Phylogenetic Analysis of Carex and Cyperaceae Diversity

The genus Carex, comprising over 2,000 species, sits at the heart of Cyperaceae phylogenetic research owing to its extraordinary morphological diversity, global distribution and holocentric chromosomes. Phylogenetic analyses have combined DNA sequence data, comparative genomics and cytogenetic studies to reconstruct evolutionary relationships, trace karyotype changes and delimit species boundaries. Insights into genome synteny reveal that long blocks of conserved gene order persist despite frequent chromosome fission and fusion, underscoring the role of repetitive DNA in driving both chromosomal rearrangements and species cohesion. Integrative approaches, drawing on plastid, nuclear and ribosomal markers, have elucidated clade structure across tribe- and genus-level divergences, providing a robust framework for taxonomic revision. Advances in high-throughput target capture and whole-genome sequencing have accelerated resolution of deep and shallow branches alike, enabling the identification of cryptic lineages and patterns of hybridisation. These developments not only refine classification but also inform conservation of wetland ecosystems and the management of sedge-dominated habitats under climate change.

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Phylogenetic Analysis of Carex and Cyperaceae Diversity publication trend

The graph below shows the total number of articles in phylogenetic analysis of carex and cyperaceae diversity across all publications each year (not limited to Nature Index journals).

Technical terms

Phylogenetic analysis: Reconstruction of evolutionary relationships among species or genes using genetic or morphological data.

Holocentric chromosome: A chromosome type with kinetochore activity distributed along its entire length rather than at a single primary centromere.

Synteny: Conservation of blocks of gene order on chromosomes of different species.

Dysploidy: Change in chromosome number by the gain or loss of individual chromosomes without whole-genome duplication.

Polyploidy: Condition of having more than two complete sets of chromosomes, often resulting from whole-genome duplication.

Clade: A group of organisms that includes an ancestor and all its descendants, forming a single branch on a phylogenetic tree.

Phylogenomics: Inference of evolutionary relationships based on genome-scale data rather than single or few genes.

References

1. Genomic hotspots of chromosome rearrangements explain conserved synteny despite high rates of chromosome evolution in a holocentric lineage. Molecular Ecology (2023).
2. A linear classification of Cyperaceae. Kew Bulletin (2022).
3. A new classification of Cyperaceae (Poales) supported by phylogenomic data. Journal of Systematics and Evolution (2021).