Phylogenetic Analysis in Malvaceae Plant Systems

Phylogenetic analysis in the Malvaceae family has advanced markedly through the application of complete chloroplast genome sequencing, morphological assessment of fossil remains and sophisticated computational methods. Malvaceae comprises nine subfamilies and over 4 200 species of ecological, economic and medicinal importance. Molecular phylogenetics has focused on resolving the relationships among major clades such as Byttneriina and Malvadendrina, on clarifying the basal positions of Helicteroideae and Sterculioideae, and on testing the monophyly of well-known groups like Malvoideae and Bombacoideae. High-throughput sequencing and long-read assemblies have yielded plastomes from diverse taxa, while integration of fossil calibration points has refined divergence time estimates. Together, these approaches underpin a robust phylogenetic framework that informs taxonomy, biogeography, crop improvement and conservation across the family.

Research from Nature Portfolio

Recent work has assembled the complete chloroplast genome of Durio zibethinus using long-read sequencing, revealing a circular plastome of approximately 143 kb that notably lacks the large inverted repeat common in most angiosperms. Comparison of 24 durian varieties uncovered single nucleotide polymorphisms and structural variants, placing the subfamily Helicteroideae in a well-supported sister relationship to Tilioideae and underscoring plastid variation as a tool for lineage discrimination. In parallel, palaeobotanical investigation of a lower Miocene monodominant forest in Japan documented a close association between the fossil wood Wataria parvipora and Byttneriophyllum tiliifolium leaves. Morphological characters of wood and foliage suggest affinities within Helicterioideae or possibly an extinct lineage bridging modern subfamilies, providing a deep-time calibration for molecular clocks and refining subfamily boundaries.

Phylogenetic Analysis in Malvaceae Plant Systems publication trend

The graph below shows the total number of articles in phylogenetic analysis in malvaceae plant systems across all publications each year (not limited to Nature Index journals).

Technical terms

Plastome: The complete DNA sequence of the chloroplast genome in a plant cell.

Monophyly: A group comprising a common ancestor and all its descendants.

Sister clade: Two lineages that share an immediate common ancestor and are each other’s closest relatives.

Maximum likelihood: A statistical method for estimating the most probable phylogenetic tree given sequence data.

Bayesian inference: A probabilistic framework that evaluates the posterior probability of phylogenetic trees using prior information and observed data.

Inverted repeat: A pair of identical or nearly identical sequences in opposite orientation within plastid genomes.

Molecular marker: A specific DNA sequence used to differentiate species, populations or lineages in phylogenetic and population studies.

References

1. Assembly of the durian chloroplast genome using long PacBio reads. Scientific Reports (2020).
2. An exceptionally well-preserved monodominant fossil forest of Wataria from the lower Miocene of Japan. Scientific Reports (2023).
3. The complete chloroplast genome of Diplodiscus trichospermus and phylogenetic position of Brownlowioideae within Malvaceae. BMC Genomics (2023).
4. Comparative Chloroplast Genomics of Gossypium Species: Insights Into Repeat Sequence Variations and Phylogeny. Frontiers in Plant Science (2018).