ECOLOGICAL CONSTRAINTS ON THE ESTABLISHMENT OF A NOVEL POLYPLOID IN COMPETITION WITH ITS DIPLOID PROGENITOR
ECOLOGICAL CONSTRAINTS ON THE ESTABLISHMENT OF A NOVEL POLYPLOID IN COMPETITION WITH ITS DIPLOID PROGENITOR
复制标题
DOI：
10.1086/284307
复制
发表时间：
1984-01-01
影响因子：
2.9
通讯作者：
LEVIN, DA
中科院分区：
文献类型：
--
作者：
FOWLER, NL;LEVIN, DA
新形成的多倍体和它的二倍体亲本物种之一之间的竞争建模。模型基于Lotka-Volterra竞争模型，其中添加了代表正频率依赖性效应（少数劣势）的术语，这是由于从其他细胞型接收不适当的花粉导致生育力降低。一个新的多倍体可能持续存在：由于一个非常小的二倍体群体的组合，两种细胞型之间存在不稳定的平衡，以及偶然事件（可能是最常见的途径），通过取代其二倍体亲本;由于生态位分离，通过与其共存;或者通过竞争和取代它（可能非常罕见）。所有这些可能性的条件都相当有限。该模型和结果是适用于在一定程度上建立其他新的cytotypes，也对竞争资源的物种，也经历少数劣势（也许是因为竞争传粉）相对于彼此。
Competition between a newly formed polyploid and one of its diploid parental species was modeled. Models were based on the Lotka-Volterra competition model, to which were added terms representing the positive frequency-dependent effect (minority disadvantage) as a result of lowered fertility caused by the receipt of inappropriate pollen from the other cytotype. A new polyploid may persist: by replacing its diploid parent as a result of the combination of a very small diploid population, the existence of an unstable equilibrium between the 2 cytotypes, and chance events (probably the most common route); by coexisting with it as the result of niche separation; or by outcompeting and replacing it (probably very rare). The conditions for all of these possibilities are quite restrictive. The model and results are applicable in some degree to the establishment of other novel cytotypes, and also to pairs of species that compete for resources and also experience minority disadvantage (perhaps because of competition for pollinators) with respect to one another.