234 



BREEDING 



expect, for according to these notions the ancestry 

 of two individuals mated, play a very large part 

 in determining the result of the mating. 



The cross made was this. Instead of mating a 

 pure yellow cotyledoned strain with a pure green one, 

 I mated it with an extracted green of the fifth hybrid 

 generation ; that is to say, with the green printed 

 in italics in the following pedigree : — 



Yellow X Green 

 Yellow 



Pure Yellow 



Hybrid 

 Yellow 



Green 



Pure Yellow 



Hybrid 



Yellow 



Green 



Pure Yellow 



Hybrid 

 Yellow 



Green 



Pure Yellow 



Hybrid 

 Yellow 



Green 



This green was mated with a pure yellow and, accord- 

 ing to the Mendelian theory, the result of the union 

 should be the same as that of a mating between a 

 pure yellow and a pure green. Before considering the 

 actual result, it will be well to look at the ancestries 

 of these two kinds of mating set forth, side by side, in 

 the form of pedigrees : — 



