Phylogenetic Genomics of Liliaceae Species

The Liliaceae family, comprising over 600 species across temperate and subtropical regions, has been the focus of intensive phylogenomic study in recent years. Researchers have harnessed complete chloroplast genomes, nuclear ribosomal markers and targeted gene regions to resolve deep and shallow divergences within the family. These analyses have clarified relationships among major lineages such as Lilium, Fritillaria and allied genera, revealing previously unrecognised paraphyly and instances of reticulate evolution. Time‐calibrated phylogenies, informed by fossil and molecular clocks, place key diversification events in the Miocene, coinciding with orogeny and climatic shifts in Eurasia and North America. Comparative genomics has identified mutation hotspots and structural rearrangements, including expansions and contractions of inverted repeat regions, which serve as robust characters for delimiting subclades. These advances have not only refined taxonomic boundaries but also underpinned efforts to conserve endangered lilies by highlighting cryptic lineages and setting priorities for ex‐situ preservation. The integration of plastome, nuclear and mitochondrial data sets continues to yield a more cohesive picture of Liliaceae evolution, demonstrating the power of high‐throughput sequencing in resolving complex plant radiations.

Research from Nature Portfolio

Complete chloroplast genome analyses of multiple Lilium species have provided unprecedented resolution of inter‐specific relationships. Comparative studies of sixteen plastomes revealed ten mutational hotspots and single nucleotide polymorphism densities sufficient to support a fully resolved species‐level tree, clarifying deep‐branching nodes that eluded earlier marker‐based approaches. In parallel, comprehensive sequencing of eight Fritillaria plastomes identified over a hundred simple sequence repeats and highly variable intergenic regions, which were developed into molecular markers for robust species discrimination. Phylogenetic reconstructions from these data sets demonstrated fully congruent topologies across large single‐copy, small single‐copy and inverted repeat partitions, establishing a stable backbone for the genus and supporting further biogeographical and pharmacological investigations.

Phylogenetic Genomics of Liliaceae Species publication trend

The graph below shows the total number of articles in phylogenetic genomics of liliaceae species across all publications each year (not limited to Nature Index journals).

Technical terms

Plastome: The complete genome of a plastid, typically comprising the circular DNA within chloroplasts, and used for high‐resolution phylogenetic inference.

Chloroplast genome: A self‐replicating circular DNA molecule in plant chloroplasts, encoding genes essential for photosynthesis and genome maintenance.

Molecular marker: A specific DNA sequence used to detect polymorphisms among lineages, facilitating species identification and population studies.

Monophyly: A grouping in which all members share a common ancestor and include all descendants of that ancestor, indicating evolutionary coherence.

Inverted repeat region: Two identical or nearly identical sequences in reverse orientation within organelle genomes, contributing to structural stability and useful for phylogenetic characterisation.

References

1. Historical biogeography and evolutionary diversification of Lilium (Liliaceae): New insights from plastome phylogenomics. Plant Diversity (2023).
2. Lilium liangiae, a new species in the genus Lilium (Liliaceae) that reveals parallel evolution within morphology. Frontiers in Plant Science (2024).
3. Chloroplast genomic resources for phylogeny and DNA barcoding: a case study on Fritillaria. Scientific Reports (2018).
4. Complete chloroplast genome sequences of Lilium: insights into evolutionary dynamics and phylogenetic analyses. Scientific Reports (2017).