INBREEDING IN RELATION TO EGG PRODUCTION 269 



Check group 1 was made up of four pullets hatched in 1923. These were two 

 daughters from each of the original full sisters used in 1923. These four pullets 

 were mated in 1924 to an unrelated cockerel from a very heavy laying family of 

 straight Station breeding. Check group 1 was therefore made up in 1924 of 

 hybrid pullets mated to a male of pure Station breeding. 



Check group 2 again consisted of hen C 5465 with the addition of one of her 

 daughters, C 8808. These two birds were mated to male C 5055 that was inbred 

 coming from half brother-sister mating, but he was also half brother to C5465 

 and related to her daughter. 



Check group 3 again included inbred hen C 4746 and the group was supple- 

 mented by two of her daughters, C 7718 and C 7719. Hen C 4746 was again 

 mated to the outside male C 75411 and her two daughters from this mating in 

 1923 were mated to the unrelated production-bred male C 7494 that was used in 

 group 1. 



Inbred group 4 consisted of one of the original sisters C 6127 mated to male 

 C 4658. The mothers of these two birds were full sisters and their sires were 

 half brothers, thus making an approach to brother-sister mating. 



Inbred group 5 was made up of one of the original sisters C 6286 mated to her 

 half brother, both having a common sire. To this group were added two inbred 

 sisters (brother-sister mating) . These last two birds were mated to male C 8289 

 whose dam was B 8254 the identical paternal and maternal granddam of his 

 mates. 



Inbred group 6 contained foundation hen C 1124 mated to her son C 8086, 

 and this son was sired by a son of her full sister. 



Inbred group 7 consisted of two sisters C8079 and C 8333 linebred to B 699 

 and mated to male C 8354 also linebred to B 699. 



Table 7 — Character of Female Breeders — 1924 



Table 7 discloses that 5 out of the 9 females used as check breeders were late 

 maturing and that none of the birds used in the inbred groups was late maturing. 

 These late maturing birds were all sired by the "Standard" color male C 75411 

 introduced from an outside source, and they serve to illustrate the results of mat- 

 ing early maturing hens to a late maturing male. 



