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Genetics in Practical Stock Breeding

New Hampshire Agricultural Experiment Station

Abstract

The art of animal breeding has gone through a process of slow evolution which is characterized by three distinct stages of advancement. Since the earliest days of history mankind has been trying to control in some measure or other the transmission of desirable or undesirable physical characteristics or functions. No other science has been more inviting to our innate curiosity, but its history also shows that no other line of investigation has been more baffling. As a consequence a large part of the earlier work was based on general observation supplemented by no small degree of speculative assumptions. The simple fact that "like produces like" was one of the first of these general observations and its general truism was so striking that it has held the stage since the early records of history. Practically all the progress in animal improvement has been due to intelligent application of this principle.