16 JOURNAL OF THE WASHINGTON ACADEMY OF SCIENCES VOL. 11, NO. 1 



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In the second genera- 

 tion it was found that 

 the pericarps and cob 

 colors again behaved as 

 a unit, only plants with 

 red cobs and red pericarps 

 and plants with white 

 cobs and white pericarps 

 being found. 



The distribution of the 

 plants with respect to the 

 color of the cob and the 

 character of the culm is 

 shown in table 2. 



Although, as in the first 

 instance, the progenies 

 vary in the degree of 

 relationship, the per cent 

 of "crossovers" for the 

 entire group is remark- 

 ably close to that of the 

 liguleless X brachytic 

 hybrid. 



A third cross involving 

 brachytic culms and cob 

 color has also been carried 

 through the second gen- 

 eration. In this cross the 

 parent of normal stature 

 was a segregate from a 

 crossbetweenZai tunicaia 

 and Z. ramosa and had a 

 red cob but a white peri- 

 carp, while the brachytic 

 parent, as in the other 

 crosses, had both cob and 

 pericarp white. 



