American accents: pronunciation of yours, /yʊərz/ vs. /yɪərs/

[Rosanna Liuski]

I have heard them both being used, but I wondered that in which parts of America they use them?
The first one /yʊərz/ must be more common, but does the /yɪərs/ have anything to do with the Southern accent?

Please correct me and share yer wisdom, folks! :-D

 

[bubbha]

In my experience, /yərz/ (rhyming with "hers") is very common in the west (California etc.) and north (Minnesota etc.), where I spent most of my formative years.