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A Molecular Framework for the Phylogeny of the Ant Subfamily Dolichoderinae

✍ Scribed by Maria Chiotis; Lars S Jermiin; Ross H Crozier

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
122 KB
Volume
17
Category
Article
ISSN
1055-7903

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✦ Synopsis

Partial sequences are reported for the mitochondrial genes for cytochrome oxidase subunits 2 and 3 and for cytochrome b, and the entire sequence of the gene for tRNA UUR Leu for species from 14 genera of dolichoderine ants and from three outgroup genera. Considerable variation was observed between tRNA genes in the size of the T⌿C arm and the DHU and anticodon loops and whether or not the T⌿C stem possesses a GC pair. The outgroup taxa showed complete TAA CO1 stop codons, but dolichoderines have either TA or T. The outgroup taxa showed a noncoding gap between the CO1 and the tRNA UUR Leu genes. A phylogeny-independent compatibility test using the amino acid sequences showed differences between the genes consistent with variation in evolutionary rates, according with other studies. Base compositions proved heterogeneous between species, hence phylogenetic analysis was restricted to the protein sequences using maximum likelihood and the mtREV24 replacement matrix. A maximum-likelihood consensus tree has similarities to those from morphological studies with some exceptions such Leptomyrmex falling within the dolichoderine genera rather than basally, and the accretion of genera formerly included under Iridomyrmex. Features of the tRNA genes and the CO1 termination codons agree quite well with the molecular phylogeny.

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