Summary
Gene flow between the two sexual forms is asymmetrical in gynodioecious species: genes are transferred from male-fertile individuals (mF, hermaphrodites) to male-sterile individuals (mS, females) by pollen but from mS to MF individuals by diploid seeds. This situation is expected to cause differences in the genetic make up of mF and mS individuals. The expected differences were found in an experiment on a natural population of the gynodioecious species, Thymus vulgaris L. (thyme). The effectiveness of gynodioecy as a means of regulating heterozygosity and adaptability to various conditions of the environment is discussed.
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Literature
Allard, R.W.; Babbel, G.R.; Clegg, M.T.; Kahler, A.L. (1972): Evidence for coadaptation in Avena barbata. Proc. Nat. Acad. Sci. USA 69 (10), 3043–3048
Assouad, S. (1972): Recherches sur la génétique écologique de Thymus vulgaris L. etude expérimentale du polymorphisme sexuel. These Doct. es Sci., USTL Montpellier (n ° C.N.R.S. A.O. 7505)
Assouad, W.; Dommee, B.; Lumaret, R.; Valdeyron, G. (1978): Reproductive capacities of the sexual forms in the gynodioecious species Thymus vulgaris L. Bot. J. Linn. Soc. 77, 29–39
Baker, H.G. (1963): Evolutionary mechanisms in pollination biology. Science 139, 877–883
Bonnemaison, F.; Dommee, B.; Jacquard, P. (1979): Etude experimentale de la concurrence entre formes sexuelles chez le thym, Thymus vulgaris L. Oecol. Plant. 14, (1), 85–101
Braun-Blanquet, J.; Roussine, N.; Negre, R. (1952): Les Groupements Végétaux de la France Mediterranéenne: Edit, du C.N.R.S.
Darwin, C. (1877): The Different Forms of Flowers. London: John Murray
Dommee, B. (1973): Recherches sur la génétique écologique de Tymus vulgaris L. Déterminisme génétique et répartition écologique des formes sexuelles. These Doct. es Sci., USTL Montpellier (n ° C.N.R.S. A.O. 8635)
Dommee, B.; Assouad, W.; Valdeyron, G. (1978): Natural selection and gynodioecy in Thymus vulgaris L. Bot. J. Linn. Soc. 77, 17–28
Elena-Rossello, J.A.; Kheyr-Pour, A.; Valdeyron, G. (1976): La structure genetique et le régime de la réproduction chez Origanum vulgare L. répartition d'un marquer dans deux populations naturelles. C.R. Acad. Sci. Paris 283, 1587–1589
Gouyon, P.H. (1978): Contribution a l'étude du régime de reproduction et du maintien de la variabilité. These Doct. Ing. I.N.A.P.-G
Kheyr'Pour, A. (1975): Déterminisme génétique et répartition écologique de la stérilité male cytoplasmique chez Origanum vulgare L. These Doct. es Sci. USTL Montpellier (n ° C.N.R.S.A.O.11935)
Kimura, M. (1959): Conflict between self-fertilization and outbreeding in plants. Ann. Rep. n ° 9 of Nat. Inst. Genet. (Japan)
Lewis, D. (1941): Male sterility in natural populations of hermaphrodite plants. New Phytol. 40, 56–63
Lloyd, D.G. (1974): Theoretical sex ratios of gynodiecious and dioecious Angiosperms. Heredity 32, 11–34
Maynard-Smith, J. (1978): The evolution of sex. Cambridge: Cambridge University Press
Ross, M.D. (1970): Breeding systems in Plantago. Heredity 25, 129–133
Ross, M.D. (1978): The evolution of gynodioecy and subdioecy. Evolution 32, 174–188
Ross, M.D.; Shaw, R.F. (1971): Maintenance of male sterility in plant populations. Heredity 35, 21–29
Valdeyron, G. (1967): Sur le systéme génétique du figuier Ficus carica L. Essai d'interpretation évolutive. Ann. Inst. Agr. 5, 1–167
Valdeyron, G.; Domme, B.; Valdeyron, A. (1973): Gynodioecy: another computer simulation model. Amer. Nat. 107, 454–459
Valdeyron, G.; Dommee, B.; Vernet, P. (1977): Self-fertilization in male fertile plants of a gynodioecious species: Thymus vulgaris L. Heredity 2, 243–249
Vernet, Ph. (1977): Les variations de composition de l'esśence de Thymus vulgaris L.: mode de transission de trois terpènes (le thymol, le carvacrol et le linalol). C.R. Acad. Sci. 284 n ° 14, 1289–1292
Vernet, P.; Guillerm, J.L.; Gouyon, P.H. (1977): Le polymorphisme chimique de Thymus vulgaris L. (Labiées). 1) Répartition des formes en relation avec certains facteurs écologiques; 2) Carte á l'echelle 1/25000 des formes chimiques dans la région, de St Martin de Londres (Herault, France). Oecol. Plant. 12 (2), 181–194
Williams, G.C. (1975): Sex and Evolution. Princeton, N.J.: Princeton University Press
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Gouyon, P.H., Vernet, P. The consequences of gynodioecy in natural populations of Thymus vulgaris L.. Theoret. Appl. Genetics 61, 315–320 (1982). https://doi.org/10.1007/BF00272847
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DOI: https://doi.org/10.1007/BF00272847