What does it mean that political party affiliations can be significantly influenced by genes?

A recent study found some evidence that suggests that political party affiliation can be strongly influenced by genes, in association with a number of other factors. If true, what are the implications of this?

Here’s a passage from the article about the study:

To find a significant linkage region that may implicate certain genetic markers is not to say that a particular gene determines a particular behavior. Nor do our results advocate that genes have some greater effects than that of the environment. This is certainly not the case. Rather, we are starting from two opposite ends of a very complex process: DNA, somewhere near the very basic matter of what living organisms are made of on one end; and an expressed complex behavior (political ideology) on the other. Behavior is the final end product of all that goes in and out of what it is to be human, interacting in a complex and changing environment during one’s lifecycle (e.g., puberty, menopause, etc.). We have barely begun to understand what goes on in between those two spaces, which makes this area of research exciting, while also inspiring caution. The understanding that we cannot yet accurately map how genes influence brain processes and biological mechanisms which in turn interact with our upbringing, social life, personal experience, the weather, diet, etc, to somehow be expressed in part as a ConservativeLiberal orientation, is the exact reason that genomewide analyses are valuable and necessary for political science. Human behavior emerges from the interaction and interplay of genes, socialization and environmental stimuli, working through ontogenetic neurobiological processes embedded in an evolutionary framework (Dobzhansky 1973). So far as the data suggest, a theory and method which includes genetic influences, no matter how large or small, accounts for portions of Conservative-Liberal orientations that environment-only models do not.