43 
2. A second group of hybrids involves the combination in which 
one parent is resistant to both smuts while the other parent is 
susceptible to the loose, but resistant to the covered. The third 
generation progenies of a hybrid between Early Gothland and 
Markton were grown during the past season. 
3. A third type of cross is between one variety resistant to 
both smuts, while the other is susceptible to the covered but re- 
sistant to the loose. This is the reciprocal of the preceding type 
of cross. Third generation progenies involving Markton, a va- 
riety resistant to both smuts, with Monarch, a variety susceptible 
to the covered smut but resistant to the loose, were grown during 
the past year. 
4. A fourth type of hybrid involves a parent susceptible to both 
smuts, while the other parent is susceptible to the loose smut but 
resistant to the covered. Very extensive data have been obtained 
in hybrids involving Early Gothland & Hull-less, and Early Goth- 
land & Victor. The data were rounded out by the results secured 
during the past season and are now in the press. 
Several third generation progenies of other hybrids of this type 
were also grown during the past year. These involve the va- 
rieties Orientalis & Victor, and Scottish Chief & Victor. The 
Victor variety is susceptible to both smuts, while the other two 
varieties correspond to’ Early Gothland in their susceptibility to 
loose smut, but resistance to the covered. 
ry 
A fifth type of hybrid includes crosses between a variety 
susceptible to both smuts and another variety susceptible to the 
covered smut but resistant to the loose. Such hybrids are analo- 
gous to those recorded in Group 4. [Extensive data have been ob- 
tained with crosses involving Hull-less and Monarch. These data 
have also been prepared for publication and are now in press. 
6. A final group of hybrids includes crosses between one variety 
susceptible to the loose smut while the other is susceptible to the 
covered. During the past year we have published our data on 
certain crosses between Early Gothland and Monarch. The data 
were obtained for the second, third, and, to some extent, for the 
fourth generation of the hybrids. ‘The third generation progenies 
of additional crosses involving this same combination of parents 
were extensively grown during the past season. All these crosses 
4 
