Pan-European study of genotypes and phenotypes in the Arabidopsis relative Cardamine hirsuta reveals how adaptation, demography, and development shape diversity patterns
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View abstract on PubMed
Summary
This summary is machine-generated.Cardamine hirsuta exhibits significant genetic diversity, with a unique ChFRIGIDA allele enabling adaptation and range expansion. A quantitative trait locus in SPL9 influences Azorean morphotypes, highlighting adaptation to climate gradients.
Area Of Science
- Evolutionary biology
- Plant genetics
- Population genetics
Background
- Cardamine hirsuta, an Arabidopsis relative, displays natural DNA polymorphisms and associated phenotypes.
- Arabidopsis thaliana serves as a comparative model for understanding plant evolution and adaptation.
Purpose Of The Study
- To investigate natural DNA polymorphisms and phenotypes in Cardamine hirsuta.
- To compare patterns of genetic differentiation and adaptation between C. hirsuta and Arabidopsis.
- To explore the role of developmental pathways and climate in shaping plant diversity.
Main Methods
- Analysis of natural DNA polymorphisms and associated phenotypes.
- Comparative population genetics of C. hirsuta and Arabidopsis.
- Identification and characterization of quantitative trait loci (QTLs).
- Phylogeographic analysis and evidence for selection.
Main Results
- Strong genetic differentiation observed in European C. hirsuta, with broader distribution of Iberian strains compared to Arabidopsis.
- Synchronization of vegetative and reproductive development, with heterochronic pathways significantly shaping C. hirsuta variation.
- A single, adaptively evolved ChFRIGIDA allele facilitated range expansion in C. hirsuta, contrasting with multiple FRIGIDA haplotypes in Arabidopsis.
- The Azores islands are a hotspot for C. hirsuta diversity, with a QTL in the SPL9 transcription factor identified as a determinant of an Azorean morphotype.
- Evidence for positive selection on the SPL9 QTL, with its distribution correlating with a climate gradient.
Conclusions
- The interplay of adaptation, demography, and development has shaped the diversity patterns of C. hirsuta and Arabidopsis.
- Heterochronic pathways and specific adaptive alleles (e.g., ChFRIGIDA, SPL9) are key drivers of diversification and adaptation in plants.
- Comparative studies of related species provide a framework for understanding evolutionary processes shaping biodiversity.
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