PLANT Coors In MAIzEe 43 
Dilute Dilute C 
purple sunred ~ 
Illa IVa Vib, ¢ 
Color types reen Total 
Olosarvecl. - . 25 2s eee ae 95 Si 50 176 
Caleullaieel, 2 oS eae see eerie ne 99 33 44 176 
IDMRIGTRNINGO S = ec a ee —4 —2 +6 0 
One of the dilute purple F, plants used in this test was backcrossed 
with green VIc (group 1, table 11), with the result shown below. There 
is practically an even chance that the observed deviations may be due to 
errors of random sampling, P equaling 0.49. The comparison follows: 
Dilute Dilute 
Color types acimile gum nad Green Total 
Illa IVa Vib, ¢ 
Closeieredls. cic sake eee eee 21 25 57 103 
CGAlculavedeere ts oct. ee ce ek 26 26 52 104 
IDMHCTONGE 5 oe. BAER ee ee —5 —] +5 —] 
One F, dilute purple gave 57 dilute purple and 21 dilute sun red plants 
in F; (group 2, table 11). The expected numbers were 58.5 and 19.5, 
respectively, the deviation being 1.5 + 2.6. 
Three F, dilute purples gave a total of 85 dilute purple and 20 green 
plants (group 3, table 11), the theoretical numbers being 79 and 26, 
respectively. The deviation from expectation, 6 plants, is just twice the 
probable error. 
One F, dilute purple bred true in F3, producing 21 dilute purple plants 
and no other types (group 4, table 11). Thus, all the sorts of behavior 
expected of F, dilute purples were realized in F3.. The distribution of 
the F, plants with respect to the four sorts of behavior was 1:1:3:4, 
instead of the theoretical distribution 1:2:2:4. Differences of this sort 
might be expected thru chance in four out of five trials, P equaling 0.80. 
Only three plants of these lots were tested in Fy. One was a dilute sun 
red of the lot made up of dilute purples and dilute sun reds, and this one 
bred ‘true in F; as was expected of it, producing 34 dilute sun red plants. 
The other two plants tested further were dilute purples of the lot contain- 
ing the three color types III, IV, and VI. Both again gave these three 
