Document Type
Article
Publication Version
Published Version
Publication Date
11-1999
Journal or Book Title
Theoretical and Applied Genetics
Volume
99
Issue
7-8
First Page
1166
Last Page
1178
DOI
10.1007/s001220051321
Abstract
The effects of breeding on allele frequency changes at 82 restriction fragment length polymorphism (RFLP) loci were examined in two maize (Zea mays L.) populations undergoing reciprocal recurrent selection, Iowa Stiff Stalk Synthetic and Iowa Corn Borer Synthetic #1. After 12 cycles of selection, approximately 30% of the alleles were extinct and 10% near fixation in each population. A test of selective neutrality identified several loci in each population whose allele frequency changes cannot be explained by genetic drift; interpopulation mean expected heterozygosity increased for that subset of 28 loci but not for the remaining 54 loci. Mean expected heterozygosity within the two subpopulations decreased 39%, while the between-population component of genetic variation increased from 0.5% to 33.4% of the total. Effective population size is a key parameter for discerning allele frequency changes due to genetic drift versus those resulting from selection and genetic hitchhiking. Empirical estimates of effective population size for each population were within the range predicted by the breeding method.
Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Recommended Citation
Labate, J. A.; Lamkey, Kendall R.; Lee, Michael; and Woodman, W. L., "Temporal changes in allele frequencies in two reciprocally selected maize populations" (1999). Agronomy Publications. 38.
https://lib.dr.iastate.edu/agron_pubs/38
Included in
Agricultural Science Commons, Agriculture Commons, Agronomy and Crop Sciences Commons, Genetics Commons, Plant Breeding and Genetics Commons
Comments
This article is from Theoretical and Applied Genetics 99 (1999): 1166–1178, doi:10.1007/s001220051321.