FACTORS FOB YIELD AND QUALITY OF SPRING WHEAT 
57 
Table 51. — Leading F$ strains at Bozeman, Moccasin, and Havre, as determined 
by the product of their yield and crude-protein content together with other char- 
acters, in comparison with the best and average parent checks 
Station and strain 
B 1-102 
Bl-57 
B3-53 
A2-47 
B2-57 
B2-37 
Best Marquis 
Best Hard Federation. 
Average Marquis 
Average Hard Feder- 
ation 
Moccasin: 
Al-30 
Cl-23 
Cl-21 
A2-91 
A2-52 
A3-47 
Best Marquis 
Best Hard Federation . 
Average Marquis 
Average Hard Fed- 
eration 
Havre: 
Bl-51 __| 318 
Bl-54 | 319 
Row 
No. 
Combined characters 
Date of- 
First 
heading 
37 
68 
67 
166 
121 
6 
70 
40 
B2-89 
Bl-48 
Bl-57 
Bl-19. 
Best Hard Federation. 
Best Marquis 
Average Hard Fed- 
eration 
Average Marquis 
324 
317 
321 
201 
335 
310 
July 8 
July 6 
July 5 
...do..... 
—do 
July 9 
July 10 
July 3 
July 9 
July 4 
July 5 
July 8 
July 5 
July 7 
July 4 
July 7 
July 9 
July 3 
July 9 
July 3 
July 11 
July 10 
...do— .. 
July 11 
...do..... 
July 10 
July 8 
July 12 
July 8 
July 13 
Last 
ripening 
Sept. 
Sept. 
Sept. 
Sept. 
Sept. 
Sept. 
Sept. 
Aug. 29 
Sept. 2 
Aug. 30 
Aug. 20 
Aug. 22 
Aug. 21 
Aug. 22 
Aug. 17 
Aug. 18 
Aug. 24 
Aug. 19 
Aug. 23 
Aug. 17 
Aug. 20 
Aug. 21 
...do 
Aug. 19 
Aug. 21 
Aug. 20 
Aug. 21 
Aug. 20 
Aug. 16 
Aug. 19 
Fruit- 
ing 
Height 
period 
(inches) 
(days) 
58 
40 
59 
38 
59 
37 
58 
37 
60 
34 
57 
39 
55 
37 
57 
29 
55 
38 
57 
29 
46 
45 
45 
43 
47 
44 
46 
44 
44 
42 
42 
45 
46 
43 
47 
41 
45 
43 
45 
40 
40 
30 
42 
25 
42 
28 
39 
28 
41 
30 
41 
28 
44 
26 
39 
27 
39 
22 
37 
23 
Yield 
per 
plant 
(grams) 
8.9 
8.0 
7.9 
8.0 
7.4 
7.3 
7.0 
5.2 
5.0 
4.2 
244.4 
38.0 
39.4 
37.0 
36.7 
36.8 
34.7 
39.3 
30.8 
29.7 
4.8 
4.4 
4.3 
4.4 
4.2 
4.1 
4.2 
2.7 
2.1 
1.7 
Crude- 
pro- 
tein 
con- 
tent 
(per 
cent) 
Yield Xcrude 
protein 
15.1 
15.1 
15.1 
14.6 
15.4 
15.6 
16.1 
14.8 
15.1 
Prod- 
uct 
134.39 
120. 80 
119. 29 
116.80 
113.96 
113. 88 
112. 70 
76.96 
i 76. 61 
Per- 
centage 
of the 
aver- 
age of 
Mar- 
quis 
14.7 162.76 
13.2 
14.1 
13.5 
14.2 
13.8 
13.7 
586. 08 
535. 80 
531. 90 
525. 40 
506. 46 
504.16 
3 15. 2 ! 468. 16 
3 14. 415. 80 
14.2 
15.4 
13.6 
13.1 
13.5 
13.8 
14.7 
16.3 
68.16 
67.76 
58.48 
57.64 
56.70 
56.58 
61.74 
44.01 
15.1 I 31.43 
16. 8 ' i 29. 53 
175.4 
157.7 
155.7 
152.5 
148.8 
148.6 
147.1 
100.5 
100.0 
81.9 
125.2 
114.4 
113.6 
112.2 
108.2 
107.7 
230.8 
229.5 
198.0 
195.2 
192.0 
191.6 
209.1 
149.0 
106.4 
100.0 
1 Average of the products of the individual check rows. 
2 Yields at Moccasin are in bushels per acre. 
i Crude-protein content based on only one row. 
CORRELATION OF CHARACTERS IN THE F 2 AND F 3 GENERATIONS 
The inheritance of the six quantitative characters previously dis- 
cussed is further studied in connection with their correlation under 
different environmental conditions. The amount of correlation 
between the different characters serves as a guide for making selec- 
tions. Correlation coefficients have been determined for all of the 
possible combinations of the six characters — heading period, ripening 
period, fruiting period, height, yield, and crude-protein content. 
The correlations were made on differing amounts of material grown 
at the three Montana stations — Bozeman, Moccasin, and Havre — 
during one or both of the two years 1923 and 1924. In 1923 the corre- 
lations were based on results from individual F 2 plants. In 1924 the 
correlations were obtained on the row data from F 3 strains. 
