(M CO't* iO 
July 1, 1924 
Inheritance in Kota-Hard Federation Grosses 
43 
A summary of the coefficients is as 
follows: 
F 2 , 1922: 
At St. Paul, Minn_ 0. 348 ±0. 025 
AtMandan, N. Dak_ . 405+ . 017 
F 3j 1923: 
At Mandan, N. Dak_ . 288+ . 023 
Important and significant correla¬ 
tions between yield and height were 
obtained. Height appears to be of 
greater importance than any of the 
other characters studied. As the 
amount of the correlation was con¬ 
siderably reduced at Mandan in F 3 as 
compared with F 2 , it is possible that 
the increase is partly expressive of hy- 
cientlv large to justify the selection of 
tall plants instead of short ones. 
It is desirable to determine the in¬ 
heritance of average height of row in 
F 3 in comparison with height of F 2 
plants at Mandan. The correlation 
of 0.556 + 0.038 in 152 F 2 plants, given 
in Table XXXVIII, is both high and 
significant. 
YIELD AND AWNEDNESS 
The effect of the awn or its absence 
on yield alreadv has been discussed. 
It was shown that the presence of 
awns was of some importance under 
droughty conditions. In addition to 
determining the mean yield of the 
Table XXXVIII.— Correlation between height of plant in F, and in F 3 material 
of crosses of Kota and Hard Federation wheats grown at Mandan, N. Dak. r 
in 1922 and 1923 
brid vigor. There were no particu¬ 
larly high yielding short plants in F 2 . 
Height had more of an effect on yield 
at Mandan under droughty conditions 
than at St. Paul under rather humid 
conditions. Apparently shortness of 
plant is not correlated with real drought 
resistance. The correlations are suffi- 
plants in each awn class, it seems de¬ 
sirable to determine the correlation 
between awnedness and yield. The 
Mandan F 3 data are given in Table 
XXXIX. The awn classe's are (1) 
awnless, (2) apically-awnletted, (3) 
awnletted, (4) short-awned, and (5) 
awned. 
Table XXXIX.— Correlation between yield of plant and awnedness in F 3 material 
of crosses of Kota and Hard Federation wheats grown at Mandan, N . Dak., in 
1923 
Awnedness classes 
1 
Total 
Yield of plant in grams 
Total 
i 
j 
; 0.5 
1.5 
2.5 
3.5 j 4.5 
5.5 
6.5 
1 
! 
26 
50 
■ 1 
31 j 11 
i 2 
120 
6 
40 
114 
90 ! 37 
| 6 
1 4 
297 
1 
12 
• 37 
38 j 9 
6 
1 
104 
7 
31 
23 ! 9 
1 
71 
3 
12 
43 
48 | 24 
4 
134 
10 
97 
275 
230 1 90 
1 
18 
6 i 
726 
r=0.104±0. 025 
