a2 
Hybrid 80, Canadian & Monarch Selection, is an interesting 
contrast to Hybrid 79, since both parents are susceptible to loose 
smut, while Monarch Selection is resistant to the covered. 
Practically all of the second generation plants inoculated with 
the loose smut were infected, and the 25 third generation proge- 
nies grown gave high percentages of infection; altogether, there 
were 402 plants and 399 were infected. 
There were 97 second generation plants inoculated with the 
covered smut and 28 (28.8 per cent.) were infected. There were 
142 third generation progenies grown, of which 84 descended from 
uninoculated second generation plants. These progenies were 
classified as 18 resistant, 40 segregating, and 26 susceptible. 
These data are in harmony with those obtained for the second 
generation. 
Hybrid 81 is a cross between Gothland, a variety susceptible 
to loose smut and resistant to the covered, and Black Mesdag, a 
variety resistant to both smuts. In the second generation, 97 
plants were inoculated with the loose smut and 26 (26.8 per cent.) 
were infected. There were 144 third generation progenies inocu- 
lated with the loose smut, of which 84 descended from uninocu- 
lated second generation plants. The third generation progenies 
were classified as 23 resistant, 38 segregating, and 23 susceptible. 
Again, the results are in close harmony with the data obtained for 
the second generation. 
The second generation of this hybrid gave negative results with 
the covered smut. It is interesting to note that a few infected 
plants appeared in some of the third generation progenies. None 
of the progenies, however, gave a very high percentage of 
infection. 
Hybrid 82 is a cross between Danish Island, fully susceptible 
to loose smut and moderately so to the covered, and Monarch, a 
variety resistant to the loose smut and susceptible to the covered. 
In the second generation, 19.4 per cent. of the plants inoculated 
with loose smut were infected. In the third generation, 195 
progenies were grown, of which 135 descended from uninoculated 
second generation plants. These progenies were classified as 36 
resistant, 15 susceptible, and 84 segregating. 
The results with the covered smut on this hybrid are especially 
