HIGH AND LOW OIL CORN 



471 



and high protein corn; the endosperm from the low protein 

 corn contains less than 6 per cent of protein, while that from the 

 high protein corn contains almost 14 per cent. These results, together 

 with the ones given previously, would seem to show conclusively that 

 to select high protein seed corn by mechanical examination, we should 

 select principally for a large proportion of the more nitrogenous part 

 of the endosperm ; that is, the horny part. To select entirely for large 

 germs will have only a slight effect upon the protein content of the 

 corn, although it will produce a rapid and marked increase in the oil 

 content. 



Referring again to the preceding table, it will be seen that the en- 

 dosperms from the high oil corn contain about i per cent more pro- 

 tein than those from the low oil corn. On the other hand, the germs 

 from the high oil corn contain less protein (17.7 per cent) than those 

 from the low oil corn (21.7 per cent), the difference being 4 per cent 

 protein in favor of the low oil corn. These results .were to be ex- 

 pected, even from a study of the analyses of the 163 ears reported 

 in Illinois Bulletin No. 55 in 1899, which showed that large germs 

 were naturally even richer in oil than the size of germs would indicate, 

 the increased oil tending to decrease the percentage, though not the 

 actual amount of protein in tne germ. 



TABLE SHOWING PER CENT OF GERM AND OIL IN HIGH AND LOW 



OIL CORN. 



It will also be seen that high oil corn contains nearly twice as 

 much germ as low oil corn and that the germs from the high oil corn 

 are nearly one and one-half times richer in oil than the germs from 

 the low oil corn, but that, although the high oil germs contain a 

 larger amount of total protein because of their increased size, they 

 are considerably poorer in percentage of protein than the low oil 

 germs. 



Attention is called to the fact that, although the physical parts of 

 the corn kernel which contain almost all of the oil, viz ; the germ and 



