There are some strains of Berks that have been selected for less backfat BUT have maintained the marbling. We have a few around here. VERY FEW. My kids raised about 5 or 6 a few years ago for FFA/4H and they won Champion and Reserve Champion with them. Got one Berk gilt we are going to AI this summer for some Berk babies.
Berks are known as a lard/bacon type pig. Meat is mighty fine though and will melt in your mouth.
BBQ ADDICT and Ag Teacher