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Introduction

Regional Swine Breeding Laboratory

Abstract

I have been requested to serve for Dean Rice since he could not be here. It is a pleasure to do something for him but we all regret his inability to be with us.

We all know that selection has been used by man and by nature for a long time. Changes in respect to conformation and performance have resulted in populations as the breeders have applied their skills in forming and improving breeds of livestock. Recently it has seemed that certain economically important characters in the established breeds are acting stubbornly toward the breeder's efforts to extend improvement.

It is only within the last few years that data from meat producing animals have become available for study with respect to selection pressure being applied and the response being experienced by experimental investigators. Dean Rice arranged also for a discussion of the contribution which may be made by small laboratory animals to aid in selection studies.