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Evidence for Coadaptation in Avena barbata
Open accessAbstract
Two populations of Avena barbata have been sampled intensively and allelic frequencies have been determined on a fine grid for six enzyme loci. The distribution of alleles among microniches within the location occupied by one of these populations (CSA-1) was correlated with environment following patterns of macro- and microdifferentiation previously described in California. Multilocus analyses revealed striking gameticphase disequilibrium for both linked and unlinked loci, and also that two balanced five-locus gametic types, one associated with mesic conditions and the other with more xeric conditions, are in substantial excess at the CSA-1 location. Evidence is presented that these two gametic types are maintained by selection acting on two coadapted combinations of alleles, held together by restriction of recombination resulting from linkage and/or inbreeding. Gametic-phase disequilibrium featuring different allelic complexes were found in each of three microniches in the second population (Geyserville), which occupies a site that is environmentally atypical for A. barbata .
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Citations
Cites
Linkage and selection: Two locus symmetric viability model
Karlin, S., & Feldman, M. W. (1970) · Theoretical Population Biology · doi:10.1016/0040-5809(70)90041-9 · Cited by 174
Cited by
Ecological Determinants of Genetic Structure in Plant Populations
Loveless, M. D., & Hamrick, J. L. (1984) · Annual Review of Ecology and Systematics · doi:10.1146/annurev.es.15.110184.000433 · Cited by 2,060
Hamrick, J. L., Linhart, Y. B., & Mitton, J. B. (1979) · Annual Review of Ecology and Systematics · doi:10.1146/annurev.es.10.110179.001133 · Cited by 866
Estimation of linkage disequilibrium in randomly mating populations
Hill, W. G. (1974) · Heredity · doi:10.1038/hdy.1974.89 · Cited by 605
Eckert, A. J., van Heerwaarden, J., Wegrzyn, J. L., Nelson, C. D., Ross-Ibarra, J., González-Martínez, S. C., & Neale, D. B. (2010) · Genetics · doi:10.1534/genetics.110.115543 · Cited by 396
Isozymes, plant population genetic structure and genetic conservation
Brown, A. H. D. (1978) · Theoretical and Applied Genetics · doi:10.1007/bf00282571 · Cited by 366
Metadata
- Authors
- Allard, R. W., Babbel, G. R., Clegg, M. T., & Kahler, A. L.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 1972-10
- Volume
- 69
- Issue
- 10
- Pages
- 3043-3048
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2006085585
- Cited by
- 218
- References
- 1
- FWCI
- 5.49
- Type
- journal article
- Language
- en
- Open access
- green
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- Allard, R. W., Babbel, G. R., Clegg, M. T., & Kahler, A. L. (1972). Evidence for Coadaptation in Avena barbata. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.69.10.3043
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