Cavies for Pleasure and Profit; An Encyclopaedia of Valuable Knowledge for the Amateur as Well as Professional Breeder of Cavies (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 edition. Excerpt: ...the blood of the original male. Now select the best male from Group No. 8 and the females from Group No. 6, and produce Group No. 11, which contains one-half the blood of each of the original pailr. This is the third step and the seventh mating in securing complete breeding of a new strain. We now come to a point where we wish to establish a male line whose blood is virtually the same as that of the original female. To accomplish this select a male from Group No. 6 and mate him to the female of Group No. 4 and produce Group No. 9, which is thirteen-sixteenths the blood of the original female No. 1 and three-sixteenths the blood of the original male. Again select a male from Group No. 9 and a female from Group No. 11, which will produce Group No. 14, which is twenty-one thirty-seconds the blood of the original female. Now mate a male from Group No. 13, which is thirteensixteenths the blood of the original male No. 2, to the females of Group No. 10, which are five-sixteenths the blood of the original male, and produce Group No. 17, which is nine-sixteenths the blood of the said male, while in No. 16 we have the new strain, and in Group No. 18 the strain of our original male. Remember that the dotted line represents the female selection and the solid line the male selection. Of course, every care must be taken when line-breeding, and results must be watched very closely. While it is expected that in line-breeding "like produces like," this may not always be the case, and as soon as one is discovered that is not up to the standard leave him out of the race at once, and continue with those that do come up to your expectations. In line-breeding a person always looks for with line-breeding the stock must be watched very closely, and as...