PLantT Coors In Maize 87 
as a demonstration of the hypothesis suggested to account for the Fe 
behavior of the cross of brown, type V, with green, type IVg. It is note- 
worthy, however, that no results have been found that do not agree with 
the hypothesis. Fortunately, several intercrosses of the types found in 
F, afford additional evidence. 
Purple Ig x green VIc.— Green-anthered purples, A B Pl R’, crossed 
with greens of type VIc, ab plr’, should give Fy, results identical with 
those found from the original cross of brown, a B Plr’, with green of 
type IVg, A b pl R’, since F; in either case should be AaB b PI pl R’7’. 
Two such crosses are recorded in table 37, group 1 (page 146). The F, 
plants were both purple, with purple anthers. In F.2 the same eight 
types were noted as in F» of the cross of brown with green IVg (table 36). 
The anther color was not recorded, however, for many of the plants, 
so that only six color classes are shown, as in table 35. While all the 
expected color types are present, the fit of observed to calculated numbers 
is so poor that the observed deviations should not occur by chance more 
than once in thirty trials, P equaling 0.033. The comparison follows: 
Dilute Dilute Brown Green Total 
purple sun red 
laces eta or Tian. Ve Ve clic. al VieenVil 
Observed.... 80 13 ao 9 20 Zi 158 
Calculated... 66 22 We 6 22 25 158 
Color types Purple Sun red 
Difference... +14 —9 —8 +3 —2 +2 0 
If, notwithstanding the poor fit shown above, the F; was AaBb Pl 
pl R’r’, a backcross of F; with green of type VIc, a6 pl7’, should result 
in the same six major plant-color types, but no green-anthered purples 
or sun reds should occur. Such crosses are listed in group 2 of table 37. 
All the purple plants had purple anthers and all the sun red plants 
had pink anthers. Moreover, the six color classes appeared in so very 
hearly the expected relation of 1:1:1:1:1:3 that deviations as great as 
those observed might be expected to occur by chance perhaps ninety-nine 
times in one hundred trials, ~ equaling 0.85 (when x?=1 and n’=6, 
P=0.96). The comparison follows: 
