Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support

Genetic Differentiation of Fitness-Associated Traits Among Rapidly Evolving Populations of the Soapberry Bug

Scott P. Carroll, Hugh Dingle and Stephen P. Klassen
Evolution
Vol. 51, No. 4 (Aug., 1997), pp. 1182-1188
DOI: 10.2307/2411048
Stable URL: http://www.jstor.org/stable/2411048
Page Count: 7
  • Get Access
  • Read Online (Free)
  • Download ($4.00)
  • Cite this Item
If you need an accessible version of this item please contact JSTOR User Support
Genetic Differentiation of Fitness-Associated Traits Among Rapidly Evolving Populations of the Soapberry Bug
Preview not available

Abstract

In this study we used reciprocal rearing experiments to test the hypothesis that there is a genetic basis for the adaptive differences in host-use traits among host-associated soapberry bug populations (described in Carroll and Boyd 1992). These experiments were conducted on two host races from Florida, in which differences in beak length and development were found between natural populations on a native host plant species and those on a recently introduced plant species (colonized mainly post-1950). Performance was generally superior on the host species from which each lab population originated (i.e., on the 'Home' host species): in analysis of variance, there was significant population-by-host interaction for size, development time, and growth rate. These results indicate that the population differences in nature are evolved rather than host induced. Increased performance on the introduced host was accompanied by reduced performance on the native host, a pattern that could theoretically promote further differentiation between the host races.

Page Thumbnails

  • Thumbnail: Page 
1182
    1182
  • Thumbnail: Page 
1183
    1183
  • Thumbnail: Page 
1184
    1184
  • Thumbnail: Page 
1185
    1185
  • Thumbnail: Page 
1186
    1186
  • Thumbnail: Page 
1187
    1187
  • Thumbnail: Page 
1188
    1188