May is, 1925 Inheritance of Botanical Characters in Barley 
925 
basis of the breeding behavior of F 3 
lines, the observed frequency fits the 
calculated very well, P being 0.5278 
(Table XII). 
After two years’ experience the 
writer is convinced that it is a simple 
matter to separate rough-awn plants 
from smooth and intermediate-smooth 
awn plants. The breeding test, how¬ 
ever, is the only sure way to separate 
the intermediate-smooth and smooth- 
awn types. 
Table X. 
Although a two-factor explanation is 
given to the results, considerable 
variability exists in the average indices 
of the F 3 lines breeding true for smooth. 
Row 75, for example, with an index of 
3.61 ±0.06 (see Table XI). differs 
markedly from row 63 which has an 
index of 2.85 ±0.05. The difference 
between these two lines is 0.76 ±0.08, 
which is certainly significant in the 
light of its probable error. These 
minor variations suggest the presence 
—Summary of the behavior of F z families from plants classed as interme¬ 
diate-smooth in F 2 ; cross SvanhalsX Lion 
Behavior of lines 
Number of families 
Summation of lines 
segregating 
P. E. 
Calcu¬ 
lated 
Ob¬ 
served 
Breeding true for intermediate-smooth_ 
10 
20 
12 
18 
/558 : 176 observed_ 
| 7.9 
Segregating intermediate-smooth : smooth. 
\551: 183 calculated. 
Seven lines gave rough, intermediate-smooth, and smooth. 
Table XI.— Behavior of F z families from plants classified in F 2 as smooth in 
comparison ivith the Lion parent; cross SvanhalsXLion 
F 2 Plant No. 
1923 
Row 
No. 
Index 
of F 2 
plant 
i 
Frequency for awn index of F$ 
family 
j 
number' Avera se 
plants j awn index 
Standard 
deviation 
2.1 
3.0 
3.9 
4.8 
Lion_ 
1 
6 
25 
12 
43 
3. 13-4-n Ofi 
0 57±0 04 
Do_ _ .. 
9 
21 
8 
| O QS± 07 
60± 05 
Do_ 
4 
31 
5 
1 
41 
j 3. 06± .05 
50dh 04 
Do_ 
11 
l 19 
12 
2 
44 
1 3. 01± .08 
75± 05 
Do.... 
5 
1 31 
9 
45 
3. 08± .05 
50=h . 04 
Do_ 
8 
27 
n 
40 
2 . 93 ± .05 
. 51rb . 04 
Do...__ 
4 
27 
10 
41 
3.13± . 05 
46± 03 
Do_ 
5 
22 
12 
39 
3.16± . 06 
57± 04 
Do__ 
11 
22 
13 
1 
47 
3. 08rb .07 
69zt 05 
Do_ 
-,- 
7 
22 
12 
41 
' 3. 01 ± .06 
. 61± .05 
Do.. .. 
11 
25 
9 
45 
2.96=t . 06 
60± 04 
Do_ ._ .. 
9 
28 
6 
43 
2 94± . 05 
53± 04 
Do_ 
5 
26 
9 
40 
3. 09± . 06 
. 52dt 04 
Do_ 
8 
21 
6 
1 
36 
3. 00± .07 
.64± .05 
115-164...__ 
63 
3.3 
11 
26 
4 
41 
2. 85 ± .05 
. 52± . 04 
115-200_ 
64 
3.3 
9 
23 
39 
2 . 95zb .05 
.48± .04 
139-172__ 
68 
3.3 
8 
25 
11 
44 
3. 06± .06 
.59± .04 
148-162_ _ .. 
70 
2. 5 
11 
22 
n 
38 
2 . 86 ± . 06 
57± 04 
148-163_ 
71 
3.3 
6 
25 
6 
37 
3. 00± .06 
. 51± .04 
139-126_ 
72 
5. 0 
1 
18 
13 
5 
37 
3. 45± . 06 
. 55=b . 04 
115-195_ _ 
75 
3.3 
13 
15 
6 
34 
3. 61± .06 
. 49± . 04 
124-16_ 
76 
4.0 
2 
19 
20 ! 
2 
43 
3. 43± . 06 
. 54± . 04 
130-4_ 
77 
3.3 
0 
31 
7 
40 
3.11± . 04 
. 51zb . 04 
130-36_ 
78 
3.3 
8 
18 
o 
1 
36 
3. 06± . 07 
. 65-b .05 
130-146_ 
79 
4.0 
3 
18 
19 : 
40 
3. 36± .06 
.59± .04 
107-87_ 
140 
3.3 
3 
30 
6 
39 
3. 07=h .05 
. 43zb .03 
107-117_ 
141 
3.3 
4 
20 
12 
1 
37 
3. 24± . 07 
. 62zb . 05 
115-146_ 
142 
4.0 
6 
26 
4 
1 
37 
3. 00± . 06 
. 55=b . 04 
115-156__ 
143 
3.3 
11 
25 
5 
41 
2. 87± .06 
. 55± .04 
124-128_ 
148 
4.0 
4 
26 
16 
46 
3. 23 zb .05 
. 55 ± .04 
130-129__ 
149 
3.3 
0 
18 
15 
2 
37 
3. 41db . 07 
.62rb . 05 
139-35_ 
151 
3.3 
11 
24 
5 
40 
2.86 zb .06 
.55± .04 
148-25_ 
153 
2.8 
8 
26 
s 
1 
43 
3. 04± . 06 
. 61± . 04 
148-29_ 
154 
2.0 
4 
24 
14 
1 
43 
3. 25zb . 06 
.59± . 04 
148 244___ 
155 1 
3.3 
9 
25 
6 
1 
41 
3. 09=b . 05 
. 52± . 04 
115-12_ 
159 j 
3.3 
1 
18 
13 
4 
36 
3. 50± . 07 
. 65=h . 05 
130-187_ 
162 
3.3 
5 
21 
14 
1 
41 
3. 24db . 07 
.63± . 05 
130-166___ 
t 
65 I; 
1 
2.8 
4 
9 
14 
27 
3. 33 zb . 08 
.65rb . 05 
52205—25f-3 
