14 
BULLETIN 1403, IT. S. DEPARTMENT OF AGRICULTURE 
The F 2 plants as classified fell into groups with percentage values 
as shown in Table 12. 
In the F 3 generation the Bozeman material bred into percentage 
distributions in comparison with the calculated as shown in Table 13. 
Table 13.- 
—Comparison of the breeding behavior of the two classes with that calculated 
i 
Comparative items 
F 2 
families 
Fa plants 
Class 1 
Classes 
2 and 3 
f 5.92 
J 12. 36 
1 22.27 
I 59. 45 
f 6.25 
25.00 
I 25.00 
I 43.75 
100.0 
Obtained 
24.6 
7.4 
75 4 
92.6 
100.0 
100.0 
25.0 
6.25 
Cf\] cnlated 
75. 0~ 
93.75 
100.00 
A close fit was obtained for the percentage distribution of F 3 plants. 
There was, however, an excess of F 2 families breeding true for the 
combined 2 and 3 classes and a deficiency in the second group breeding 
in a 1: 3 ratio. Correcting the Bozeman F 2 data on the F 3 results, 
the figures shown in Table 14 are obtained for the total F 2 . 
Table 14. — Comparison of the corrected Bozeman and original Moccasin data 
Station 
Class 1 
Classes 
2 and 3 
Deviation 
from 1 : 15 
ratio 
- Probable 
35 
554 
433 
2 
1 I 
3.96 
. J . 
28 
3.51 
Total (botb stations) 
63 
987 
3 
5.28 
1 
The deviations are less than three times their probable errors and 
show a fit which is not significantly different from a 2-factor or 1 : 15 
ratio. 
The classification of F 2 material resulted in a shortage of plants in 
class 3, while there was an excess of plants of this class in F 3 . It is 
apparent that environment affects the awnedness of plants differently 
in different seasons and that the results of classification did not ex- 
actly coincide in either year with the genetic constitution of the hybrid 
plants. In general, however, the results indicate the presence of 
two pairs of factors. 
Table 15. — Correction of the Bozeman F% awnedness data for the three classes on the 
basis of the Fz results 
Descriptive items 
Class 1 
Class 2 
Class 3 
Devia- 
tions 
Value 
of P. 
Bozeman: 
Original 
Corrected on F3 
38 
35 
443 
419 
108 
135 
1, 38, 39 
2, 14, 12 
0.001 
.446 
Calculated on 1 : 11 :4 ratio 
37 
405 
147 
i 
