TAILIEUCHUNG - báo cáo khoa học: "How to be a self-fertile hermaphrodite"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: How to be a self-fertile hermaphrodite | Génét. Sél. Evol. 1983 15 1 83-90 How to be a self-fertile hermaphrodite . GOUYON . L Emberger . 5051 F 34033 Montpellier Cẹdex and . Paris Grìgnon F 75231 Paris Cedex 05 Summary The model of Charnov et al. 1976 on sex investments in hermaphrodites is modified to include self-fertilization. The modified model here shows that selfing in hermaphroditic organisms should increase maternal investment. However in gynodioecious species the degree of maternal investment should be affected by the amount of heterosis in the population. Key-words Sex allocation game theory selfing gynodioecy. Resume Comment être un hermaphrodite auto-compatible Le modèle de Charnov et al. 1976 sur les investissements reproductifs chez les hermaphrodites est modiíié par I introduction de l autofécondation. Les résultats montrent que I autofecondation devrait augmenter I investissement dans la fonction femelle chez les especes hermaphrodites. Cependant chez les espèces gynodioiques 1 investissement femelie doit être augmenté OU diminué selon 1 intensité de 1 hétérosis dans la population. Mots-clés Allocation au sexe théorie des jeux autofecondation gynodioécie. I. Introduction In a purely hermaphroditic population the investments of hermaphrodites in the male and female functions are approximately equivalent according to the model of Charnov Maynard-Smith Bull 1976 . Gynodioecious populations are composed of female individuals and hermaphrodite individuals. Hermaphrodites in gynodioecious populations are predicted to have a greater investment in paternal investment and therefore a decrease in maternal investment. This can be easily explained by competition among hermaphrodites for the pollination of females. Their model using the game I theory is an alternative to the classical interpretation of the evolution of sex it does 84 . GOUYON not take into account the effect of sexual strategies on the breeding structure of populations. It is necessary to incorporate both aspects

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