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Abstract Detail

MSA - Systematics/Evolution

Gryganskyi, Andrii [1], Humber, Richard A. [2], Vilgalys, Rytas [1].

LSU rDNA phylogeny for the subphylum Entomophthoromycotina insertae sedis.

The recently elevated subdivision Entomophthoromycotina (D.S. Hibbett et al. 2007) includes zygomycetous parasites of many diverse arthropod hosts and saprotrophs. Species in this group are of special interest as biological control agents for economically important insect pests. Over 300 described species are known, however, the actual number of species belonging to this group is likely to be much greater. In this study we present ongoing research to resolve phylogenetic relationships within the order Entomophthorales and other zygomycetous fungi. Preliminary analyses of LSU rDNA showed consistent placement for 30 entomophthoralean taxa into 2 clades: the genus Basidiobolus and the remaining taxa. Basidiobolus isolates form their own group. The genus Conidiobolus appears polyphyletic and forms three distinctive groups. One group contains C. coronatus, C. lamprauges and C. osmodus and is separate from the "core" Entomophthorales and is possibly more closely related to the Basidiobolus clade. Other Conidiobolus species are distributed among the "entomopathogenic part" of Entomophthoromycotina. Thus, the genus Conidiobolus may need a thorough revision. "Core" Entomophthorales form several distinct clades; however, many species have weakly supported placement. It is possible that this is due to poorly defined species boundaries, particularly in for genera Pandora, Erynia and Entomophthora. Analyses of additional specimens and loci should be combined with the re-examination of morphological characters to help resolve these inconsistencies.

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1 - Duke University, Department of Biology, 139 Biological Sciences Building, PO Box 90338, Durham, North Carolina, 27708, USA
2 - USDA-ARS Biological Integrated Pest Management Research Unit, Robert W. Holley Center for Agriculture and Health, Tower Road, Ithaca,, NY, 14853, USA

none specified

Presentation Type: Poster:Posters for Topics
Session: P2
Location: Event Tent/Cliff Lodge
Date: Tuesday, July 28th, 2009
Time: 5:30 PM
Number: P2SE062
Abstract ID:858