Which breed has erect ears and is referred to as the "mother breed"?

The breed known for having erect ears and is often referred to as the "mother breed" is the Yorkshire. This designation stems from the Yorkshire breed's significant contribution to swine production, especially in terms of mothering ability, reproductive traits, and overall productivity.

Yorkshire sows are highly regarded for their maternal qualities, including large litter sizes, good milk production, and nurturing instincts, which makes them excellent mothers. Additionally, the erect ears of Yorkshire pigs contribute to their distinctive appearance and are often considered a breed characteristic.

The other breeds listed have their unique traits, but they do not share the same level of recognition for maternal superiority as the Yorkshire. For instance, Hampshire pigs are known for their meat quality and distinct coloration, while Duroc pigs are appreciated for their efficient growth rates and carcass quality. Berkshire pigs are recognized for their flavor and quality of meat but do not hold the title of "mother breed." Understanding these attributes helps clarify why Yorkshire is uniquely identified in this context.