18 
BULLETIN 1403, U. S. DEPARTMENT OF AGRICULTURE 
as those from which families Al and A3 descended. The pollen, 
however, was collected at random from several plants in a row of 
Hard Federation. 
Table 18. — Segregation in the Fi generation into red and white kernel classes of 
1,052 plants of Marquis-Hard Federation and reciprocal wheat crosses grown 
at Bozeman and Moccasin, Mont., in 1923 
Number 
ofFi 
families 
F2 plants by kernel color 
Devia- 
tion from 
15 : 1 ratio 
Probable 
error 
Station, cross, and hybrid No. 
Red 
White 
Total 
B02EMAN 
MarquisXHard Federation: 
21202B1 
1 
1 
1 
91 
94 
92 
8 
4 
8 
99 
98 
100 
2 
2 
2 
1 62 
21202B2 
1 62 
21202B3 
1 63 
Total: 
3 
277 
93.3 
20 
6.7 
297 
2 
2 81 
Percentage. 
Hard FederationXMarquis: 
21203A1... . 
1 
1 
1 
93 
95 
94 
3 
3 
6 
96 
98 
100 
3 
3 

1 60 
21203A2 
1.62 
21203A3 .. 
1 63 
Total: 
3 
282 
95.9 
12 
4.1 
294 
6 
2 80 
Percentage. ._ ... . 
Grand total: 
Number.. . ... . 
6 
559 
94.6 
32 
5.4 
591 
5 
3.97 
Percentage.. . .. .. 
MOCCASIN 
MarquisXHard Federation: 
21202A1 
1 
1 
1 
64 
66 
63 
17 
6 
14 
81 
72 
77 
13 
1 
15 
2.63 
21202A2 
1.39 
21202A3 
2.56 
Total: 
1 
66 
91.7 
6 
8.3 
72 
1 
1.39 
Hard FederationXMarquis: 
21203C1... 
1 
1 
1 
74 
69 
69 
7 
4 
8 
81 
73 
77 
2 
1 
3 
1.47 
21203C2... 
1.39 
21203C3 
1.43 
Total: 
Number. _ ...: .. 
3 
212 
91.8 
19 
8.2 
231 
5 
2.48 
Grand total: 
Number. _ ... ... . 
4 
278 
91.7 
25 
8.3 
303 
6 
2.84 
Total (both stations): 
Number 
10 
837 
93.6 
57 
6.4 
894 
1 
4.88 
1 Deviation from 3 : 1 ratio. 
The study was continued in F 3 material from Bozeman, all of 
which in F 2 segregated in a 15:1 ratio. The data obtained are 
given in Table 19. 
The material at Bozeman in 1924 was affected by root-rot to the 
extent of about 18 per cent. The plants affected matured prema- 
turely and produced kernels very much shrunken. For this reason 
no accurate classification of the affected plants could be made for 
kernel color, and only plants having normal kernels were included 
