FACTORS FOR YIELD AND QUALITY OF SPRING WHEAT 
63 
the ripening period, the environmental effect, due possibly to wide 
differences in the balance between soil moisture and available nitrates 
at the three stations. 
Table 58. — Correlation between fruiting period and yield in F% plants of Marquis- 
Hard Federation wheat crosses grown at Bozeman, Mont., in 1923 
Fruiting 
Yield 
per plant (grams) 
period 
0.5 
1.5 
2.5 
3.5 
4.5 
5.5 
6.5 
7.5 
8.5 
9.5 
10.5 
11.5 
12.5 
Total 
36 days 
1 
2 
1 
38 days 
1 
1 
2 
2 
5 
9 
4 
6 
5 
2 
1 
7 
10 
12 
8 
8 
7 
1 
...... 
27 
21 
17 
22 
9 
1 
1 
8 
20 
20 
32 
36 
17 
4 
..... 
14 
15 
26 
22 
17 
9 
2 
2 
5 
9 
22 
12 
13 
3 
9 
32 
42 days . . 
1 
3 
4 
9 
12 
15 
2 
1 
1 
3 
2 
6 
2 
1 
92 
44 days ... 
88 
46 days ... 
1 
1 
2 
2 
124 
48 days . 
2 
2 
1 
..... 
128 
50 days 
86 
52 days _ 
22 
1 
Total... . 
1 
4 
9 
33 
54 
102 
138 
107 
68 
46 
15 
4 
2 
583 
r=0.324±0.025. 
HEIGHT 
The coefficients of correlation obtained for height one year with 
another at both Bozeman and Moccasin and at Bozeman one year 
with Havre the next year are given in the first portion of Table 59, 
followed by the coefficients obtained for height with yield and crude- 
protein content. 
Table 59. — Correlation coefficients and probable errors of height in Fi and Fz 
generations and of height with yield and crude-protein content of Marquis-Hard 
Federation wheat crosses grown at Bozeman, Moccasin, and Havre, Mont., in one 
or both of the years 1923 and 1924 
Height 
Correlated with— 
Number 
of F 2 
plants 
or F3 
strains 
Correlation 
coefflcient 
and 
probable 
error 
F2, Bozeman, 1923 .. 
-i-r • uj (F3, Bozeman. 1924 
224 
299 
150 
0. 485±0. 034 
Height | F J Havre> 19 ' 24 ____ _-__ 
-.045=b .039 
F2, Moccasin, 1923 
Height F3, Moccasin, 1924 
. 317± . 050 
Total or average.. ... . 
673 
.212 
(F2, Bozeman, 1923 
F2, Bozeman, 1923.. 
587 
224 
150 
299 
.360± .024 
F 3 , Bozeman, 1924.. 
v M JF3, Bozeman, 1924... 
.381± .039 
F3, Moccasin, 1924.. . 
* ieia IF3, Moccasin, 1924 
. 230± . 052 
F3, Havre, 1924. . 
IF3, Havre, 1924 
.798± .014 
Total or average 
1,260 
.452 
1 (F2, Bozeman, 1923 
F2, Bozeman, 1923.. 
567 
224 
118 
297 
-.025± .028 
F3, Bozeman, 1924 
/-I ,,a~ „ ~+„- I F3, Bozeman, 1924 ... . 
.088± .045 
F3, Moccasin, 1924.. 
Crude protein... .A^ Moccasin ' ; 1924 __ 
.058± .062 
F3, Havre, 1924. 
IF3, Havre, 1924 
-.737± .018 
Total or average. .. 
1,206 
-.171 
The data show that height was positively correlated to a significant 
degree at both Bozeman and Moccasin one year with another, but 
that at Bozeman one year and Havre the next the correlation was 
practically zero. The Moccasin data which are given in Table 60 
well illustrate the inheritance of factors for height and the amount 
of association which has been obtained one year with another at the 
same station. 
