FUNCTIONAL VARIATION 



more significant, a difference of over 30 per cent in the feed 

 required for a pound of gain. This shows the inferior feeding 

 quality of the lower grades, due partly to age and partly to lack 

 of breeding. 



Composition of corn as influenced by functional deviation. One 

 hundred and sixty-three good seed ears were selected from a 

 strain of corn known as Burr's White. 1 They presented to the 

 eye no more differences than are usual with seed corn. Three 

 rows of kernels from each were analyzed for protein and also 

 for fat. As a result the protein in the various ears was found 

 to range from 8.25 per cent to 13.87 per cent and the fat from 

 3.84 per cent to 6.02 per cent. 



- COMPOSITION OF CORN FROM 163 DIFFERENT EARS 



1 This was the foundation of Dr. Hopkins' work in corn breeding at the Uni- 

 versity of Illinois, as reported in Bulletin A'o. j-j- and Bulletin A r o. too. It will be 

 further discussed later on. 



