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Multiplication: From pure lines to commercial crossbreds. Multiplication from pure lines to commercial crossbreeds in broiler breeding. A similar structure is used in turkey breeding. M—Male; F—Female; MLM—Male line male; MLF—Male line female; FLM—Female line male; FLF—Female line female; ML—Male line; FL—Female line; GGP—Great Grandparent; GP—Grandparent; PS—Parent Stock.
