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Heat tolerance among different strains of the entomopathogenic nematode Heterorhabditis bacteriophora

John Mukuka, Olaf Strauch, Lieven Waeyenberge, Nicole Viaene, Maurice Moens (UGent) and Ralf-Udo Ehlers
(2010) BIOCONTROL. 55(3). p.423-434
Author
Organization
Abstract
Quality of biological control products based on entomopathogenic nematodes can be severely damaged due to exposure to high temperature surpassing 40A degrees C. The study screened 36 natural populations and 18 hybrid or inbred strains of Heterorhabditis bacteriophora for their response to high temperature. Nematodes were tested with or without prior adaptation to heat at 35A degrees C for 3 h. Five strains of H. indica and one of H. megidis were also included. Molecular identification using nuclear ribosomal DNA sequences confirmed the designation to the three Heterorhabditis spp. The mean tolerated temperature ranged from 33.3A degrees C to 40.1A degrees C for non-adapted and from 34.8A degrees C to 39.2A degrees C for adapted strain populations. H. indica was the most tolerant, followed by H. bacteriophora and H. megidis. No correlation was recorded between tolerance assessed with and without adaptation to heat, implying that different genes are involved. Correlation between heat tolerance and mean annual temperature at place of origin of the strains was weak. A high variability in tolerance among strains and the relatively high heritability (hA(2)A = 0.68) for the adapted heat tolerance recorded for H. bacteriophora provide an excellent foundation for future selective breeding with the objective to enhance heat tolerance of H. bacteriophora.
Keywords
H. megidis, Biological control, selective breeding, adaptation, H. indica, enhanced heat tolerance, LOW-TEMPERATURE ACTIVITY, STEINERNEMA-CARPOCAPSAE, NATURAL-POPULATIONS, STRESS TOLERANCE, MASS-PRODUCTION, REPRODUCTION, SHOCK, INFECTIVITY, PERSISTENCE, RHABDITIDA

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Citation

Please use this url to cite or link to this publication:

MLA
Mukuka, John et al. “Heat Tolerance Among Different Strains of the Entomopathogenic Nematode Heterorhabditis Bacteriophora.” BIOCONTROL 55.3 (2010): 423–434. Print.
APA
Mukuka, J., Strauch, O., Waeyenberge, L., Viaene, N., Moens, M., & Ehlers, R.-U. (2010). Heat tolerance among different strains of the entomopathogenic nematode Heterorhabditis bacteriophora. BIOCONTROL, 55(3), 423–434.
Chicago author-date
Mukuka, John, Olaf Strauch, Lieven Waeyenberge, Nicole Viaene, Maurice Moens, and Ralf-Udo Ehlers. 2010. “Heat Tolerance Among Different Strains of the Entomopathogenic Nematode Heterorhabditis Bacteriophora.” Biocontrol 55 (3): 423–434.
Chicago author-date (all authors)
Mukuka, John, Olaf Strauch, Lieven Waeyenberge, Nicole Viaene, Maurice Moens, and Ralf-Udo Ehlers. 2010. “Heat Tolerance Among Different Strains of the Entomopathogenic Nematode Heterorhabditis Bacteriophora.” Biocontrol 55 (3): 423–434.
Vancouver
1.
Mukuka J, Strauch O, Waeyenberge L, Viaene N, Moens M, Ehlers R-U. Heat tolerance among different strains of the entomopathogenic nematode Heterorhabditis bacteriophora. BIOCONTROL. 2010;55(3):423–34.
IEEE
[1]
J. Mukuka, O. Strauch, L. Waeyenberge, N. Viaene, M. Moens, and R.-U. Ehlers, “Heat tolerance among different strains of the entomopathogenic nematode Heterorhabditis bacteriophora,” BIOCONTROL, vol. 55, no. 3, pp. 423–434, 2010.
@article{867423,
  abstract     = {Quality of biological control products based on entomopathogenic nematodes can be severely damaged due to exposure to high temperature surpassing 40A degrees C. The study screened 36 natural populations and 18 hybrid or inbred strains of Heterorhabditis bacteriophora for their response to high temperature. Nematodes were tested with or without prior adaptation to heat at 35A degrees C for 3 h. Five strains of H. indica and one of H. megidis were also included. Molecular identification using nuclear ribosomal DNA sequences confirmed the designation to the three Heterorhabditis spp. The mean tolerated temperature ranged from 33.3A degrees C to 40.1A degrees C for non-adapted and from 34.8A degrees C to 39.2A degrees C for adapted strain populations. H. indica was the most tolerant, followed by H. bacteriophora and H. megidis. No correlation was recorded between tolerance assessed with and without adaptation to heat, implying that different genes are involved. Correlation between heat tolerance and mean annual temperature at place of origin of the strains was weak. A high variability in tolerance among strains and the relatively high heritability (hA(2)A = 0.68) for the adapted heat tolerance recorded for H. bacteriophora provide an excellent foundation for future selective breeding with the objective to enhance heat tolerance of H. bacteriophora.},
  author       = {Mukuka, John and Strauch, Olaf and Waeyenberge, Lieven and Viaene, Nicole and Moens, Maurice and Ehlers, Ralf-Udo},
  issn         = {1386-6141},
  journal      = {BIOCONTROL},
  keywords     = {H. megidis,Biological control,selective breeding,adaptation,H. indica,enhanced heat tolerance,LOW-TEMPERATURE ACTIVITY,STEINERNEMA-CARPOCAPSAE,NATURAL-POPULATIONS,STRESS TOLERANCE,MASS-PRODUCTION,REPRODUCTION,SHOCK,INFECTIVITY,PERSISTENCE,RHABDITIDA},
  language     = {eng},
  number       = {3},
  pages        = {423--434},
  title        = {Heat tolerance among different strains of the entomopathogenic nematode Heterorhabditis bacteriophora},
  url          = {http://dx.doi.org/10.1007/s10526-009-9255-4},
  volume       = {55},
  year         = {2010},
}
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