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Gene Rearrangements in the Mitochondrial Genomes of Whiteflies (Hemiptera: Aleyrodinae): Plesiomorphies, Synapomorphies and Autapomorphies


 Mitochondrial genome rearrangements have been used for defining historical relationships, but there have been incidences of convergences at different taxonomic levels. Here, we sequenced complete mitogenome of Aleurodicus rugioperculatus (Aleyrodidae: Aleurodicinae) to examine gene rearrangements and phylogenetic relationships within the family Aleyrodidae. We identified five gene blocks (I-V) in the whitefly ancestor that are shared plesiomorphies retained in different whitefly lineages. Gene block I is conserved in all whiteflies except three species (Tetraleurodes acaciae and two Bemisia species). Conversely, we detected 83 derived gene boundaries within the family. Mapping these gene boundaries onto a phylogenetic tree revealed that 16 were symplesiomorphies for two subfamilies; 9 were synapomorphies at different taxonomic levels, and 28 autapomorphies for individual species. Bayesian Inference (BI) and Maximum Likelihood (ML) phylogenetic analyses yielded similar topologies supporting the monophyly of Aleyrodinae and Aleurodicinae. Exclusion of PCG third codon positions from phylogenetic analyses improved both node support and consistency with prior analyses. To understand the significance of gene order convergence on phylogeny of the whiteflies, more species-level data is required.