130 



POULTRY CULTURE 



List of Dominant and Recessive Characters in Poultry. 

 {Co7itinued) 



LINE BREEDING, OUTCROSSING, AND INBREEDING 



Breeding together of sire and offspring, or of dam and off- 

 spring, or of brother and sister, is inbreeding, or breeding in 

 and in. 



That veteran breeder of pui'e-bred poultry, I. K. Felch, has 

 to say of line breeding, "deterioration commences the moment 

 there is no change in the blood proportion in the chick with 

 that of sire and dam. The accompanying chart (Fig. 43) 

 shows the progeny of a single pair of birds, a male and a fe- 

 male. It is possible to raise a thousand chickens from a single 

 pair, retaining their health and vigor and egg production 

 inherited by the original pair by careful selection and mat- 

 ing of the progeny." 



In the chart the dotted line represents the females as 

 having been selected from the upper group, while the solid 

 line shows the males as having been taken from the indicated 

 upper group. Each circle represents the progeny. Female 



