Vinall and Cron: Improvement of Sorghums 



441 



Table IV: Segregation of Seed Color in the F2 Progeny of Crosses Between Feterita 



AND Red Amber Sorgo 



being a large excess of the former. 

 There was also an excess of whites. 

 Other material from crosses of these 

 two varieties will have to be analyzed 

 to fully establish the value of this 

 hypothesis in regard to the inheritance 

 of the seed color. 



FETERITA X KAFIR AND KAFIR X 

 FETERITA 



In studying the seed color in crosses 

 between feterita and kafir it was ap- 



parent that here also two factors were 

 concerned in the production of color. 

 They did not prove, however, to be 

 the same two that determined color in 

 the Red Amber sorgo seed since the 

 red color was not present in the progeny 

 of the feterita-kafir crosses. The most 

 plausible explanation is that the Black- 

 hull kafir carries the factor B for brown 

 color, but not the R for red and that 

 feterita seed carries a factor S affecting 

 color, but acting as a spreader of the 

 brown pigment which is manifested 



Table V: Segregation of Seed Color in the F2 Progeny of Crosses Between Feterita 



and Blackhull Kafir 



Table VI : Segregation of F2 Progeny According to Color of Glumes 



