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Review of Regional Project NC-2

Department of Animal Science, University of Minnesota, St. Paul 55108

ABSTRACT

NC-2 has a long and distinguished history. Cooperators have been the north central states plus Alaska and the Animal Physiology and Genetics Institute (AP & GI) of USDA. North central states are North Dakota, South Dakota, Nebraska, Kansas, Minnesota, Iowa, Missouri, Wisconsin, Illinois, Indiana, Michigan, and Ohio. Of those states North Dakota has never had a contributing project, and Missouri and Nebraska have not participated continuously.

NC-2 originated in 1947 and currently is undergoing its latest quinquennial revision. Emphasis has changed considerably over the years, but some objectives are little different from what they were 29 yr ago. Early objectives of NC-2 stressed prediction of producing and transmitting ability, the investigation of breeding systems with emphasis on inbreeding and crossbreeding, the mode of inheritance of lethals and other abnormalities, and the use of such data for developing more effective programs of dairy cattle improvement.

Early and midterm findings from NC-2 improved predictions of breeding value and indicated that additive genetic variation was of greatest importance in improving most traits of dairy cattle.

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