Prugnolle F, de Meeûs T, Pointier J P, Durand P, Rognon A, Théron A
GEMI, Equipe ESS, UMR-2274 CNRS-IRD, centre IRD, 911 avenue Agropolis, BP 64501, 34394 Montpellier Cedex 5, France.
Parasitology. 2006 Sep;133(Pt 3):313-9. doi: 10.1017/S0031182006000412. Epub 2006 May 24.
We investigated local adaptation in the spatially structured natural Biomphalaria glabrata/Schistosoma mansoni host-parasite system in the marshy forest focus of Guadeloupe using cross-transplantation experiments. We demonstrated strong and highly significant variations in susceptibility/infectivity of host and parasite populations, respectively, but found no evidence of local adaptation neither for S. mansoni nor for B. glabrata. Environmental as well as genetic factors are discussed to explain susceptibility/infectivity variations between both host and parasite populations. The absence of local adaptation is discussed in relation to the metapopulation dynamics of both host and parasite, in particular their relative rates of dispersal at the scale under scrutiny. Our study constitutes the first cross-transplantation experiment concerning this host-parasite system of which both hosts and parasites came directly from the wild, excluding laboratory generations and experimental host passages.
我们在瓜德罗普岛沼泽森林疫区的空间结构自然光滑双脐螺/曼氏血吸虫宿主-寄生虫系统中，通过交叉移植实验研究了局部适应性。我们分别证明了宿主和寄生虫种群在易感性/感染性方面存在强烈且高度显著的差异，但未发现曼氏血吸虫和光滑双脐螺存在局部适应性的证据。我们讨论了环境和遗传因素，以解释宿主和寄生虫种群之间易感性/感染性的差异。结合宿主和寄生虫的集合种群动态，特别是在详细研究尺度下它们的相对扩散速率，讨论了局部适应性缺失的问题。我们的研究构成了关于这个宿主-寄生虫系统的首个交叉移植实验，其中宿主和寄生虫均直接来自野外，排除了实验室繁殖和实验宿主传代。
