Differential divergences of obligately insect-pathogenic Entomophthora species from fly and aphid hosts.
Three DNA regions (ITS 1, LSU rRNA and GPD) of isolates from the insect-pathogenic fungus genus Entomophthora originating from different fly (Diptera) and aphid (Hemiptera) host taxa were sequenced. The results documented a large genetic diversity among the fly-pathogenic Entomophthora and only minor differences among aphid-pathogenic Entomophthora. The evolutionary time of divergence of the fly and the aphid host taxa included cannot account for this difference. The host-driven divergence of Entomophthora, therefore, has been much greater in flies than in aphids. Host-range differences or a recent host shift to aphid are possible explanations.
Department of Agriculture and Ecology, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C, Denmark. abj@life.ku.dk
Annette Bruun
AB
Jensen
Jørgen
J
Eilenberg
Claudia
C
López Lastra
D000818:Animals; D001042:Aphids / Q000382:microbiology*; D016000:Cluster Analysis; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics*; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000737:chemistry / Q000235:genetics; D004175:Diptera / Q000382:microbiology*; D004773:Entomophthora / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D014644:Genetic Variation; D008969:Molecular Sequence Data; D010802:Phylogeny; D017422:Sequence Analysis, DNA; D017385:Sequence Homology
D004271:DNA, Fungal; D004275:DNA, Ribosomal; D021903:DNA, Ribosomal Spacer