Abstract
An analysis is presented of the reproductive cycle in an experimental population of barley. The experimental design included growing three different generations of the population in the same year and environment, thus permitting an assessment of the mating system at three stages in the evolutionary history of the population, unconfounded by environmental differences. Gene frequencies sometimes differed significantly in adults and in the effective pollen pool. It was also found that out-crossing rate more than doubled during the twenty generations spanned by the study. These results provide evidence for selection during reproductive phases of the life cycle. They also demonstrate that evolution in this predominantly self-pollinating population was in the direction of increased recombinational potential.
Keywords: reproductive cycle, partial self-fertilization, mixed mating model, gametic selection, linkage disequilibrium
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Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Allard R. W., Kahler A. L., Weir B. S. The effect of selection on esterase allozymes in a barley population. Genetics. 1972 Nov;72(3):489–503. doi: 10.1093/genetics/72.3.489. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Brown A. H., Allard R. W. Estimation of the mating system in open-pollinated maize populations using isozyme polymorphisms. Genetics. 1970 Sep;66(1):133–145. doi: 10.1093/genetics/66.1.133. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Clegg M. T., Allard R. W., Kahler A. L. Is the gene the unit of selection? Evidence from two experimental plant populations. Proc Natl Acad Sci U S A. 1972 Sep;69(9):2474–2478. doi: 10.1073/pnas.69.9.2474. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Weir B. S., Allard R. W., Kahler A. L. Analysis of complex allozyme polymorphisms in a barley population. Genetics. 1972 Nov;72(3):505–523. doi: 10.1093/genetics/72.3.505. [DOI] [PMC free article] [PubMed] [Google Scholar]