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Arabidopsis and Brassicaceae

By vojta , 21 June 2023

Phylogenetic challenges in a recently diversified and polyploid-rich Alyssum (Brassicaceae) lineage: low divergence, reticulation, and parallel polyploid speciation

Elucidating the evolution of recently diverged and polyploid-rich plant lineages may be challenging even with high-throughput sequencing, both for biological reasons and bioinformatic difficulties. Here, we apply target enrichment with genome skimming (Hyb-Seq) to unravel the evolutionary history of the Alyssum montanum-A. repens species complex. Reconstruction of phylogenetic relationships in diploids supported recent and rapid diversification accompanied by reticulation events.

Články
Arabidopsis and Brassicaceae
Bioinformatics
Institute of Botany, Czech Academy of Sciences
Phylogeny
Phylogeography
HybSeq
Faculty of Science, Charles University
Taxonomy
Science, research, biology
By vojta , 12 October 2022

The importance of considering the evolutionary history of polyploids when assessing climatic niche evolution

Although whole-genome duplication (WGD) is an important speciation force, we still lack a consensus on the role of niche differentiation in polyploid evolution. In addition, the role of genome doubling per se vs. later divergence on polyploid niche evolution remains obscure. One reason for this might be that the intraspecific genetic structure of polyploid complexes and interploidy gene flow is often neglected in ecological studies. Here, we aim to investigate to which extent these evolutionary processes impact our inference on niche differentiation of autopolyploids.

Články
Arabidopsis and Brassicaceae
Bioinformatics
Institute of Botany, Czech Academy of Sciences
Phylogeography
Population genetics
Faculty of Science, Charles University
Science, research, biology
By vojta , 29 December 2020

Parallel Alpine Differentiation in Arabidopsis arenosa

Parallel evolution provides powerful natural experiments for studying repeatability of evolution and genomic basis of adaptation. Well-documented examples from plants are, however, still rare, as are inquiries of mechanisms driving convergence in some traits while divergence in others. Arabidopsis arenosa, a predominantly foothill species with scattered morphologically distinct alpine occurrences is a promising candidate. Yet, the hypothesis of parallelism remained untested.

Články
Arabidopsis and Brassicaceae
Bioinformatics
Institute of Botany, Czech Academy of Sciences
Phylogeny
Population genetics
Science, research, biology
Arabidopsis and Brassicaceae
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This work by Vojtěch Zeisek is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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