16 
Research Bulletin No. 4 
gated ears. The plants that furnished the pollen for 
these crosses were in some cases the same ones whose self- 
pollinated ears were concerned in the records discussed 
above. The results of these crosses are summarized here. 
Eight non-red ears crossed by plants that were homozy- 
gous for pericarp color yielded 17 red-eared, 116 varie- 
gated-eared and 8 white-eared 8 plants. Similarly, 14 ears 
of pure non-red strains crossed by pollen from plants 
heterozygous for pericarp color yielded 26 red-eared, 192 
variegated-eared and 229 white-eared plants. Consider- 
ing merely the plants with colored ears, 22 crossed ears 
produced 43 red-eared to 308 variegated-eared plants, or 
a little over 12 per cent, self-red. 
Since the male gametes of variegated-eared corn have 
now been shown occasionally to carry a factor for self- 
red, it is obvious that only from crosses of variegated- 
eared plants with pollen from pure non-colored strains, 
can a definite idea of the inheritance of the somatic varia- 
tions in pericarp color be gained. 9 Twelve ears from 
homozygous, variegated plants cross-pollinated by non- 
red strains might have afforded important evidence, but 
for the fact that 7 of them contained only narrow-striped 
grains and the other 5 no fully or even nearly self-red 
grains. The results are summarized here: 
Seeds Planted 
Number of Plants with 
Self-red Ears 
Variegated Ears 
Non-red Ears. 
More than one half red 
5 
11 
0 
Less than one half red 
0 
15 
0 
2 
281 
0 
Non-red 
0 
22 
0 
s Some of the 8 white ears may have been extreme light types of varie- 
gation, for in some other cases very light variegated and wholly white ears 
have been observed on the same plant. And of course some of them may 
have been due to accidental pollination of the parent ear. 
9 Though the genetic factors for pigment patterns in maize seem to be 
distinct from the factors for the pigment concerned in these patterns, no 
non-colored maize that I have used has ever given any indication in crosses 
of carrying pattern factors. 
