the different crosses between 

 these two sorghums were as 

 follows: Fi was uniformly red 

 glumed like the Red Amber 

 sorgo and F2 segregated as 

 shown in Table VI, indicating 

 that there is but a single factor 

 difference between red and black 

 glumes. 



INHERITANCE OF THE AWN 



Dwarf Milo X Feterita 

 In milo the glumes are awned 

 while in feterita they are not 

 awned. In crosses between 

 Dwarf milo and feterita it was 

 found that the awn was a 

 recessive character. In Fi the 

 seeds were unawned and in F2 

 there were 183 plants with un- 

 awned seed to 68 that had awned 

 seed. The calculated number of 

 segregates would be 188 : 63 

 which approaches very closely 

 the actual numbers obtained 

 from the crosses. It would 

 seem, therefore, that the awn 

 in sorghums is a recessive char- 

 acter as it is in most of the small 

 grains. 



INHERITANCE OF SHAPE IN THE 

 GLUME 



Dwarf Milo X Feterita 

 Milo has a broad truncated 

 glume which maintains an ap- 

 pressed position at the outer 

 tip. Feterita glumes on the 

 other hand are ovate with a rath- 

 er acute tip which tends to be- 

 come somewhat involute at 

 maturity and bend away from 

 the seed at the outer end. The 

 progeny of the cross between 

 Dwarf milo and feterita showed 

 the broad truncated shape to be 

 dominant over the narrower 

 ovate shape of the feterita 

 glumes. An analysis of the Fi 

 progeny showed that 187 plants 

 had the truncated glumes, while 

 64 had the narrow ovate glumes. 

 The calculated ratio would be 

 188 :63. 



A FETERITA-KAFIR CROSS 



In shape and general characters this 

 head, which was taken from an Fi plant 

 of the cross between feterita and kafir, 

 resembles the feterita parent, but the 

 seeds are light brown instead of white. 

 (Fig. 6.) 



