A BRACHYTIC VARIATION IN MAIZE. 
15 
ing the 3 to 1 monohybrid ratio. The actual number was 234 nor- 
mal and 74 brachytic, the percentage of the recessive class being 
24.0 ± 1.7. The measurements of these second-generation plants 
also are given in Table III. 
Table III. — Measurements of maize plants of the first and second venerations 
of the brachytic X Boone hybrid. 
[The ears had dark and pale colored seeds, and the number 11 following the progeny designation indicates 
that the color of the seed planted was dilute. Figures in the last two columns in black-face type 
indicate the characters in which the brachytic plants exceeded the plants of normal stature.] 
First generation. 
Second generation. 
Character. 
Dh435. 
Dh 435- 
11. 
Dh 436. 
Dh 430- 
11. 
Normal. 
Bra- 
chytic. 
DifTer- 
encc. 
Dif- 
fer- 
ence 
prob- 
able 
error. 
Height of plant , 
decimeters 
Height of upper ear from 
the ground. decimeters. 
Length of branching 
space centimeters. . 
Length of central spike, 
27. 2± 0.25 
13. 0± 0.25 
19. 5 ±0.27 
32. 0± 0.67 
29.1 ±0.50 
37. 8± 1.24 
103.5±0.57 
9.9±0.15 
16. 8± 0.34 
9.9±0.29 
16.9±0.29 
26. 8± 0.36 
12. 4 ±0.28 
19.0±0.37 
30. 0± 0.50 
27. 0± 0.46 
34. 0± 1.21 
91.5±1.24 
9. 1±0.15 
18. 2± 0.13 
7.7±0.18 
13.8±0.39 
26. 0± 0.22 
12.3±0.19 
18. 2± 0.34 
30. 7 ±0.61 
27.7±0.51 
29. 3± 1.33 
86. 5 ±0.87 
8.7±0.12 
17.8±0.29 
7.4±0.21 
13.1±0.18 
26.1 ±0.37 
11.7±0.26 
17.1 ±0.54 
32.7±0.71 
28. 2± 0.40 
24. 2± 1.34 
85. 8± 1.28 
8.9±0.12 
17.5±0.16 
7.3±0.15 
13.1±0.31 
29. 7± 0.19 
12.0±0. 12 
15.1±0.16 
30.0 ±0.28 
24.3±0.43 
31.7±0.46 
95. 2± 0.42 
8.9±0.06 
16.8±0.12 
7.5±0.09 
14.2±0.12 
1.25±0.02 
16. 2 ±0.20 
20. 7 ±0.40 
18.2±0.12 
5. 5 ±0.30 
4.9±0.03 
21.7±0.09 
7.3±0.07 
10.4±0.12 
3.9±0.06 
12. 2± 0.22 
30. 7 ±0.56 
24. 4± 0.29 
36. 4± 0.72 
90. 2± 0.62 
8.9±0.07 
5.4±0.12 
7.1±0.18 
16.0±0.23 
1.5±0.05 
14.0±0.21 
20. 6± 0.57 
17.0±0.13 
4.8±0.40 
4.8±0.04 
22.3±0. 12 
8. 5 ±0.05 
19.3±0.17 
8.1 ±0.13 
2.9±0.27 
0.7±0.63 
0.1±0.48 
4.7±0.77 
5.0±0.75 
0.0±0.09 
11.4±0.17 
0.4 ±0.20 
1.8±0.26 
0.25±0.05 
0.22±0.29 
0.1±0.7 
1.2±0.17 
0.7 ±0.55 
0.1 ±0.05 
0.6±0.15 
1.2±0.08 
114.0 
62.2 
10.7 
1.1 
Length of longest tassel 
branch. . .centimeters. . 
Number of tassel branches. 
Longest leaf: 
Length, centimeters. . 
Width do.... 
Length of longest inter- 
node centimeters. . 
Number of internodes 
.2 
6.7 
6.7 

67.0 
2.0 
Diameter of stalk, ^inch. 
6.95 
4.6 
Ear length: 
Upper ear, centi- 
meters 
Total . . . centimeters. . 
Number of rows on upper 
ear 
Length of staminate 
spike on upper ear, 
23.2±0.53 
26. 8± 1.25 
18.2±0.11 
21.4±0.55 
22. 2± 0.54 
16.6±0.24 
18.8±0.41 
22. 2 ±0.90 
17.7±0.11 
20. 2± 0.38 
24. 3 ±0.94 
16.2±0.11 
.76 
.1 
7.13 
1.3 
Number of leaves: 
Above the upper ear. 
Total 
Number of nodes: 
5.7±0.09 
22. 3 ±0.20 
7.5±0.14 
14. 7 ±0.25 
5.2±0.08 
20. 3 ±0.25 
5.0±0.06 
21.0±0.21 
5.0±0.08 
21.9±0.75 
2.0 
4.0 
15.5 
14. 4± 0.22 
22. 6 ±0.25 
12. 4 ±0.42 
10.2±0.56 
14.1±0. 14 
20.9±0.20 
12. 0± 0.27 
9.6±0.40 
13.6±0.17 
20.0 ±0.43 
11.4±0.24 
9. 5 ±0.70 
Length of longest leaf 
sheath centimeters. . 
Number of leaf sheaths 
above longest 
Length of upper ear 
stalk centimeters. . 
23.6±0.29 
13. 0± 0.27 
12.7±0.46 
22. 7 ±0.13 
11.3±0.09 
8.7±0.23 
22. 4 ±0.19 
11.6±0.14 
7.4±0.23 
0.3±0.2 
0.3±0.16 
1.3±0.31 
1.5 
1.8 
4.2 
While no difficulty was encountered in classifying the plants as to 
stature, a closer examination showed that several plants, classed as 
normal, in reality had one or more shortened internodes. The actual 
number was 14 plants Avith one or two shortened internodes in a 
population of 130 otherwise normal plants. These brachytic inter- 
nodes were located either near the base or near the top of the plant. 
(Pis. IX and X.) Such plants may be heterozygous for the bra- 
