No. 908

Title:

Different gene flow and reproductive mechanisms may involve similar fine-scale spatial genetic structures

Author(s):

Shimatani, Kenichiro (The Institute of Statistical Mathematics);

Key words:

spatial pattern; regeneration; safe site; seed dispersal; point process; pollen flow.

Abstract:

Fine-scale spatial genetic structure is not determined only by limited seed dispersal and pollen flow but is also affected by spatial individual distribution patterns such as clustering or regularly spacing. In addition, clustering structure can be formed not only by limitedly dispersed seeds around mothers but also by limited safe sites, and distances of seed dispersal should be differently quantified. Using artificial populations created by marked point processes, this paper illustrates how (1) spatial individual distribution, density (female reproductive success) and genetic structure of parents, (2) seed dispersal and pollen flow and (3) the two regenerating systems causing patch structure influence spatial genetic structure and spatial individual distribution of offspring. For example, similar genetic structures can be formed from differently structured parents and/or by different gene flow, and different genetic structures can be resulted from the same seed dispersal distance but of the different meanings. Spatial genetic structure only can hardly estimate gene flow, and basic ecological information is indispensable..