MAIZE BREEDING 



195 



TABLE XLTI. INHERITANCE OF PROTEIN IN THE FIRST GENERATION CROSSES 



BETWEEN ILLINOIS Low PROTEIN AND ILLINOIS HIGH PROTEIN 



AND STADTMUELLER'S LEAMING 



Self-fertilization seems a logical means of obtaining pure races 

 of different chemical compositions. Numerous ears should be 

 self-fertilized and analyzed. Those that appear of promise may 

 then be used and their breeding nature determined by the prog- 

 eny test. As soon as homozygous forms containing the 

 desired characters have been isolated, they may be used as 

 foundation stock for the production of an improved variety. 

 That high protein races may thus be isolated has been shown by 

 Hayes and Garber (1919). 



TABLE XLIII. PROTEIN CONTENT OF SELFED STRAINS OF MINNESOTA No. 

 13 AND CROSSES BETWEEN THEM 



Average protein content 



These same workers showed that there was a correlation be- 

 tween the number of seeds produced by particular self-fertilized 

 FI ears of the crosses A, B, and K, and protein content. Low 

 number of seeds per ear was correlated with high protein content. 

 The FI crosses, A, 5, and K, yielded slightly more than normal 



