisms (SNPs) were identified at the whole-genome level.
resultsThe results showed that the nucleotide diversity and heterozygosity of G. eulophioides were significantly higher than those of G. densiflorum, confirming that narrowly distributed species can still preserve high genetic diversity. Consistent with taxonomic boundaries, all sampled individuals from the two species were divided into two genetic clusters and showed high genetic differentiation between species. However, in a sympatric population, a few G. eulophioides individuals were detected with genetic components from G. densiflorum, suggesting potential interspecific natural hybridization. This hypothesis was supported by Treemix analysis and hand-hybridization trials. Invasion of the habitat of G. eulophioides invasion by G. densiflorum under anthropogenic disturbance may be the main factor causing interspecific hybridization.
conclusionsTherefore, reducing or avoiding habitat disturbance is a key measure to protect the G. eulophioides populations. This study provides valuable information for future conservation programs for narrowly distributed species.
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