Dispersal and gene flow in free-living marine nematodes

Table 1 Evolutionary processes leading to an increased or decreased genetic differentiation between natural populations of species

Evolutionary process	Genetic differentiation between populations	Genome wide effects
Mutation	Increases	No
Gene flow	Decreases	Yes
Genetic drift	Increases	Yes
Divergent selection	Increases	No
Balancing selection	Decreases	No

Gene flow and genetic drift act on the whole genome, while mutation and selection are acting on specific genomic regions.

ISSN: 1742-9994