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| Modern Genetic Analysis Chapter 12. Genomics Pigs taking part in the international pig genome mapping project, PiGMaP. Two pure parental strains, Large White and Meisham, differ by many molecular and morphological markers. These lines are crossed and the F1 hybrids are interbred to produce an F2. In the F2, the various patterns of marker assortment are used to determine linkage and to map the genome. In this picture, the reclining sow is an F1 hybrid and the variously colored nursing piglets are F2 progeny. (Reproduced with the kind permission of the Roslin Institute, Edinburgh.)

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