Document Detail

Inbred decorated crickets exhibit higher measures of macroparasitic immunity than outbred individuals.
MedLine Citation:
PMID:  20125187     Owner:  NLM     Status:  MEDLINE    
Inbreeding is assumed to have negative effects on fitness, including the reduced ability to withstand immune challenges. We examined the immunological consequences of inbreeding in decorated crickets, Gryllodes sigillatus, by comparing lytic activity, phenoloxidase (PO) activity, and encapsulation ability of crickets from eight inbred lines with that of crickets from the outbred founder population. Surprisingly, crickets from inbred lines had a greater encapsulation ability compared with crickets from the outbred population. We suggest that because inbred crickets have reduced reproductive effort, they may, therefore, have the option of devoting more resources to this form of immunity than outbred individuals. We also found that both inbred and outbred females had higher immunity than males in PO activity and implant darkness. This result supports the hypothesis that females should devote more effort to somatic maintenance and immunity than males. PO activity and implant darkness were heritable in both males and females, but lytic activity was only heritable in females. Males and females differed in the heritability of, and genetic correlations among, immune traits, suggesting that differences in selective pressures on males and females may have resulted in a sexual conflict over optimal immune trait values.
S N Gershman; C A Barnett; A M Pettinger; C B Weddle; J Hunt; S K Sakaluk
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-02-03
Journal Detail:
Title:  Heredity     Volume:  105     ISSN:  1365-2540     ISO Abbreviation:  Heredity     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-18     Completed Date:  2010-11-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0373007     Medline TA:  Heredity     Country:  England    
Other Details:
Languages:  eng     Pagination:  282-9     Citation Subset:  IM    
Behavior, Ecology, Evolution and Systematics Section, School of Biological Sciences, Illinois State University, Normal, IL, USA.
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MeSH Terms
Animals, Outbred Strains / genetics,  immunology*
Gryllidae / genetics,  immunology*
Immunity / genetics,  immunology*
Monophenol Monooxygenase / metabolism*
Muramidase / metabolism
Reg. No./Substance:
EC Monooxygenase; EC

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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