When it comes to white pig breeds, some popular ones include:

1. Large White (also known as Yorkshire): A widely used breed known for its meat quality.
2. Landrace: Another popular white pig breed known for its prolificacy and mothering ability.
3. Duroc: Though not entirely white, Duroc pigs can have white markings and are known for their meat quality.
4. Hampshire: While predominantly black, Hampshire pigs also have a white belt and are valued for their meat production.

Each of these breeds has its unique characteristics and qualities that cater to different needs in the pig farming industry.