Feb. 23, 1924 
Teosinte Maize Hybrids 
587 
Table VIII .—Biometrical constants for the second generation of the hrachytic X teosinte 
hybrid —Continued 
Character. 
Entire population. 
Brachytic group*. 
Normal group. 
Difference. 
Fig. 
num¬ 
ber 
of fre¬ 
quen¬ 
cy 
poly¬ 
gon. 
Mean. 
b 
fcj 
Ai 
Mean. j 
b 
W 
fU 
Mean. 
; 
b 
W 
pi 
Amount. 
Hi 
Amount. 
w 
ni 
Rows in terminal 
spike of best in¬ 
florescence. 
2. 61 
O. 92 
0. 040 
3 -03 
I. OO 
0. 121 
2. 55 
O. 90 
0. 041 
—0.48 
0.128 
3 
■ 75 
94 
Position of best spike 
2.69 
. 62 
. 027 
2 .39 
.83 
. IOO 
2. 74 
• 55 
♦ 025 
• 35 
• 103 
3 
.40 
95 
Eength of best spike.. 
6.85 
I -51 
.065 
7 - 45 
I. 50 
. 182 
6. 76 
1. 52 
. 070 
—.69 
. 195 
3 
54 
96 
Number rows of ali¬ 
coles on best spike.. 
2.36 
. 72 
. 031 
2. 77 
•94 
. 114 
2. 30 
.67 
.031 
—• 47 
. 119 
3 - 95 
97 
Number of double 9 
alicoles on best 
spike... 
8. 76 
II. 78 
. 506 
20. 13 
11. 90 
I. 440 
7. 14 
10. 80 
. 497 
—12.99 
1.524 
8. C2 
98 
Number of single 9 
“ “rl” 
alicoles on best 
spike. 
10.99 
7. 78 
• 334 
6.13 
11. 06 
I- 338 
11. 68 
6.94 
• 319 
5-55 
1.375 
4.04 
IOO 
Number of spikes in 
prophyllum,. 
2.16 
I. 09 
.047 
1. 52 
•91 
. no 
2. 25 
I. 10 
.051 
• 73 
1.106 
,66 
99 
Alicole index. 
64.47 
38. 24 
1.644 
24.32 
30. 10 
3.640 
70.17 
35 - 78 
1.646 
45 - 85 
3.998 
11 .47 
xox 
Days to pollen. 
126. 85 
12. 96 
♦ 544 
125. 06 
12. 97 
r -543 
127.13 
12.93 
•595 
2. 07 
• 654 
3 - 
16 
102 
Days to silk. 
132 .43 
13- 62 
♦ 572 
130. 50 
13 . 58 
1. 616 
132. 71 
13 - 58 
• 625 
2. 21 
!• 733 
X. 
28 
103 
Days pollen to silk.. . 
5 - 52 
3.01 
. 126 
5 - 44 
2. 74 
. 326 
5 - 53 
3.05 
. 140 
.09 
•354 
25 
104 
Average length of in- 
temodes. 
4.40 
3 - 07 
. 132 
3-68 
i- 73 
. 209 
4.50 
3- 20 
. 147 
. 820 
. 256 
3 . 
20 
105 
Rank of pistillate in¬ 
florescence. . 
4.48 
1. 67 
. 072 
6. 00 
.88 
. 106 
4. 26 
1.63 
.075 
-1. 74 
1.634 
X. 
07 
106 
Table IX. — Biserial correlations of brachytic culms with the characters named a 
Character. 
Correlation. 
Height. 
Alicole index. . 
Diameter of stalk. 
Number of double ? alicoles. 
Rank of pistillate inflorescence. 
Total sucker height. 
Number of suckers. 
Number of single 9 alicoles. 
Number of spikes in prophyllary. 
Rows of alicoles on best spike. 
Leaves on best inflorescence. 
Length of 9 portion of best spike. 
Position of best spike. 
Rows in terminal spike of best inflorescence. 
Central spike index. 
Length of best spike. 
Length of ear stalk best inflorescence. 
Length of best inflorescence. 
Average length of internodes on best inflorescence 
Leaves above branch.. 
Total number of leaves. 
Number of tassel branches. 
Number of branches on best inflorescence. 
Days to pollen. 
Days to silk. 
Branching space. 
Central spike. 
Length of longest tassel branch. 
Leaves above best inflorescence.. 
Days pollen to silk. 
-0.95i0.03 
- .63 d: .05 
.62 i .05 
• 5 »± -°5 
• 5 6 ± .06 
- - 55 ± -05 
- -4°i .05 
- -37± 06 
- - 35 ± -07 
• 34 ± .07 
- -34± -06 
• 3 i± «°7 
- .29± .07 
.28± .07 
- .25± .07 
.24± .07 
- •23 zb .07 
- .I9± .07 
.I 4 ± .07 
- .12 zb .07 
.II± .07 
.II± .07 
- .io± .07 
- .09± .07 
- . 09 zb .07 
.o8± .07 
- . 08 zb .07 
.07 zb .07 
- .05 zb .07 
- ,02 zb .07 
« Correlations in excess ot o. *2 are greater than three times the error. 
