The mating and breeding of poultry

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Framed Print of The mating and breeding of poultry

The mating and breeding of poultry. me or not, is almost universally used bysuccessful breeders, but is often accompanied by theoccasional and judicious introduction of outside blood.The chart following, Fig. 9, shows one method ofline breeding. In this chart. Circle 1 represents a maleand Circle 2 a female, whose blood it is desired to use inthe line breeding without the introduction or at any ratewithout the frequent introduction of new blood. Male 1mated with female 2 gives offspring 3, which are one-halfeach of the blood of the male and the female. A malefrom 3 mated with the original fem The mating and breeding of poultry. me or not, is almost universally used bysuccessful breeders, but is often accompanied by theoccasional and judicious introduction of outside blood.The chart following, Fig. 9, shows one method ofline breeding. In this chart. Circle 1 represents a maleand Circle 2 a female, whose blood it is desired to use inthe line breeding without the introduction or at any ratewithout the frequent introduction of new blood. Male 1mated with female 2 gives offspring 3, which are one-halfeach of the blood of the male and the female. A malefrom 3 mated with the original female 2 gives offspring 6, which are three-quarters of the blood of the female. Sim-ilarly, a female from 3 mated with the original male 1 PRACTICES OF BREEDING 23 gives offspring 4, which are three-quarters of the bloodof the male. A male from 7 mated with a female from 4gives offspring 9, which are 13-16ths of the blood of themale. Further, a male from 9 mated with a female from7 gives offspring 13, which are 27-32nds of the blood of. I ^»^ ^ i^ hH ifX-® ^^€). Fig. 9—Line Breeding Chart—The circles represent individuals or groups ofindividuals used in the breeding or resulting from the matings made. Blackrepresents the male line and white the female line, the relative amount ofeach color in a circle as well as the fractional figures at the side indicating therelative amount of each blood carried. 1!he large number at the top of eachcircle is given to it so as to make the discussion of the matings in the textclear and easy to follow. A solid black line connecting one circle with an-other indicates that a male from the first group was used in the mating toproduce the second group, while a dotted line indicates that a female wasused. The shaded circle at the lower right-hand comer indicates the intro-duction of a third blood line, and circle 18 shows the proportion of the threebloods in the resulting offspring. (After Felch, Pierce and Lippincott.). © The Reading Room

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Media ID 40140049