16 
BULLETIN 1403, TJ. S. DEPAKTMENT OF AGKICTJLTTmE 
plants, respectively. The expected numbers are 66, 722, and 262. 
The deviations are 3, 7, 4, and the value of P, 0.896 indicates a very 
close fit. 
GLUME COLOR 
Glume colors of wheat are most commonly classed as white and 
brown. Biffen (2) was first to report brown glume color dominant 
over white in the single 3 : 1 ratio. Xo other ratio is known to 
have been found in crosses between varieties of common wheats. 
The present study includes data on the segregation of F 2 plants 
for color of glumes at Bozeman and Moccasin in 1923. The results 
obtained are shown in Table 16. 
Table 16. — Segregation in the F2 generation into brown and white glume classes 
of 1,050 plants of Marquis-Hard Federation wheats and reciprocal crosses grown 
at Bozeman and Moccasin, Mont., in 1923 
Station, cross, and hybrid No. 
Number 
of Fi 
families 
F2 plants by glume color 
Devia- 
tion from 
3 : 1 ratio 
Probable 
Brown 
White 
Total 
error 
BOZEMAN 
MarquisXHard Federation: 
21202B1 
1 
1 
1 
68 
71 
21 
30 
29 
98 
98 
100 
4 
5 
4 
2.89 
21202B2.* 
21202B3. - 
2.89 
2.92 
Total: 
Number - 
3 
216 
73.0 
SO 
27.0 
296 
6 
5.02 
Percentage... . 
Hard Federation XMarquis: 
21203A1 
1 
1 
1 
73 
74 
23 
23 
23 
96 
97 
100 
1 
1 
2 
2.86 
21203A2 
21203A3 
2.88 
2.92 
Total: 
Number 
Percentage.. . 
3 
224 
76.5 
23.5 
293 
4 
5.00 
Grand total: 
Number 
6 
440 
74.7 
149 
25.3 
5S9 
2 
7.09 
MOCCASIN 
MarquisXHard Federation: 
21202A1 . 
1 
1 
1 
54 
55 
58 
27 
17 
19 
81 
72 
77 
7 
1 

2.63 
21202A2 
2.48 
21202A3 
2.56 
Total: 
Number . ....... 
3 
167 
72.6 
63 
27.4 
230 
■0 
4.43 
Hard FederationXMarquis: 
21203C1 
21203C2 
21203C3 
1 
1 
1 
59 
61 
59 
22 
12 
18 
81 
73 
77 
2 
6 
1 
2.63 
2.50 
2.56 
Total: 
Number 
3 
179 
77. 5 
52 
22.5 
231 
■ 
4.44 
Grand total: 
Number.. . 
6 
346 
75.1 
115 
24.9 
461 

Total (both stations): 
Number 
12 
786 
74.9 
264 
25.1 
1,050 
1 
9.47 
