3i8 
Journal of Agricultural Research 
Vol. XXV, No. 7 
physiological cause. Thus, crosses between short plants with broad 
leaves and tall plants with narrow leaves usually show in the F 2 a corre¬ 
lation between tall plants and wide leaves—a correlation easily under¬ 
stood. Some such explanation may apply in other cases of disherence 
where the physiological relationships are not indicated so clearly, but 
are working at cross purposes with genetic relationships. The corre¬ 
lation coefficients are given in Table VII and the biometrical constants 
in Table VIII. 
Table VIII.— Biometrical constants for plants with liguleless and normal leaves in the 
three stature groups , normal , hrachy tic , and dwarf 
NORMAL STATURE 
Normal leaves. 
Liguleless leaves. 
Difference. 
D/E. 
Mean. 
a 
PE. 
Mean. 
<r 
PE. 
Height. 
23. II 
3.81 
0. 13 
23 - 77 
4 - 54 
0. 25 
-)-o. 66±o. 29 
2-3 
Length fifth leaf. 
77. IO 
9-85 
•34 
76. 80 
10. 83 
.63 
-• 3 °± • 7 2 
• 4 
Width fifth leaf.. 
Number tassel 
IO. 19 
i- 95 
•13 
9. 07 
1. 76 
. 10 
— 1.12 ± .16 
7.0 
branches. 
Total number 
20. 62 
10. 29 
•33 
II. 80 
8.14 
•45 
—8. 82 i .56 
15*7 
leaves. 
22. 52 
i- 57 
. 10 
22. 28 
1. 54 
. 11 
24 ± .15 
1. 6 
Leaf index_:.. 
12. 47 
2.11 
•15 
II. 48 
4. 91 
.29 
-• 99 ± *33 
3 *o 
BRACHYTIC STATURE 
Height. 
8. 21 
1. 92 
0.11 
8.31 
2. 66 
0. 25 
+0. io±o. 27 
0.4 
Length fifth leaf. 
72. 23 
10. 04 
.67 
61. 30 
14- 3° 
1. 97 
— 10. 93 ±2. 08 
5-3 
Width fifth leaf.. 
9. 42 
2.14 
• 14 
8. 24 
2.12 
.29 
— 1. i8db . 32 
3. 68 
Number tassel 
branches. 
23.08 
10.10 
.66 
10.94 
9- 95 
i-35 
— 12. I4±i. 50 
8.10 
Total number 
leaves. 
24-95 
2. 04 
. 18 
25-35 
1. 89 
•3i 
+. 40dt .36 
1.11 
Leaf index. 
14. 26 
5- 92 
.40 
13.29 
5-96 
.82 
-•97± *9i 
1. 06 
DWARF STATURE 
Height. 
4. 80 
0. 98 
0. 06 
5 - H 
I. 03 
0.12 
+0.34 ±0.13 
2. 60 
Length fifth leaf. 
45 - 93 
6. 17 
•36 
38.40 
7. 68 
.91 
-6. 53± .98 
6. 66 
Width fifth leaf.. 
Number tassel 
n* 39 
2. 22. 
•13 
10.19 
1. 83 
. 22 
— I. 20± . 26 
4. 60 
branches. 
Total number 
.8 
i -35 
. 08 
.19 
• 59 
.07 
—. 6i± . 11 
5 - 54 
leaves. 
24. 52 
2. 18 
•34 
25- 5 ° 
1. 66 
•56 
+. 98 ± .65 
1* 5 2 
Leaf index. 
25- 47 
3 - 73 
. 22 
23.88 
•43 
•43 
-1. 59± .48 
3 - 38 
There seems to be no association between perfect flowered ears and 
liguleless leaves. The fourfold distribution for these characters is: 
Normal leaves. 
Liguleless leaves. 
Total. 
Pistillate 
ears. 
Perfect 
flowered 
ears. 
Pistillate 
ears. 
Perfect 
flowered 
ears. 
451 
158 
160 
40 
809 
