PRINCIPLES OF POULTRY BREEDING 89 



color, showed, first, in a lower fertility of eggs, in a lower 

 percentage of fertile eggs hatched, and in a higher rate of 

 mortality in the chickens, that there was a loss of vigor 

 due to inbreeding mother to son. Second, the result showed 



OREGON STATION HEN C543, AND THE EGGS SHE LAID IN 



A YEAR 291 

 An exceptional layer though inbred. 



decreased egg yield in the pullet offspring. From different 

 matings the inbred pullet offspring showed a lower average 

 egg yield than other matings not inbred. 



Again, it is claimed that inbreeding tends to uniformity 



