The Role of Polyploidy in the Genetic Structure and Expansion of Lepisorus clathratus in the Qinghai-Tibetan Plateau and Hengduan Mountains
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View abstract on PubMed
Summary
This summary is machine-generated.Polyploidy in the fern Lepisorus clathratus drives genetic diversity and geographic distribution. Polyploid ferns show greater adaptability and wider ranges, influencing plant evolution in mountainous regions.
Area Of Science
- Plant evolutionary biology
- Genetics and genomics
- Ecology and conservation
Background
- Polyploidy is a significant driver of plant evolution, impacting genetic diversity and species distribution.
- Lepisorus clathratus, a fern species, is endemic to the Qinghai-Tibetan Plateau and Hengduan Mountains and exhibits polyploidy.
Purpose Of The Study
- To investigate the genetic diversity and distribution of the polyploid fern Lepisorus clathratus.
- To understand the role of different ploidy levels (diploid, tetraploid, hexaploid) in the species' evolution and adaptation.
Main Methods
- Sampling of 586 individuals from 66 populations.
- Flow cytometry and chloroplast DNA sequencing for ploidy variation and genetic structure analysis.
- Molecular variance analysis and historical gene flow analysis.
- Ecological niche modeling to assess post-glacial expansion.
Main Results
- Three ploidy levels (diploid, tetraploid, hexaploid) were identified in Lepisorus clathratus.
- Tetraploid populations were widespread in the Hengduan Mountains, while diploids were restricted to the Qinghai-Tibetan Plateau.
- Polyploid populations showed higher migration rates and greater post-glacial expansion success, linked to ecological flexibility.
Conclusions
- Polyploidy plays a critical role in shaping the genetic structure and geographic expansion of Lepisorus clathratus.
- The findings contribute to understanding plant adaptation mechanisms in response to historical climate change.
- Polyploidy enhances species' capacity for colonization and adaptation in dynamic environments.
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