1080 
Journal of Agricultural Research, 
Vol. XXX, No. 11 
Table V.— Inheritance of lemma color 
in strains of the Kherson oat grown 
at the Akron Field Station, Akron, 
Colo., in 1921,1922, and 1923— Con. 
DATA FOR 1922—Continued 
Lemma color in progeny 
Color of 
parental lemmas 
and group 
Number of 
lemmas 
Percentage of 
lemmas 
number 
ll 
f5 
5 
| 
s 
■83 
3 
'g'S 
rt * 
£ 
K* 
it 
Yellow—Contd. 
25 
3.8 
96.2 
11 
102 
9.7 
19. 
41 
26 
61.2 
38.8 
20. 
2 
84 
2.3 
97.7 
23. 
64 
100.0 
25. 
100 
100.0 
26. 
78 
100.0 
127 
100.0 
29. 
73 
100.0 
30. 
4 
71 
5.3 
94.7 
34. 
31 
93 
25.0 
75.0 
38. 
2 
28 
6.7 
39. 
17 
100.0 
40. 
130 
mo 
41. 
.... 
75 
100.0 
All groups. 
173 
1,720 
118 
8.6 
85.6 
5.9 
White: 
5. 
105 
100.0 
6. 
42 
32 
56.8 
43.2 
7. 
20 
37 
16 
27.8 
51.4 
20.8 
8. 
6 
81 
70 
3.8 
51.6 
44.6 
9. 
4 
55 
2(1 
4.7 
64.7 
30.6 
10. 
2 
64 
13 
2.9 
78.3 
18.8 
11. 
34 
46 
42.5 
57.5 
14. 
12 
18 
40.0 
All groups. 
80 
416 
170 
12.8 
61.9 
25.3 
DATA FOR 1923 
The parental groups in which the 
lemma color was described as reddish 
yellow in 1922 produced progenies of 
which over 96 per cent of the lemmas 
was yellow. White parental kernels 
produced progenies in which about 62 
per cent of the lemmas was yellow and 
13 per cent reddish yellow. Parental 
kernels classed as yellow produced 
yellow progeny very largely. 
It would be difficult to explain on a 
factorial basis the data on lemma color 
shown in Table V. All classes tended 
to produce a high percentage of yellow 
kernels. Most of the reddish-yellow 
lemmas in Kherson apparently are due 
to physiological causes. The white 
kernels appeared unstable in breeding 
behavior in 1921 and 1922, as they pro¬ 
duced many of the yellow and reddish- 
yellow types. In 1923, however, paren¬ 
tal white kernels produced only white 
progeny. Probably many genetic yel¬ 
lows were incorrectly described as white 
in the 1921 crop, due to physiological 
influences. This condition is very evi¬ 
dent in the progeny of groups 6, 6, and 
14, from which no white kernels what¬ 
ever were produced in 1922. The 
parent kernels, apparently, were simply 
bleached yellow. 
These data indicate that at least two 
genetic color types exist in the Kherson 
oat—yellow and white. The yellow 
type apparently is decidedly more 
numerous and also less influenced by 
physiological factors than the white. 
Possibly some of the yellows are hetero¬ 
zygous, which would account for the 
occurrence of white kernels in the pro¬ 
genies of parental kernels described 
as yellow. Physiological factors may 
account for some of the progeny of 
white kernels being described as yellow 
and reddish yellow in 1921 and 1922. 
SUMMARY 
The Kherson and Sixty-Day oats are 
identical for all characters. Together 
with the pure-line selections developed 
from them, they constitute a very im¬ 
portant agronomic group, occupying 
about 14 per cent of the oat acreage in 
the United States in 1919. 
Several valuable selections have been 
made from the variety, among which 
Albion (Iowa No. 103), Richland (Iowa 
No. 105), Iowar, Nebraska No. 21, and 
States Pride (Wisconsin No. 7), are the 
most important. 
The variability of the variety and 
the possibility of making selections 
from it have long been recognized. 
Numerous crosses using strains of the 
variety have been made, and the ge¬ 
netic constituton of some of the result- 
