36 
BULLETIN 1403, U. S. DEPARTMENT OF AGRICULTURE 
Table 34. — Fruiting period in the F z generation of 672 Marquis-Hard Federation 
wheat hybrids, in comparison ivith 79 parent checks, grown at Bozeman, Moccasin, 
and Havre, Mont., in 192 % 
Number of rows 
Fruiting period 
Bozeman 
Moccasin 
Havre 
F 3 
hybrids 
Hard 
Feder- 
ation 
Mar- 
quis 
F 3 
hybrids 
ssi] Ma ?- 
arion , *™ 
-p Hard 
Mar- 
quis 
32 days. . . 
l 
i 
33 days . 
34 davs . . 
1 
35 davs . .. 
10 1 
25 
61 
71 3 
60 7 
1 
36 davs.. . 
37 days. . 
2 
38 davs 
3 
39 days .. 
3 
40 days 
1 
3 
9 
30 i 3 
17 i 2 
17 : i 
5 
1 

1 
42 davs 
43 days 
22 
30 
47 
23 
10 
3 
1 
1 

1 
4 
2 
2 
3 
4 
1 
1 
1 
46 days 
48 days.. . 
49 days.. .. . ... 
1 
1 
1 
l 
51 davs. 
52 davs.. 
4 
4 
9 
21 
29 
40 
63 
35 
15 
3 
i _ 
1 
4 ! 3 
3 j 4 
3 | 3 
l 
i 
I . 
57 days ... . ... 
1 
! 
1 
1 
1 
L 

61 days... 
i 
! 
Total 
Average period in days. 
224 
57.2 
13 13 | 150 
56. 8 i 55. 5 44. 6 
9 
45.6 
9 298 
44.3 j 38.4 
18 : 17 
39.9 | 37.2 
I 
The data in Table 34 show the longer fruiting period of Hard 
Federation as compared with that of Marquis. At two of the three 
stations the mean fruiting period of the hybrids was intermediate to 
those of the parents, but at Bozeman the mean of the hybrids ex- 
ceeded those of both parents. The fruiting period on a row basis 
in the F 3 generation illustrated in Figure 6 shows greater variability 
for the hybrids in comparison with the parents than did the fruiting 
period on an individual plant basis in the F 2 generation. The wide 
variation in fruiting period at the three stations is most striking, 
showing environmental effect due to differences in moisture, tem- 
perature, soil fertility, etc. The length of the fruiting period was 
increased with the more favorable environmental conditions from 
Havre to Moccasin and to Bozeman. 
Selections were made from the F 2 generation based on the length 
of fruiting period. The progeny of some of the F 2 plants of longest 
fruiting period were included among the families studied on an indi- 
vidual-plant basis in the F 3 generation. From these, data on rows 
having the longest and shortest fruiting period, in comparison with 
the nearest studied parent check rows at Bozeman and Havre, are 
given in Table 35. 
The fruiting period in the F 3 generation of strain A2-77 was the 
shortest of any studied at Bozeman and averaged 3.58 ±0.86 days 
