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Report of Sub-Committee for Study of Practice and Methods of Crossbreeding

Abstract

The problems of crossbreeding have received considerable study during the past year by individual members of the subcommittee, but it has not seemed feasible yet to attack the problem as a group.

In its most literal sense crossbreeding involves the production of first generation animals by the crossing of individuals of two distinct and recognized breeds. In practice, however, there are all degrees of crossbreeding and there may be all sorts of combinations of more or less temporary or permanent schemes. In a genetic sense, also, crossbreeding is a question of degree, involving both the genetic differences between the animals crossed and the continuity of adherence to any particular plan. Except in respect to degree (and sometimes in that also) matings within a recognized breed may, from a purely genetic standpoint, as truly involve the principles of crossbreeding as do those which come under the generally accepted definition.

Different types of crossbreeding have long been in use and are still a common practice.