12 
au 
38 
4 
gu 
eu 
GENERATIONS 
a8 
PEMALE LINE 
MALE LINE 
Black denotes the proportion of male blood of origina) mating in successive 
generations. White, the proportion of original female blood. 
The dotted lines signify that a female is taken from the mating and 
mated to a male in the mating to which the arrow points. Straight lines 
signify that a male is taken and mated to a female in the mating to which 
arrow points. 
This chart shows six generations, or two cycles of line breeding. 
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