Wade M J, Stevens L
Department of Ecology and Evolution, University of Chicago, IL 60637.
J Theor Biol. 1994 Mar 7;167(1):81-7. doi: 10.1006/jtbi.1994.1052.
Over 20 species of arthropods are known to harbor an endosymbiotic bacterium, Wolbachia associated with partial reproductive incompatibility. The micro-organism spreads through a random mating population with positive frequency dependence. Many insect populations, however, are subdivided to some degree. In this paper we model the effect of population subdivision on the rate of spread of Wolbachia and show that it slows the rate of spread of the micro-organism but by itself cannot cause a stable polymorphism. The effects of the micro-organism on host fitness, partial incompatibility, and environmental curing are also investigated, both for panmictic and subdivided populations. In all cases, population subdivision slows the rate of spread relative to a panmictic population, but does not produce a stable polymorphism of infection.
已知有超过20种节肢动物体内携带着一种内共生细菌——沃尔巴克氏体，它与部分生殖不相容性有关。这种微生物通过随机交配群体以正频率依赖的方式传播。然而，许多昆虫种群在一定程度上是细分的。在本文中，我们对种群细分对沃尔巴克氏体传播速率的影响进行了建模，结果表明这会减缓该微生物的传播速率，但仅凭其自身不会导致稳定的多态性。我们还研究了这种微生物对宿主适合度、部分不相容性以及环境治愈的影响，涵盖了随机交配种群和细分种群的情况。在所有情况下，相对于随机交配种群，种群细分都会减缓传播速率，但不会产生感染的稳定多态性。
