PLuant Coors IN Maize 99 
of the colored seeds are mottled, the 9:3:4 relation of plant-color types 
observed in this cross should be made up of a 3:1:0 relation from color- 
less seeds, 3:1:0 from mottled seeds, and 3:1:4 from self-colored seeds. 
Of the progenies for which the seeds were sorted in this way, the color- 
less seeds produced dilute purple and dilute sun red plants in the relation 
60:14, with a deviation from 3:1 of 4.5 + 2.5, the mottled seeds gave the 
same plant-color types in the relation 30:12, with a deviation of 1.5 + 1.9, 
and the self-colored seeds yielded dilute purple, dilute sun red, and green 
in the relation 48:19:64 (the theoretical distribution for a total of 131 
‘Individuals is 49:16:66), the deviations being such as might occur by 
chance perhaps three times in four trials, x? equaling 0.64. On the whole, 
| therefore, these crosses, and particularly the interrelations of aleurone and 
plant colors, afford strong evidence in support of the hypothesis under test. 
Before presenting further F; results from these crosses, it may be well 
to consider other crosses of dilute purple with green IVg which, so far as 
plant color alone is concerned, have given results quite like those pre- 
sented above but which exhibit a wholly different relation between plant 
color and aleurone color. The green plants concerned in these other 
crosses were C testers for aleurone color (Emerson, 1918), and were there- 
‘fore known to be Ac R, presumably Ack’. The dilute purple plants 
concerned were homozygous for aleurone color, and were consequently 
ACR, presumably Ach’. These crosses differ, then, from the ones 
discussed above in having R’ in place of r” and c in place of C. Since the 
Cc pair is supposed not to have any relation to plant color, the results for 
plant color should be quite like those for the other cross and there should 
be no relation between plant color and aleurone color. The results for 
F, are presented in table 42, group 2, and the F; results in table 43, 
group 1B. The three plant-color types appeared in F2 in the relation 
328:113:148, and in F; in the relation 40:14:23. Considered together 
these lots deviated very slightly from expectation, x? equaling 0.31. The 
comparison follows: 
Dilute Dilute 
Color types purple sun red Cuces ees 
Ia Iva Illg, IVg 
Ste Le re eee 368 127 171 666 
Calculated...... CSR aoe 375 125 166 666 
PIETCMC Cr cc. se ee « * =i ag pat 0 
