Lol, I wonder how much those researches are accurate, and how they can give a genetic map of an entire population without testing each and everyone's genome or at least sizable share of it. For example I look at the OP's map and I see that entire Europe is covered with it, I just wonder when and where they gentically tested Serbian population in such numbers and territorial spread that they can give accurate map of genetics of Serbia? Lord knows I wasn't tested, non of my family was tested, non of the people I know was tested and as far as I know I never heard or read that there was any serious genetical study of the Serbian population, and yet there is it, a map with very precisely given distribution of certain haplogroup on certain area, including the variations in the same population. Now I'm not an expert but I think that creating of such precise map with such a precise data would have to be a result of the huge research including litterally millions of samples from milions of people. Just for Serbia there should be taken thousands and thousands of samples from the same number of people from every corner of the country, yet I haven't heard of any genetists roaming around Serbian countryside taking blood samples from the people. I think we can make some small research here on our own, I'll call all Serbian members of this forum to give a statement if they themselves or members of their family or any of their friends were a subject of any genetical study, or they even heard of anyone being subject of such study, I bet that there won't be many positive answers.