Orchid Phylotranscriptomics: The Prospects of Repurposing Multi-Tissue Transcriptomes for Phylogenetic Analysis and...

Area of Science:

• Botany
• Molecular Phylogenetics
• Genomics

Background:

• The Orchidaceae family is one of the largest plant families, with over 25,000 species, necessitating robust phylogenetic studies.
• Understanding orchid species diversity requires well-supported phylogenies at different taxonomic and geographic levels.
• High-throughput sequencing has generated vast amounts of genomic data, readily available in public repositories.

Purpose of the Study:

• To assess the feasibility of repurposing existing transcriptome data for rapid and accurate orchid phylogenetic analysis.
• To explore phylogenetic insights across deep and shallow evolutionary scales within the Orchidaceae.
• To evaluate the utility of multi-tissue transcriptome data beyond traditional phylogenetic applications.

Main Methods:

• Conducted exhaustive searches for available transcriptome data from orchid species in public repositories.
• Performed re-assembly of retrieved transcriptomes and selected samples based on gene completeness.
• Executed phylogenetic analyses using maximum likelihood and coalescent species tree methods.

Main Results:

• Identified and utilized transcriptomic data from over 100 orchid species, representing 5 subfamilies, 13 tribes, 21 subtribes, and 50 genera.
• Successfully generated phylogenetic insights at both deep and shallow evolutionary scales.
• Demonstrated the effectiveness of repurposed transcriptome data for phylotranscriptomic analysis.

Conclusions:

• Repurposed transcriptome data provides a powerful and efficient tool for advancing orchid phylogenetics.
• This approach enables rapid phylogenetic insights, contributing to a better understanding of orchid species diversity.
• Multi-tissue transcriptome data offers potential for additional biological insights beyond phylogenetic reconstruction.