88 R. A. EMERSON 
' Dilute Dilute 
Color types Purple Sun.red suiaal itn EOE Brown Green 
la Ila Hla IVa Wp VI 
Observed: 2.2). 36 29 Bill al ols Ne 
Calculated 4e = 31 6° 3126") SEG 31.6 23 o ote 
Difference. ..... +4.4 —2.6 —0.6 —0.6 —0.6 +0.1 
If an F, supposedly AaBbFilpl Rr’, be backcrossed to 
sun red, type IVa, A b plr’, color types Ia, Ila, Illa, and IVa should 
appear, none of them with green anthers. Such crosses are presented in 
group 3 of table 37. The anthers thruout were purple or pink, and the 
several color types appeared in approximately equal numbers, as expected, 
there being more than two chances in five that the observed deviations 
may have been due to errors of random sampling, P equaling 0.42. Th 
comparison follows: : 
Dilute Dilute 
~ Color types Purple Sun red purple sun red Total 
la Ila Itla IVa 
@bservied 25 soi eee 1S 97 95 total A418 
Calculateden ee 104.5 104.5 104.5 10425 418 
Ditherencenr es see +10.5 —7.5 —9.5 +6.5 0 
If the same F, genotype, AaBb Pl pl R’r", be backcrossed with 
green of type [Vg, A b pl R’, there should occur five major color types, 
brown not appearing, and both green and colored anthers should be 
found in both the purple and the sun red plants. The records of such 
a cross are given in group 4 of table 37. The seven expected color types 
occurred in numbers near enough to expectation so that there are nearly three 
chances in ten that the deviations may have been due to errors of random 
sampling, P equaling 0.29. The most pronounced deviations are the excess 
of dilute sun reds and the deficiency of greens. The comparison follows: 
Plant color Purple Purple Sunred Sun red Dilute Dilute Green Tota! 
purple sun red 
Anther color Purple Green Pink Green Purple Pink Green 
Ta Ig Ila Ilg Illa IVa IIIg, 1Vg 
Observede eer were 10 13 U Sie all) 15 13 
@alculatedheessee cee 9.5 9.5 9.5 9.5 9.5 9.5 19 
Dinerencesi aoe eee ee +0.5 +3. —2.5 —1.5 40.5 +5.5 —6 
