Abstract
Six laboratory populations of Drosophila paulistorum were examined for changes in gene frequencies at an enzyme locus, tetrazolium oxidase (To). In some of the populations, the alleles were introduced on over 100 independently derived chromosomes. These populations showed considerable stability in gene frequencies although they were at widely different starting frequencies. Other populations were begun with only a few (about 6) independently derived chromosomes. These populations showed significant and somewhat erratic changes in To gene frequencies. The difference in behavior of the two sets of populations was almost certainly caused by linkage effects due to sample size. The implication of these studies in understanding the role of the founder effect in natural populations is briefly discussed.
Keywords: allozymes, polymorphisms
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Brewer G. J. Achromatic regions of tetrazolium stained starch gels: inherited electrophoretic variation. Am J Hum Genet. 1967 Sep;19(5):674–680. [PMC free article] [PubMed] [Google Scholar]
- Lakovaara S., Saura A. Location of enzyme loci in chromosomes of Drosophila willistoni. Experientia. 1972 Mar 15;28(3):355–356. doi: 10.1007/BF01928737. [DOI] [PubMed] [Google Scholar]
- Ohta T., Kimura M. Development of associative overdominance through linkage disequilibrium in finite populations. Genet Res. 1970 Oct 2;16(2):165–177. doi: 10.1017/s0016672300002391. [DOI] [PubMed] [Google Scholar]
- Powell J. R. Heterosis at an enzyme locus of Drosophila: evidence from experimental populations. Heredity (Edinb) 1974 Feb;32(1):105–108. doi: 10.1038/hdy.1974.9. [DOI] [PubMed] [Google Scholar]
- Richmond R. C. Enzyme variability in the Drosophila willistoni group. 3. Amounts of variability in the superspecies, D. paulistorum. Genetics. 1972 Jan;70(1):87–112. doi: 10.1093/genetics/70.1.87. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Richmond R. C., Powell J. R. Evidence of heterosis associated with an enzyme locus in a natural population of Drosophila. Proc Natl Acad Sci U S A. 1970 Nov;67(3):1264–1267. doi: 10.1073/pnas.67.3.1264. [DOI] [PMC free article] [PubMed] [Google Scholar]