Molecular Phylogenetics of Gesneriaceae Plants

Molecular phylogenetics has transformed our understanding of the evolutionary history of Gesneriaceae, a family renowned for its floral diversity and ecological breadth. By harnessing high‐throughput sequencing of chloroplast and nuclear genomes, researchers have elucidated the relationships among major lineages, resolved taxonomic ambiguities and traced biogeographical dispersal across Asia, Africa and the Neotropics. Plastid phylogenomics, based on whole plastome assemblies and targeted DNA markers, has clarified the monophyly of tribes and subtribes, revealed instances of parallel morphological evolution and highlighted centres of speciation, particularly in karst ecosystems. Integrating morphological character appraisal with molecular trees has uncovered adaptive shifts in floral form linked to pollinator interactions, while comparative analyses of genome structure and simple sequence repeats (SSRs) have provided tools for species identification, conservation genetics and population studies. These advances underpin a more stable classification, inform strategies for preserving endangered endemics and offer a robust framework for exploring ecological adaptation and speciation dynamics within Gesneriaceae.

Research from Nature Portfolio

Recent studies have provided a comprehensive plastome‐based phylogenomic backbone for Primulina and Petrocodon, two limestone‐karst genera. Nine newly assembled plastomes, together with over forty publicly available genomes, exhibit a highly conserved quadripartite structure, gene content and inverted‐repeat boundaries across diverse gesneriad lineages. Sliding‐window analyses identified hypervariable regions suitable as molecular markers, while SSR and long‐repeat characterisation support investigations into population structure and repetitive sequence evolution. Phylogenetic reconstructions based on complete plastomes yield a highly resolved maternal genealogy of Old World subtribes, clarifying deep divergences and refining the placement of enigmatic taxa. This work establishes the groundwork for future studies of diversification in karst specialists and offers a standardised suite of loci for broad comparative analyses.

Molecular Phylogenetics of Gesneriaceae Plants publication trend

The graph below shows the total number of articles in molecular phylogenetics of gesneriaceae plants across all publications each year (not limited to Nature Index journals).

Technical terms

Molecular phylogenetics: The use of gene and genome sequence data to infer evolutionary relationships among organisms.

Plastome: The complete chloroplast genome, typically a circular DNA molecule with conserved gene content and structure.

Inverted repeat (IR): Two identical sequences in reverse orientation that separate the large and small single‐copy regions in a plastome.

Monophyly: A group of organisms that includes a common ancestor and all its descendants, forming a distinct clade.

Simple sequence repeats (SSRs): Short, tandemly repeated DNA motifs used as molecular markers for genetic diversity and population studies.

Sliding‐window analysis: A computational method to scan genome alignments for regions of high sequence variability.

References

1. Plastome evolution and phylogenomics of Trichosporeae (Gesneriaceae) with its morphological characters appraisal. Frontiers in Plant Science (2023).
2. Comparative chloroplast genome analyses of Paraboea (Gesneriaceae): Insights into adaptive evolution and phylogenetic analysis. Frontiers in Plant Science (2022).
3. Plastomes of limestone karst gesneriad genera Petrocodon and Primulina, and the comparative plastid phylogenomics of Gesneriaceae. Scientific Reports (2022).