10 LUTHER BURBANK 



generation, but the excluded character will 

 reappear in one-fourth of the offspring of the 

 second generation. 



Breeding a wheat with beardless ears and 

 white grain, for example, with a wheat having 

 bearded ears and red grain, all the progeny will 

 be beardless and red-grained; but bearded ears 

 and white grain will reappear, in various com- 

 binations, in one-fourth of the progeny of the 

 second generation. 



It is never safe -for the plant developer to draw 

 exact inferences as to the hereditary tendencies 

 of one plant from observation of a quite differ- 

 ent plant. Nevertheless, it is of interest to 

 observe certain analogies between the wheat 

 grains as studied by Professor Biffen and cer- 

 tain of our plant development already cited. 



In particular we may note that red grain is 

 dominant to white grain, suggesting what we 

 have said as to the dominance of black black- 

 berries over white blackberries. 



Again, the rough leaf surface and bristly stem 

 of the wheat proved dominant to the smooth leaf 

 and smooth stem, suggesting the case of our 

 thorny-stemmed briers in which the thorns 

 proved dominant to smoothness of stem. 



But doubtless the most important revelation 

 made by Professor Biffen's investigation was the 



