416 
Journal of Agricultural Research 
Voi. V, No. 10 
mm. for the plants grown on poles. These ranges do not seem to differ 
significantly from the second-generation ranges. 
The families are arranged according to the means of their long-podded 
•plants. TV-3IO, exceptionally, as was marked in the field, throws short- 
podded plants with pods unusually long in comparison with those of its 
long-podded progeny. Whether this is a genuine exception can only be 
determined by growing further generations from it. This is being done. 
In Table VIII the averages of the short-podded plants in each family 
are compared with the averages of the long-podded plants in the same 
families. If E is completely dominant and none of the minor factors 
show linkage (coupling or repulsion) with E, then the average ratio of the 
pod length of long-podded to short-podded plants should be about 1.5 
in each family. With the exception of the family of LV-310, the ratio 
comes as close to 1.5 as can be expected in small families, averaging 1.52. 
Table; VIII. — Comparison of the length of pods of the short-podded plants in each family 
with those of the long-podded plants in the same families. Third generation. Parents 
heterozygous for E 
Parentage. 
Pod length 
of parent. 
Pod length 
Average of 
short-podded 
plants. 
of progeny. 
Average of 
long-podded 
plants. 
Ratio of 
lengths. 
Difference 
from parent. 
Mm. 
Mm. 
Mm. 
Ly-113. 
79 
51-2 
80. 3 
i* 57 
+ I 
LV-279. 
88 
57*3 
81. I 
1.42 
“ 7 
VL-292. 
88 
53 *o 
83.8 
1. 58 
- 4 
vL-133. 
86 
60. 2 
87.8 
1. 46 
+ 2 
LV-461. 
94 
56.0 
89.6 
1. 60 
- 6 
Lv-468. 
92 
5 8 -4 
89.7 
i* 54 
— 2 
VI^i7i. 
101 
59 - 8 
90*5 
i* 5 i 
— 10 
VI/-88. 
103 
65. 8 
93*3 
1. 42 
— 10 
LV-310. 
95 
71. O 
95*4 
i* 34 
0 
LV-80. 
9 i 
60. 3 
95*5 
1. 58 
- 5 
Lv-486. 
100 
61. 1 
96. 2 
1. 58 
- 4 
LV-527. 
95 
62.6 
96.4 
1. 54 
+ 1 
LV-114. 
98 
62. 5 
99*3 
i* 59 
4 - 1 
VT/-509 a . 
93 
65.8 
101. 6 
i* 55 
a+ 9 
VI^-164. 
98 
65. 0 
102. 7 
1. 58 
+ 5 
vir-85 . 
106 
71. 0 
103.5 
1. 46 
— 2 
Average. 
1-52 
— 2 
i 
a Part of this family was grown on poles. 
If the minor factors show zero dominance, the average of the long- 
podded progeny in each family should equal the parental average, the 
theoretical excess here being negligible. On the whole, the long-podded 
plants average 2 mm. shorter than their parents. This is in part due 
to the stunting in the elimination field, and also possibly to the severe 
drought in 1913. In both cases the third-generation families were 
