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A Molecular Phylogeny of the Aphidiinae (Hymenoptera: Braconidae)

✍ Scribed by Robert Belshaw; Donald L.J. Quicke

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 331 KB
Volume: 7
Category: Article
ISSN: 1055-7903
DOI: 10.1006/mpev.1996.0400

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✦ Synopsis

Phylogenetic relationships within the Aphidiinae, and between this and other subfamilies of Braconidae (Hymenoptera), were investigated using sequence data from three genes: elongation factor-1alpha, cytochrome b, and the second expansion segment of the 28S ribosomal subunit. Variation in both protein-coding genes was characterized by a high level of homoplasy, but analysis of the expansion segment--robust over a range of alignment methods and parameters-resolved some of the older divergences. Parsimony analysis of the combined data suggests the following tribal relationships: (Ephedrini + (Praini + (Aphidiini + Trioxini))). In addition, the cyclostome subfamilies were found to form a clade separate from the Aphidiinae, but relationships between the Aphidiinae and the noncyclostome braconids could not be resolved. The inferred phylogeny also supported a secondary loss of internal pupation within the Praini and a polyphyletic origin of endoparasitism within the Braconidae.

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