FACTORS FOR YIELD AND QUALITY OF SPRING WHEAT 
11 
a wnless segregates, but there were much larger percentages of awnletted 
plants in the Hard Federation X Marquis crosses than in the recipro- 
cal. There is no consistent or significant evidence, therefore, of 
maternal influence affecting the awnedness factors in reciprocal 
crosses of these wheats. 
Table 7. — Segregation in the r F 2 generation into three classes for awnedness" of 
1,050 plants of 12 Marquis X Hard Federation wheats and reciprocal crosses 
grown at Bozeman and Moccasin, Mont., in 1928 
Station, cross, and 
hybrid No. 
Num- 
ber of 
Fj 
fami- 
lies 
Fs plants by awnedness classes 
1 : 15 ratio for 
class 1 to classes 
2 and 3 
3 : 1 ratio for 
classes 1 and 2 
to class 3 
1, awn- 
less 
2, api-« 
cally 
awn- 
letted 
3, awn- 
letted 
Total 
Devia- 
tion 
Prob- 
able 
error 
Devia- 
tion 
Prob- 
able 
error 
BOZEMAN 
MarquisXHard Federation: 
21202B1 
1 
1 
1 
7 
6 
4 
70 
71 
71 
21 
21 
25 
98 
98 
100 
1 

2 
1.62 
~"I.~63~ 
4 
4 

2.89 
21202B2 
2.89 
21202B3. 
Total: 
3 
17 
5.8 
212 
71 fi 
67 
22.6 
296 
100 
96 
97 
100 
2 
2.81 
7 
5.02 
Percentage 
1 
1 
1 


Hard FederationX Marquis: 
21203A1 
9 
7 
R 
71 
77 
83 
16 
13 
12 
3 
1 
1 
1.60 
1.61 
1.63 
8 
11 
13 
2.86 
21203A2 
2.88 
21203A3. 
2.92 
Total: 
: 
3 91 1 921 
41 
14.0 
293 
100 
3 
2.79 
32 
5.00 
Percentage 
7. 2 78. 8 

^39 
Grand total: 
Number 6 
Percentage. _. ' . 
38 
6.5 
443 
75.2 
108 
18.3 
589 
100 
1 
3.96 
7.09 
3 
3 
7 
MOCCASIN 
MarquisXHard Federation: 
21202A1 
1 
1 
1 
3 
2 
57 
54 
49 
17 
15 
26 
81 
72 
77 
2 
2 
3 
1.47 
1.39 
1.43 
2. 63 
21202A2 
2.48 
21202A3 
2. 56 
Total: 
Number. .. . 
3 
12 
5.2 
160 
69.6 
58 
25.2 
230 
100 
2 
2.48 

Hard FederationX Marquis: 
21203C1 
1 
1 
6 
3 
51 
48 
51 
24 
22 
19 
81 
73 
77 
1 
2 
2 
1.47 
1.39 
1.43 
4 
4 

2.63 
21203C2 
2.50 
21203C3 
1 7 
Total: 
Number 
3 
16 150 
6. 9 1 65 
65 
28.1 
231 
100 
2 
l 
2.48 7 
4.44 
Percentage. 
~T 
: 

Grand total: 
Number, 
28 
6. 1 
310 
fi7 2 
123. 
26.7 
461 
100 
1 
3.51 
8 
6.27 
Percentage 
Total (both stations) : 
Number 
12 fifi 
753 
71.7 
231 
22.0 
1,050 
100 

! 32 
J 
9.47 
Percentage. ... 
6.3 
1 1 
Combining classes 1 and 2 and comparing with class 3, the data are 
shown to be close to a 3 : 1 ratio except for two F x families at Boze- 
man. By combining classes 2 and 3 in comparison with 1, the data 
from 12 families at two stations are close to a 15:1 ratio. These 
data indicate the presence of one and two genetic factor differences. 
