. Principles and practice of poultry culture . Poultry. APPLICATION OF PRINCIPLES OF BREEDING 509. Fig. 513. Single-Combed Brown Leghorn cock, very full breast ^ ground all over, and on this ground two or three pencilings of darker brown on each feather, except where feathers are black in wings and tail, and in the hackle where the feathers are striped with black. These Standard color require- ments for the different sexes are in a measure incompatible. There is a natural difference in the coloration of the sexes. The tendency in the male is toward greater intensity of color and the occurrence
. Principles and practice of poultry culture . Poultry. APPLICATION OF PRINCIPLES OF BREEDING 509. Fig. 513. Single-Combed Brown Leghorn cock, very full breast ^ ground all over, and on this ground two or three pencilings of darker brown on each feather, except where feathers are black in wings and tail, and in the hackle where the feathers are striped with black. These Standard color require- ments for the different sexes are in a measure incompatible. There is a natural difference in the coloration of the sexes. The tendency in the male is toward greater intensity of color and the occurrence of the more brilliant color in the distinctive , male plumage ; the tendency in the female is toward a duller tone and a more uniform distribution of colors. But in bisexual reproduc- tion these tendencies in a measure counteract each other, as the breeder of fowls of this color type finds when he tries to produce, from females in which the colors are distributed, males with colors distinctly sep- arated, and from males in which he has segregated the colors in different sections, females in which the colors are distributed through all sections. His difficulties are increased when, as in the penciled varieties, he tries to secure a general separation by sections of color in the male, and in the female the same distribution of color in nearly all sections, with separation of the colors in a distinct pattern in each feather. Very early in the development of colors in black-red types fanciers dis- covered that the production of males and females of the desired colors from matings of Standard specimens was un- certain ; that the male with solid black breast, mated with the female of correct shade and type, was likely to produce (through cross heredity in direct trans- mission, and the blending of colors) "'^m ^ e# H mUm^ p^ W % ^1. *<.'« Fig. 514. Single-Combed Brown Leghorn hen ^ 1 Owned by GroVe Hill Poultry Yards, Waltham, Massachusetts. Photograph by Please
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Keywords: ., bookauthorrobinson, bookcentury1900, bookdecade1910, bookyear1912
