Molecular Phylogenetics and Taxonomy of Annonaceae

The Annonaceae, a pantropical family comprising over 2,500 species in more than 100 genera, occupies a pivotal position among early-divergent angiosperms. Molecular phylogenetics has transformed its taxonomy by integrating data from chloroplast, mitochondrial and nuclear genomes. Combined plastome and nuclear gene analyses have resolved deep divergences between the two major subfamilies, Annonoideae and Malmeoideae, and clarified the placement of enigmatic genera. These studies underscore the monophyly of most tribes while revealing non-monophyletic lineages that warrant taxonomic revision. Advances in sequencing technologies and target enrichment of hundreds of loci now allow robust inference of species-level relationships and biogeographical histories. Such integrative approaches have refined genus boundaries, identified cryptic diversity and informed conservation priorities in biodiversity hotspots. The resulting classification framework balances stability with responsiveness to new data, enhancing our understanding of evolutionary trajectories within this ecologically and economically important family.

Research from Nature Portfolio

A comprehensive chloroplast supermatrix analysis encompassing hundreds of markers across 700+ species has reconstructed the largest phylogeny of the family to date. Fifteen principal clades were recovered, corresponding largely to recognised tribes, and five previously enigmatic genera were placed within this framework. This work validated a novel tribe to accommodate an isolated lineage and highlighted several non-monophyletic genera, prompting recommendations for future taxonomic revision. The resulting tree provides a reference backbone for comparative studies of character evolution, biogeography and diversification dynamics.

Molecular Phylogenetics and Taxonomy of Annonaceae publication trend

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

Technical terms

Chloroplast markers: DNA regions from the plastid genome commonly used to infer plant phylogenies due to their moderate rate of evolution and uniparental inheritance.

Target enrichment: a sequencing approach that isolates and sequences many specific genomic regions to increase resolution in phylogenetic analyses.

Monophyly: the condition in which a group of organisms consists of all the descendants of a common ancestor.

Inverted repeat (IR): duplicated regions in the plastid genome that influence genome stability and size variation.

Supermatrix: a concatenated alignment of multiple genes or genomic regions used to infer a single comprehensive phylogeny.

References

1. A mega-phylogeny of the Annonaceae: taxonomic placement of five enigmatic genera and support for a new tribe, Phoenicantheae. Scientific Reports (2017).
2. Comparative analysis of plastid genomes reveals rearrangements, repetitive sequence features, and phylogeny in the Annonaceae. Frontiers in Plant Science (2024).
3. Phylogenomics of the Major Tropical Plant Family Annonaceae Using Targeted Enrichment of Nuclear Genes. Frontiers in Plant Science (2019).
4. Generic status of Winitia (Annonaceae, Miliuseae) reaffirmed by molecular phylogenetic analysis, including a new species and a new combination from Thailand. European Journal of Taxonomy (2020).