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

Artificial Selection on a Fitness-Component in Drosophila melanogaster

Michael R. Rose
Evolution
Vol. 38, No. 3 (May, 1984), pp. 516-526
DOI: 10.2307/2408701
Stable URL: http://www.jstor.org/stable/2408701
Page Count: 11
  • Read Online (Free)
  • Download ($4.00)
  • Subscribe ($19.50)
  • Cite this Item
If you need an accessible version of this item please contact JSTOR User Support
Artificial Selection on a Fitness-Component in Drosophila melanogaster
Preview not available

Abstract

The apparent maintenance of significant additive genetic variances for components of fitness is one of the major puzzles to have come out of recent research on the quantitative genetics of fitness. This issue was addressed by means of artificial selection for increased early fecundity in a Drosophila melanogaster population which had been maintained under stable conditions for over 100 generations. An initial direct response to artificial selection indicated that this population could be maintaining the genetic variability for fecundity which had been detected earlier by means of sib analysis, but the response was not sustained in later generations. Crossing selected with selected lines and control with control lines resulted in the recovery of the initial response to artificial selection, suggesting that inbreeding may have had significant effects. The results of selection-relaxation provided no evidence of natural selection acting to erase the gains achieved by artificial selection. A variety of hypotheses for explaining these results are tenable. Deciding between them requires further experimentation. In particular, it did not prove possible to test the antagonistic pleiotropy hypothesis for the maintenance of genetic variation for fitness components.

Page Thumbnails

  • Thumbnail: Page 
516
    516
  • Thumbnail: Page 
517
    517
  • Thumbnail: Page 
518
    518
  • Thumbnail: Page 
519
    519
  • Thumbnail: Page 
520
    520
  • Thumbnail: Page 
521
    521
  • Thumbnail: Page 
522
    522
  • Thumbnail: Page 
523
    523
  • Thumbnail: Page 
524
    524
  • Thumbnail: Page 
525
    525
  • Thumbnail: Page 
526
    526