PLANT Coors In Maize 37 
in the one case and considerably more than an even chance in the other 
case that deviations of the kind noted may have been due to errors of 
‘random sampling. The comparisons follow: 
Color types Purple Sunred Brown Green Total 
Ta IIa V Via 
URC i ate 
Ditierence ys. oe. ao ne = +5 0 
ee { Observed. . .. 54 58 44 53 209 
Calculated... 2h 52 52 52 208 
Difference.... +2 +6 —8s +1 +] 
Seven self-pollinated F. purple plants gave progenies consisting of the 
four color types Ia, IIIa, V, and VIb (group 4, table 8). Here P=0.75, 
indicating that there are three chances in four that such deviations as are 
shown are due to chance. The comparison follows: ° ; 
Color types Purple eae Brown Green Total 
Ta IIIa V VIb 
‘CSCIC li, ee ne ee 318 114 111 42 585 
Walewmlabed anys eae ss 329 110 110 37 586 
«(DINERS yoga eee eon —l1 +4 +] +5 —l] 
Five F. purple plants from self-pollination gave only two color types 
(Ia and IIa) in F; (group 5, table 8). The total number of F; individuals was 
183, of which 139 were of color type Ia and 44 were of color type Ia, 
the expected numbers being, respectively, 137 and 46, and the deviation 
equaling 2+ 4. One of these F, plants was also backcrossed to two greens, 
resulting in 12 purple and 9 sun red F; plants where equality of the two 
classes was expected. The deviation here is 1.5 + 1.5. 
Finally, two self-pollinated F2 purple plants produced 217 F3 individuals 
(group 6, table 8) of color types Ia and IIIa. There were 168 purple 
