344 



The Journal of Heredity 



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PEDIGREE OF FAVOURITE 



Figure 3. Charles Ceiling's bull, Favourite 252, might be considered the foundation bull 

 of the Shorthorns, as his blood became more widely distributed in the developing breed than 

 that of any other bull. Favourite was inbred to a considerable extent, 19.2 per cent, which 

 means that he was 19.2 per cent less heterozygous than the random-bred foundation stock. 

 As an illustration of his influence in the early history of the breed it may be mentioned 

 that forty years after Favourite's death there was a closer relationship between him and 

 the cows of the famous Dutchess strain, bred by Thomas Bates, than between ordinary 

 parent and offspring. 



to theory. The results in regular sys- 

 tems of breeding, such as continued 

 brother-sister mating, it should be said. 

 can be worked out much moi"e simply 

 by special methods." The case is 



merely brought up here to show the 

 application of the general formula 

 which must be used in dealing with 

 the irregular systems encountered in 

 ordinary pedigrees. 



