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The Minnesota Studies of Crossbreeding Swine¹

University of Minnesota

Abstract

This project was intitiated in the fall of 1928. For six years, the experiment was carried out independently at the West Central Experiment Station, Morris, Minnesota, by Jordan and at the Northwest Experiment Station, Crookston, Minnesota, by Kiser. The back-crossing phase of the project was then conducted for one more year at Crookston and for two more years at Morris. During this time, 1,589 pigs were farrowed alive, and 962 were fed out under experimental conditions. Not all the pigs weaned were fed out under experimental conditions because each year a number were farrowed too late to be inculded very satisfactorily in the feeding trials.

Procedure

The breeds used were the Poland China, Duroc Jersey, Chester White, and Yorkshire. The project was so organized that the same boars that sired the purebred pigs also sired the crossbreds. In addition, the dams of the first-cross pigs were either half or full sisters to the dams of the purebred pigs.

¹ Published as Paper No. 1556 of the Scientific Journal Series of the Minnesota Agricultural Experiment Station.