June 9, 1923 
Rogue Types in Garden Peas 
833 
With the exception of one plant (9.p7-6), the hybrids were all classified 
as rogues at maturity. Plate 3, B, is of the upper part of a branch of a 
mature plant from Mumm}^ x Gradus rogue. 
The exceptional plant (9.727-6) resembled the of Mummy X Gradus, 
although 7 other plants from the same cross had rogue stipules. The 
atypical F^ hybrid (9.727-6) produced 61 F2 plants in 1920 (Culture 
No. 0.1084). At the time the notes were taken 14 individuals were too 
dried to classify. Of the 47 remaining plants, 23 were grouped as inter¬ 
mediates, with stipules intermediate in shape between those of Mummy 
and those of Gradus, and 24 were classed as Graduslike types. Appar¬ 
ently there were no rogues among the Fj offspring. 
Besides the Fj family (0.1084) derived from the atypical F^ plant, 
five other Fj cultures were classified by inspection as rogues and non¬ 
rogues, the latter being subdivided into broads and intermediates 
(Tables XIII and XIV). The number of individuals in each of the 
three categories is shown in Table XIV. The ratio of rogues to non¬ 
rogues indicates a single factor difference between the two parents as 
being primarily responsible for the difference in stipule shape. The 
observed ratio of 77.12 per cent rogues to 22.88 per cent nonrogues 
agrees with that theoretically expected being within the error due to 
the limitations of random sampling. 
On the assumption of a single factor pair, X and x', primarily respon¬ 
sible for a difference in mean stipule ratio of 2.05 in Mummy and as 
compared with 2.35 in Gradus rogue, one would expect the Fg to segre¬ 
gate only into rogues and Mummylike plants. Actually three classes 
based on stipule shape were distinguished, namely, rogues, intermediates 
(Mummylike), and broads (Table XIV), the latter having stipules com¬ 
parable to those of Gradus. 
Table XIII .—Classijication into rogues and nonrogues of five Fj families from the 
cross Gradus rogueXMummy 
Parent. 
Culture No. 
Rogues. 
Nonrogues. 
Unclassi¬ 
fied. 
Total. 
Interme¬ 
diate. 
Broad. 
1919: 
1920: 
9*726-5. 
0.1076. 
79 
19 
3 
8 
109 
9.726-6. 
0.1077. 
68 
IS 
2 
I 
86 
9-726-7 . 
0.1078. 
8 
4 
2 
2 
16 
9.726-8.1 
0.1079. 
II 
4 
0 
4 
19 
9.727-8.! 
0.1085. 
16 
4 
I 
6 
27 
1 
1 
182 
46 
8 
21 
2S7 
