NDLI: Trade-Off Between Sensitivity and Specificity in the Cabbage Looper Moth Response to Sex Pheromone

Content Provider	Springer Nature Link
Author	Hemmann, Daniel J. Allison, Jeremy D. Haynes, Kenneth F.
Copyright Year	2008
Abstract	The evolution of male moth responses to pheromone blends may be constrained by a trade-off between two response traits: sensitivity and breadth of response. Population genetic simulations predict that if sensitivity and breadth of response are negatively correlated (i.e., a trade-off exists), then selection will favor males with narrow response phenotypes and high sensitivity. Although sensitivity–breadth of response trade-offs are generally assumed to exist and are implicit to the shape of male preference function, this study is the first to provide empirical support measuring behavior at the level of the individual. Previous studies with the cabbage looper, Trichoplusia ni, have documented the existence of a mutant pheromone strain. While mutant females produce a pheromone blend significantly different from wild-type females, mutant males respond equally to the wild-type and mutant pheromone blends. This study used wind tunnel bioassays to document that relative to wild-type males, mutant males had broader response profiles but lower pheromone sensitivity. While wild-type male responses were highest to the wild-type pheromone blend, mutant males did not discriminate among pheromone blends. These results are consistent with a trade-off between breadth of response and sensitivity. Pure wild-type and mutant lines were crossed and hybrid males assayed. Both hybrid types (maternal wild-type and maternal mutant hybrids) responded similarly. Hybrid males had response profiles similar to wild-type males and the reduced sensitivity observed in mutant males. These results suggest a possible hybrid disadvantage and a putative mechanism for reinforcement of male pheromone response traits.
Starting Page	1476
Ending Page	1486
Page Count	11
File Format	PDF
ISSN	00980331
Journal	Journal of Chemical Ecology
Volume Number	34
Issue Number	11
e-ISSN	15731561
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-09-26
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Evolutionary trade-off Lepidoptera Pheromone sensitivity Speciation Trichoplusia ni Wind tunnel Agriculture Biological Microscopy Entomology Biochemistry Ecology
Content Type	Text
Resource Type	Article
Subject	Medicine Biochemistry Ecology, Evolution, Behavior and Systematics

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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