Perspectives in Myrtaceae evolution from plastomes and nuclear phylogenies

Area of Science:

• Botany
• Phylogenetics
• Molecular Biology

Background:

• Myrtaceae, a diverse woody eudicot family, presents taxonomic challenges due to difficulties in species identification and low phylogenetic support.
• Existing knowledge relies on limited molecular markers, often yielding conflicting results and complicating phylogenetic analysis.

Purpose of the Study:

• To construct a robust phylogenetic topology for Myrtaceae tribes using comprehensive molecular data.
• To resolve conflicting phylogenetic signals and improve the understanding of deep evolutionary relationships within the Myrtaceae family.

Main Methods:

• Phylogenetic analysis based on combined plastid protein-coding sequences and nuclear markers.
• Comparison of novel phylogenetic estimates with previous analyses utilizing fewer molecular markers.

Main Results:

• The study's phylogenetic estimate provides a contrasting topology compared to previous analyses.
• Plastome phylogeny successfully groups the Syzygieae and Eucalypteae tribes.
• Results derived from both nuclear and organellar datasets are consistent and reproducible, challenging prior data on deep Myrtaceae nodes.

Conclusions:

• The new phylogenetic framework offers a more reliable classification for Myrtaceae species.
• This research provides a robust foundation for future studies on Myrtaceae evolution and taxonomy.
• The findings highlight the importance of comprehensive molecular datasets for resolving complex phylogenetic relationships.