This study proposes to investigate the evolutionary consequences of sustained existence at high and low population densities. The study will center on six populations of Drosophila melanogaster, three which have been kept at high densities (K-selected) and three kept at low densities (r-selected). These populations have been evolving under these conditions for over five years (about 100 generations). Changes in density-dependent rates of population growth, density-dependent survival and female size have already been documented for these populations. The present study will investigate (1) differences between r- and K-selected populations in relative competitive ability and efficiency of food utilization; (2) the possibility that heavier K-selected females have higher fecundity and that increased larval viability may be correlated with increased size; (3) the location of genes responsible for increased larval survival and female adult size and the genetic correlation between these traits. The results from this study would increase our understanding of the effects of density on natural populations and have a number of potential applications relevant to human health, such as predicting the reproductive potential of disease vectors.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
1R01GM034303-01
Application #
3285045
Study Section
Genetics Study Section (GEN)
Project Start
1985-01-01
Project End
1987-12-31
Budget Start
1985-01-01
Budget End
1985-12-31
Support Year
1
Fiscal Year
1985
Total Cost
Indirect Cost
Name
Washington State University
Department
Type
Schools of Arts and Sciences
DUNS #
041485301
City
Pullman
State
WA
Country
United States
Zip Code
99164
Moody, M E; Mueller, L D; Soltis, D E (1993) Genetic variation and random drift in autotetraploid populations. Genetics 134:649-57
Mueller, L D (1988) Evolution of competitive ability in Drosophila by density-dependent natural selection. Proc Natl Acad Sci U S A 85:4383-6
Mueller, L D (1987) Evolution of accelerated senescence in laboratory populations of Drosophila. Proc Natl Acad Sci U S A 84:1974-7