472 



CORN 



horny gluten, also contain most of the ash, yet a high percentage of 

 the ash in the germ is associated with a low percentage of oil, and 

 vice versa, indicating that the ash content of the germ (which contains 

 the major part of the ash of the entire kernel) , bears a more constant 

 relation to the oil-free material in the germ than to the whole germ. 

 By computing, we find that the oil-free germs contain the percentages 

 of ash as given in the following, assuming the oil to contain no ash, 

 which is approximately correct. 



PERCENTAGE OF ASH IN GERMS. 



From Low Protein Corn 

 From High Protein Corn 



From Low Oil Corn 



From High Oil Corn. . . . 



Breeding for high or low protein produces no marked effect upon 

 the ash content of either the germs or the endosperm, nor does it have 

 any effect upon the oil content of either of these, and only slightly 

 influences the protein content of the germs. The low protein germs 

 contain about i8 per cent of protein and the high germs about 2i per 

 cent. The results show that such breeding produces exceedingly 

 marked effects upon the protein content of the endosperms, the low 

 protein endosperms containing about 6 per cent and the high protein 

 endosperms containing about 14 per cent protein. In this connection 

 it is well to remember that the corn kernel only contains about 11 

 per cent of germ, while the endosperm amounts to about 89 per cent 

 of the kernel. The significance of this becomes more readily apparent 

 by an examination of the following table, which shows where the 

 protein actually exists in 100 pounds of corn. 



PROTEIN IN ONE HUNDRED POUNDS OF CORN. 



