Peer-Reviewed Journal Details
Mandatory Fields
Rolston, A;Meade, C;Boyle, S;Kakouli-Duarte, T;Downes, M
2009
January
Nematology
Intraspecific variation among isolates of the entomopathogenic nematode Steinernema feltiae from Bull Island, Ireland
Published
4 ()
Optional Fields
POLYACRYLAMIDE-GEL ELECTROPHORESIS DNA REPEAT UNIT HETERORHABDITIS-BACTERIOPHORA REPRODUCTIVE INCOMPATIBILITY NATURAL-POPULATIONS GENETIC-VARIABILITY INTRON SEQUENCES WOLBACHIA RHABDITIDA CARPOCAPSAE
11
439
451
The application of large numbers of entomopathogenic nematodes (EPN) to control insect pests of agriculture is likely to have an impact on the local EPN fauna, yet little is known about the intraspecific relationships between EPN populations, particularly with regard to phylogeny and outbreeding. Here we assess the fitness, with regards to fecundity, host insect mortality and time taken to produce progeny, of isolates of Steinernema feltiae from Bull Island, Ireland. Exon-primed, intron-crossing (EPIC) PCR was used to examine intraspecific phylogenies between S. feltiae isolates, and identified up to three possible colonisation events of Bull Island. EPIC-PCR grouped two isolates, 33.D.(2) and 59.F.(2), separately from the remaining ten S. feltiae isolates These same two isolates consistently performed poorly in all fitness assessments. Following the crossbreeding of all isolates in Galleria mellonella, the number of host cadavers exhibiting emerging infective juveniles was significantly fewer than expected and there were significant differences between isolates in the number of days until progeny were observed. Host insect mortality varied between 40 and 87%. Such intraspecific variation may be a result of adaptation to different microhabitats of Bull Island, which in turn may be accentuated by laboratory culture practices.
LEIDEN
1388-5545
10.1163/156854109X447015
Grant Details