PLANT Cotors IN Maize 93 
Color types Purple Sunred Green Total 
Ig Ilg Illg, [Vg 
BeseIViCd ee eases... el 34 32 53 119 
| SLIGUIEW He I Ae ene 30 30 60 120 
Difference..........0005- +4 +2 ff —1 
|The backcrosses of these green-anthered purples with green of type VIc, 
‘ab plr’, as was to be expected, gave very different results. There were 
) produced four instead of three phenotypes, all with colored (purple or 
/pink) instead of green anthers. The deviations from the theoretical 
/frequency distribution are such as might be expected about once in five 
trials, P equaling 0.21. The comparison follows: 
Dilute Dilute 
| Color types Purple Sun red purple sun red Total 
| la IIa Illa IVa 
MDServied oe eer. es... 44 48 33 52 177 
| Calculated oi Ace 3h rire 44 44 44 44 176 
Difference «6 bik ee 0 +4 ——1] +8 +1] 
The other two green-anthered purples that were tested yielded only 
‘two phenotypes, green-anthered purple and green, in the relation 56:18 
‘(group 4, table 39). The genotype A A.Bb Pl PIR’ R’ should give 
these two phenotypes in a 3:1 ratio. The deviation from expectation 
was therefore 0.5 + 2.5. One of the same plants backcrossed to green 
of type [Vg gave 28 green-anthered purples and 27 greens where equality 
was expected. . 
Of the twelve kinds of behavior expected of F2 purples of the cross of 
purple-anthered purple with green IVg, only four have been demonstrated. 
So far as they go, however, the results are quite in accord with the hypoth- 
esis under test. In addition to the F: purples, sun reds and dilute 
purples also were tested by later generations, as detailed below. 
Three pink-anthered sun reds gave sun reds and dilute sun reds only, 
all with pink anthers (table 40, group 1). These three plants are therefore 
Tegarded as AA Bboplpir'r’. The ratio observed was 97:26. The 
‘deviation from the expected 3:1 ratio was 4.75 + 3.24, or such as might 
