. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. CHANGES IN EGG PRODUCTION. 105 Other qualifications besides those exhibited in the egg records are required. A hen is a good breeder only if she produces such a number of pullets that they constitute a satisfactory index of her capacity (â with a given mate) to transmit her o-mi good laAnng qualities. Small families are undesirable, because they are often an inadequate sample of a bird's real breeding quality. As soon as it appears that a breeder's eggs are not hatching well, she is taken from the breedin
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. CHANGES IN EGG PRODUCTION. 105 Other qualifications besides those exhibited in the egg records are required. A hen is a good breeder only if she produces such a number of pullets that they constitute a satisfactory index of her capacity (â with a given mate) to transmit her o-mi good laAnng qualities. Small families are undesirable, because they are often an inadequate sample of a bird's real breeding quality. As soon as it appears that a breeder's eggs are not hatching well, she is taken from the breeding pen and her offspring discarded. A few breeders are discarded for other defects, such as low vitality of their progeny. «o ^ - >- -c > SEP i 340 220 120 ^ OCTl 310 200 100 NOV. 1 260 180 80 DEC. 1 250 160 60 JAN 1 110 140 40 / y yy AGE AT FIRST EGG WINTER PRODUCTION ANNUAL PRODUCTION ^DATE OF FIRST E6G. FEE I 190 120 20 â 13-14 'W-'is -is-ie â 16-17 '17-18 'I8-'I9 '19-20 '20-21 YEAR Fig. 3. â Mean Production of Female Breeders. (From data given in Table I.) Basis of Selection of Breeding Males. The selection of suitable males is quite simple. First, each one comes from a large familj' and is the strongest, the most vigorous and usually the largest member of the group; second, he comes from a good mother; and third, the most important point of all, his sisters must have made good records. ^ The family which produces the largest proportion of females capable of qualifying as breeders is the first choice for one or more males. Naturallj', males â uill be chosen from several families and alwaj^s such as stand highest in desired characteristics. 1 This involves keeping one or more representatives of each family till his sisters' records are 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 work
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