63 
Jan. 5 , i 9 2 4 Seed-Color Inheritance in Sorghum Crosses 
Table: VIII .—Distribution of seed-color in the F 3 generation of the cross White kafirX 
Red kafir in 1922 
Designation. 
F 2 heads, red seeds: 
1-2. 
1- 5. 
2- 1. 
2-2. 
2-3. 
2-5 .. 
Total, 6 progenies. 
F 2 heads, white seeds: 
i -3 . 
1- 6. 
2- 4. 
Total, 3 progenies. 
F 2 heads, light red seeds: 
1-1. 
1- 4 . 
2- 6. 
Total, 3 progenies. 
Expected (3:1 ratio). 
Deviation, 6±5.36. 
Dev. 
P. E.’ 
=1.119. 
Total 
number of 
1 Number of plants with— 
plants. 
! Red seeds. 
1 
White seeds. 
120 
j 
120 
O 
117 
117 
O 
97 
97 
O 
107 
107 
O 
104 
104 
O 
114 
114 
O 
659 
659 
O 
135 
0 
135 
114 
0 
114 
”5 
0 
115 
364 
0 
364 
117 
»5 
32 
no 
81 
29 
no 
81 1 
29 
j 337 
247 
90 
1 
253 
84 
WHITE KAFIR X SUNRISE KAFIR 
A cross was made between White kafir and Sunrise kafir in 1919. The 
F,, F 2 , and F s plants grown from this cross produced kernels typical of 
white kafir in color, indicating that the genetic factors governing color of 
seed in these two varieties were the same. 
SUMMARY 
The seeds of feterita and Blackhull kaoliang are a chalky opaque 
white. These varieties also have a well developed brown nucellar layer 
lying directly outside of the aleurone layer. 
Seeds of Sunrise kafir are creamy white, with a smooth or glossy 
pericarp. No brown nucellar layer is present in the kernels of this variety. 
Crosses between feterita or Blackhull kaoliang and Sunrise kafir 
produce V' 1 plants with light brown seeds with brown nucellar layer. 
In the F 2 generation of these crosses segregation occurs, the seed color 
of the three phenotypes being (a) brown seeds with brown nucellar layer, 
(1 b ) white seeds with brown nucellar layer, and (c) white seeds with no 
brown nucellar layer. The ratio of these classes is approximately 91314. 
Results obtained in the F 3 generation confirm the two-factor hypoth¬ 
esis of color inheritance in these crosses. 
Red kafir seed is of a dark red color, with no brown nucellar layer. A 
cross between feterita and Red kafir produces a reddish-brown kernel 
with brown nucellar layer in the F x generation. 
