FACTORS FOR YIELD AND QUALITY OF SPRING WHEAT 
53 
Table 48. — Crude-protein content of grain from individual F 3 plants of low and 
high protein strains of Marquis-Hard Federation wheat crosses, in comparison 
with the parents, grown at Bozeman and Havre, Mont., in 192 '4 
Bozeman strain and row Nos. 
Havre strain and row Nos. 
■Crude - protein 
content (N 
X5.7, 13.5 per 
cent moisture) 
Low protein 
High protein 
Low protein 
High protein 
Al- 
24: 
8' 
B3- 
84; 
145 
Hard 
Fed- 
era- 
tion; 
20 
Bl- 
24; 
38 
Bl- 
65; 
113 
Mar- 
quis; 
229 
Bl- 
65; 
203 
B3- 
84; 
229 
Hard 
Fed- 
era- 
tion; 
300 
Bl- 
78; 
26 
B2- 
100; 
47 
Mar- 
quis; 
10 
8.5 per cent 
2 
2 
6 
7 
3 
1 
4 
2 
9 
1 
7 
2 
2 
1 
2 
■9 per cent . 
2 
2 
1 
1 
10 
10 per cent 
3 
1 
11.5 per cent. J 6 
3 
4 
3 
2 
3 
4 
3 
1 
3 
:::::::::: 
2 
2 
i 
12.5 per cent J 6 
1 
2 
3 
2 
3 
5 
10 
15 
6 
4 
1 
1 
4 
7 
...... 
-- 
5 
11 
5 
7 
1 
1 
1 
1 
2 
2 
2 
7 
4 
10 
3 
2 2 
14 per cent .. 
1 
2 
5 
9 
8 
4 
2 
1 
1 
1 
5 8 
7 
10 
2 
2 
10 
12 
1 
1 
1 
1 
16 per cent.. 
1 
5 
3 
6 
3 
2 
2 
8 
12 
9 
5 
1 
1 
1 
16.5 per cent 
3 
17 per cent ._ _. 
1 
3 
5 
1 
3 ! 1 
16 
18 per cent - 
I 
11 
! i | 
" S " 
2 
! • i 
1 
'< 
Total 
Average 
per cent - 
39 | 51 
12.2 11.7 
44 ! 50 35 
12.8 15.2 16.0 
35 
16.5 
37 34 
14.4 14.7 
46 
14.9 
20 
17.3 
38 
17.2 
38 
17.5 
The data show that the strains of low crude-protein content are 
more variable than those of high crude-protein content. Strain 
B3-84 was the strain of lowest crude-protein content at Bozeman 
and second at Havre. At Bozeman it averaged significantly lower 
than Hard Federation, but not at Havre. The parent plant of this 
strain in the F 2 generation was one of the lowest in crude-protein 
content, with 13.7 per cent. Strains Al-24 at Bozeman and Bl-65 
at Havre, other F 3 families low in crude protein, were practically 
the same as Hard Federation. The F 2 parents of these strains were 
both medium in crude-protein content among the 567 plants studied 
for crude protein in this generation. 
The three F 3 strains of high crude protein, Bl-78, Bl-65, and 
B2-100, are progeny of F 2 plants which had 16.7, 14.7, and 14.2 
per cent crude protein, respectively. The average crude-protein 
content of Marquis was 14.9 per cent and of Hard Federation 1*4 
per cent. In the F 3 generation at Bozeman strain Bl-65 was highest 
in crude protein, with 16 per cent, whereas it was the lowest at 
Havre, with 14.4 per cent. This indicates the important part played 
by environment in determining quality factors. At Havre strains 
Bl-78 and B2-100 were highest in crude protein, but neither exceeded, 
although they practically equaled, Marquis. 
The F 2 parent plant of strain Bl-24 was the highest in that gener- 
ation, with a crude-protein content of 18.1 per cent, but the progeny 
in F 3 did not rank highest at either Bozeman or Havre. Data for 
this strain from Bozeman included in Table 49 show that it averaged 
15.2 per cent crude protein, which was fairly high for that station. 
