Effects of population dynamics and dispersal on the formation of spatial genetic structure in gray-sided vole populations

由于大多数种群在相互作用中长期维持自身，因此了解种群结构对于了解其可持续性机制至关重要。在这项研究中，我对一个啮齿动物种群的结构进行了为期4年的调查，考虑了它们的动态（遗传漂变）和分散（基因流动）。主要结果如下：(1)基因流动规模在性别间存在差异。雌鳞（500 m）小于雄鳞（2000 m）；(2)基于mtdna和微卫星dna的空间结构存在差异。基于微卫星dna的种群包括几个基于mtdna的种群；(3)种群动态对雌性的影响显著。在低密度年，遗传漂变效应大于基因流效应。

Since most populations long sustain themselves in their mutual interaction, the knowledge about the population structure is essential to understand a mechanism of their sustainability. In this study I investigated the structure of a rodent population for 4 years taking their dynamics (genetic drift) and dispersal (gene flow) into consideration. The main results are as follows: (1) A scale of gene flows differed between sexes. Females' scale (500 m) was smaller than males' (2000 m); (2) The spatial structure differed between mtDNA-based and microsatellite DNA-based structure. A microsatellite DNA-based population included several mtDNA-based populations; (3) Effects of population dynamics was significant in females. Effects of genetic drift dominated over those of gene flow in a low density year.