. Practical poultry production . Poultry. 50 PRACTICAL POULTRY PRODUCTION flock by breeding from an unrelated individual, which is, however, of the same breed and variety. This is known as outbreeding, or outcrossing, and is usually done to revive or introduce some character or factor such as vigor, in which the flock is deficient. Crossbreeding. This form of breeding refers to the mating together of two distinct breeds or varieties. The object of crossbreeding is usually the effort to produce a new breed by securing a new combination or blending of characters of the two original breeds. Somet
. Practical poultry production . Poultry. 50 PRACTICAL POULTRY PRODUCTION flock by breeding from an unrelated individual, which is, however, of the same breed and variety. This is known as outbreeding, or outcrossing, and is usually done to revive or introduce some character or factor such as vigor, in which the flock is deficient. Crossbreeding. This form of breeding refers to the mating together of two distinct breeds or varieties. The object of crossbreeding is usually the effort to produce a new breed by securing a new combination or blending of characters of the two original breeds. Sometimes the offspring of the first cross is mated to a third breed to further the blending or to in- troduce still other char- acters that may be de- sired in the new breed. Many of the American breeds and varieties originated as the result of crossbreeding. GRADING UP It sometimes happens that the improvement of the flock is desired wherein the birds are mongrels. In such a case, where the owner cannot afford to purchase a pen of standard-bred fowls, day-old chicks or hatching eggs from which to make a beginning, a standard-bred male may be se- cured. When such a bird is bred on a selected few of the best of the mongrel or grade females and this process con- tinued for several years, a decided improvement will result. While such a practice is not generally recommended in. Figure 52.—A standard-bred male at the head of a mongrel flock will improve the quality of the flocli Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lamon, Harry M; Kinghorne, J. W. (Joseph William). St. Paul, Minn. : Press of Webb Publishing Co.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpoultry, bookyear1920
