PLANT COLORS IN Maze 57 
Some of the F; purple plants were crossed back to dilute sun red, with 
results as given in group 2 of table 29 and summarized below. The 
seventeen progenies together approached the expected equality of the 
four. color types so closely that the observed deviations might be expected 
thru chance more than twice in five trials, P equaling 0.44. 
Dilute Dilute 
Color types Purple Sun red nitadle avis Total 
Ta Ila IIIa IVa 
WOsenvedis es eo ess 323 306 320 289 1 243 
PP emlaueds sa tian bse 311 dll dll 311 1 ,244 
DM SRSGS i oe ee +12 = Sd =. 
Sixteen F, purple plants were tested by their F3; progenies (table 30). 
Seven F; purples (group 1) gave again the four color types purple, sun 
red, dilute purple, and dilute sun red, the several classes being represented 
by 268, 105, 78, and 28 individuals, respectively, while the calculated 
numbers were 269, 90, 90, and 30. The odds against such deviations 
being due to chance are about three to one, P equaling 0.24. One of the 
seven F, purple plants was crossed with green aabb pl pl and gave the 
same four classes of progeny, represented by 26, 25, 24, and 21 plants, 
respectively. Evidently these F: purples were like the F;’s, AA Bb Pl pl. 
Four other F, purples (group 2, table 30) gave only purple and sun 
red progenies. Three of these when selfed gave 60 purple and 22 sun red. 
Two of these three and one other, when backcrossed with dilute sun red 
or green, gave 32 purples and 31 sun reds. The four F,’s are therefore 
regarded asA A BB PI pl. 
Five F, purples (group 3) gave purples and dilute purples only. Four 
of these, which were selfed, gave 162 purples and 48 dilute purples, while 
the fifth, which was backcressed to dilute sun red, gave 17 purples 
and 15 dilute purples. These five F.2’s are consequently regarded as 
AABb Pl Pl. 
None of the sixteen F, purples tested bred true in F;, A A BB Pl Pl. 
A single F; purple (group 6), however, which occurred in the F; lot showing 
the four color types (group 1) and which was therefore comparable to 
the F, purples, bred true in Fy, producing 69 purples on being selfed and 
18 on being backcrossed to green. Of three other F; purples of the same 
