What factor is primarily associated with the breed's smaller, more localized gene pool?
Answer
Its background serving essential roles on farms and homesteads.
The historical background demonstrating hardiness and utility on Southern farms correlates with a gene pool that developed more locally compared to breeds developed for national popularity.

Related Questions
Which major kennel club does not currently recognize the Mountain Cur breed?Where does the Mountain Cur find its formal registry home?What historical region in the United States forms the foundation of the Mountain Cur's history?What factor is primarily associated with the breed's smaller, more localized gene pool?What functional characteristics make the Mountain Cur valuable as a utility dog?Why does the breed typically maintain a comparatively small population size?What effect does the absence from the AKC registry have on the Mountain Cur?According to anecdotal evidence, where is the Mountain Cur population most likely to remain clustered?When seeking a reputable breeder for this breed, what is a better indicator of availability than general popularity indexes?What is one factor that adds complexity to tracking the total Mountain Cur population count?