INBREEDING IN RELATION TO EGG PRODUCTION 289 



form. The hatching records of these pens were comparable with those of the 

 inbred pens, there being 2 genetically high, 2 medium and 4 low (Hays and 

 Sanborn, 1924). 



Practically all of the birds in the three inbred pens traced to foundation hen 

 C 1124. Her line of inbreds was the only survivors of the original inbreds as 

 the plan of matings for 1928 shows. Pen 2 females were superior to those of 

 pen 1 or pen 3, particularly from the standpoint of intensity and annual egg 

 production. Pen 2 did show more broodiness, however, than pen 1, but less 

 broodiness than pen 3. Inbred pens 1 and 3 were very similar in the character- 

 istics being considered. The two pens appeared to differ only in amount of 

 broodiness and slightly in persistency. Their mean annual egg records were 

 almost identical. These two pens really represented descendants of foundation 

 hen C 1124, and pen 2 represented a more intimate concentration of the heritage 

 from C 1124. 



Results of Matings — 1928 



The sex ratios on surviving chicks were sUghtly lower in the three original 

 inbred pens after intercrossing than in the original check pen under inbreeding. 

 The ratio was 95 males to 100 females in the first group compared with 102 

 males to 100 females in the second group. 



