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PMID: 1516822 Published · ppublish English Journal Article

Evolution of multilocus genetic structure in an experimental barley population.

Genetics ·Vol. 131 ·No. 4 ·1992-08-00 ·Pages 957-69

Allard RW, Zhang Q, Maroof MA, Muona OM

Abstract

Data from 311 selfed families isolated from four generations (F8, F13, F23, F45) of an experimental barley population were analyzed to determine patterns of change in character expression for seven quantitative traits, and in single-locus allelic frequencies, and multilocus genetic structure, for 16 Mendelian loci that code for discretely recognizable variants. The analyses showed that large changes in single-locus allelic frequencies and major reorganizations in multilocus genetic structure occurred in each of the generation-to-generation transitions examined. Although associations among a few traits persisted over generations, dynamic dissociations and reassociations occurred among several traits in each generation-transition period. Overall, the restructuring that occurred was characterized by gradual decreases in the number of clusters of associated traits and increases in the number of traits within each cluster. The observed changes in single-locus frequencies and in multilocus genetic structure were attributed to interplay among various evolutionary factors among which natural selection acting in a temporally heterogeneous environment was the guiding force.

MeSH Terms
Alleles Biological Evolution Crosses, Genetic DNA, Ribosomal/genetics Gene Frequency Hordeum/genetics Plants/genetics
Chemicals
DNA, Ribosomal
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Allard R W
Department of Genetics, University of California, Davis 95616.
Zhang Q
Maroof M A
Muona O M
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Article Info
Journal
Genetics
Abbr.
Genetics
ISSN
0016-6731
DOI
10.1093/genetics/131.4.957
Published
1992-08-00
Pages
957-69
Language
English
Region
United States
NLM ID
0374636
PMCID
PMC1205105
Subset
IM
External Links
PubMed source DOI: 10.1093/genetics/131.4.957 PMC Full Text View journal details
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