To tell the truth, I blame my own mother for the way I and my brother turned out. It makes sense, to me at least. My dad was working and going to school while my mom was a stay at home mom. I didn't learn until a few years ago that the reason they divorced when I was 7 was because she was cheating on my dad, and then even more recently, I discovered that it had been with multiple different men. Anyways, I am technically borderline, and I know that my mother didn't really give me a lot of attention, and when I look at my brother who for sure, been tested and certifiably Asperger's, he would have had even less attention growing up than I did.
My dad also seems to have aspergers, and from what I know about his parents, is that he didn't really get a lot of attention from them either and even less so the older he got, and I can see that his older brothers are more normal than him and that his younger brothers are worse than him. I don't know if it would be genetic since I don't really know how my grandparents grew up and don't see asperger traits there.
I think that it is a definite factor in having a child with Asperger's, but since it also appears at such a young age, it could also be genetic. I really only know my own situation though.