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Laboratory selection of resistance by the red flour beetle, tribolium castaneum (Herbst), to an atmosphere of low oxygen concentration
Year:
1990
Source of publication :
Phytoparasitica
Authors :
Donahaye, Ezra Jonathan
;
.
Volume :
18
Co-Authors:
Donahaye, E., Stored Products, ARO, The Volcani Center, Bet Dagan, 50250, Israel
Facilitators :
From page:
189
To page:
202
(
Total pages:
14
)
Abstract:
Adult populations of the red flour beetle, Tribolium castaneum (Herbst), were exposed for 40 generations to an atmosphere containing 99.5% N2 and 0.5% O2 at 95% RH, in order to select a strain resistant to the low oxygen concentration (LOC) atmosphere. Selection pressure was maintained at between 50% and 70% mortality. At the 40th generation comparison of sensitivity between the selected strain and the original non-selected strain indicated a resistance factor at the 50% mortality level (LT50) of x 5.2. However, throughout the selections, log-time against probit-mortality curves remained roughly parallel from generation to generation and the slope remained low. These findings indicate a multiplicity of genetic factors that at a high level of selection contribute together towards an adaptation of the insects to survival in the LOC atmosphere. Removal of selection pressure from a sub-population of the selected strain from the 13th to 21st generation revealed that resistance was partially retained with a decrease in resistance factor of 23%. Although the study revealed that the insects were able to develop a strain resistant to hypoxia, exposures were at 95% RH to minimize the desiccation effect. This does not reflect field situations, where ambient relative humidities are generally below 70%. © 1990 Springer Science + Business Media B.V.
Note:
Related Files :
modified (controlled) atmospheres
Oxygen
Resistance
Tribolium castaneum
Show More
Related Content
More details
DOI :
10.1007/BF02980989
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21904
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:47
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Scientific Publication
Laboratory selection of resistance by the red flour beetle, tribolium castaneum (Herbst), to an atmosphere of low oxygen concentration
18
Donahaye, E., Stored Products, ARO, The Volcani Center, Bet Dagan, 50250, Israel
Laboratory selection of resistance by the red flour beetle, tribolium castaneum (Herbst), to an atmosphere of low oxygen concentration
Adult populations of the red flour beetle, Tribolium castaneum (Herbst), were exposed for 40 generations to an atmosphere containing 99.5% N2 and 0.5% O2 at 95% RH, in order to select a strain resistant to the low oxygen concentration (LOC) atmosphere. Selection pressure was maintained at between 50% and 70% mortality. At the 40th generation comparison of sensitivity between the selected strain and the original non-selected strain indicated a resistance factor at the 50% mortality level (LT50) of x 5.2. However, throughout the selections, log-time against probit-mortality curves remained roughly parallel from generation to generation and the slope remained low. These findings indicate a multiplicity of genetic factors that at a high level of selection contribute together towards an adaptation of the insects to survival in the LOC atmosphere. Removal of selection pressure from a sub-population of the selected strain from the 13th to 21st generation revealed that resistance was partially retained with a decrease in resistance factor of 23%. Although the study revealed that the insects were able to develop a strain resistant to hypoxia, exposures were at 95% RH to minimize the desiccation effect. This does not reflect field situations, where ambient relative humidities are generally below 70%. © 1990 Springer Science + Business Media B.V.
Scientific Publication
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