92 R. A. EMERSON 
d Dilute Dilute 
Color types Purple Sun re purple oneal Total 
Ia Ila Illa Va 
@Observiedeares re eee 27 19 15 14 75 
Calculated. a, 19 19 19 19 76 
Difterencen see ee +8 | Oo - —-4 —5 —] 
A third purple-anthered purple, an F; plant of the lot regarded as 
equivalent to F.’s, gave in the next generation purple-anthered purples 
and pink-anthered sun reds in the relation 31:7 (group 2, table 39). From 
the genotype A ABB Plplr's’, these two phenotypes should appear 
in a 3:1 ratio. The deviation from expectation was 2.5 + 1.8, or only 
such as might be expected about once in three trials, P equaling 0.34. 
Two green-anthered purples of F2 and two of the equivalent F; lot 
noted above were tested by a later generation. Two of the four yielded 
three color types, purple, sun red, and green, all with green anthers (group 3, 
table 39). Such behavior is expected from the genotype A A Bb Pl 
pl R’ R’. The 9:3:4 relation is approached so closely that the value 
of P cannot be determined from Pearson’s tables, 2? equaling 0.36. The 
comparison follows: 
Color types Purple Sun red Green Total 
Ig Ilg IIlg, IVg 
Observed ree rene 37 aL 14 62 
Calculated: s334-) ek 36 12 16 64 
Ditierences nso. 4a +1 —] —2 —2 
The same two .green-anthered purples were backcrossed with green 
of type IVg, and one of them and a sib of the other with green of type 
VIc, with results as shown in group 3 of table 39. The crosses with type 
IVg, 45 pl R’, gave the same three classes as did the self-pollinations, 
and the frequency distribution differed from expectation by values that 
might occur by chance about once in two trials, P equaling 0.49. The 
comparison follows: 
