Mathematical Study of the Evolution of Gynodioecy with Cytoplasmic Inheritance under the Effect of a Nuclear Restorer Gene.
Mathematical Study of the Evolution of Gynodioecy with Cytoplasmic Inheritance under the Effect of a Nuclear Restorer Gene.
复制标题
核恢复基因作用下具有细胞质遗传的雌雄异株进化的数学研究。
作者：
X. Delannay;P. Gouyon;G. Valdeyron
一项研究描述了将显性核恢复基因引入细胞质雌花两性花植物群体的影响。这项研究包括考虑细胞核、细胞质和性别（表型）因素对女性相对生育力的单独影响。在这些假设下，将显性核恢复基因引入细胞质雌花两性花群体中可以导致几种不同的情况：细胞质雌花两性花的持续存在、核-细胞质雌花两性花的出现、核雌花两性花的出现或雄性育性的完全恢复。在数学模型中发展稳定的核-细胞质雌花异株是新的，并且由于考虑了单独的相对雌性生育力而成为可能。以前从未获得过细胞质雌花两性花转化为核花两性花的可能性。它可能构成植物种群中后一种雌雄异株出现的途径。最后，讨论了雌花异株从一种到另一种，以及雌雄异株进化的可能性，以及一些似乎与观察到的实际情况相对应的理论方案。
A study is described of the influence of the introduction of a dominant nuclear restorer gene into a cytoplasmic gynodioecious plant population. This study includes the consideration of separate effects on the relative female fertility of nuclear, cytoplasmic and sex (phenotypic) factors. Under these assumptions, the introduction of a dominant nuclear restorer gene into a cytoplasmic gynodioecious population can lead to several different situations: persistence of cytoplasmic gynodioecy, appearance of a nuclear-cytoplasmic gynodioecy, appearance of a nuclear gynodioecy or complete restoration of male fertility. The development of stable nuclear-cytoplasmic gynodioecy in a mathematical model is new and is possible because of the consideration of the separate relative female fertilities. The possibility of a transformation of cytoplasmic gynodioecy into a nuclear one has never been obtained before. It could constitute a route for the appearance of this latter kind of gynodioecy in plant populations. Finally, the possibilities of evolution of gynodioecy from one kind to the other, and towards dioecy, are discussed, as are some theoretical schemes that seem to correspond to observed actual situations.