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logical characters and their possible relation to the inheritance 
of smut resistance. Various combinations of the parental 
characters were obtained among the progeny. All the results 
indicate that morphological characters and smut resistance or 
susceptibility may be combined in various ways and consequently 
a whole series of new types of resistant oats may be developed. 
The studies on the relative susceptibility of selections from a 
Fulghum-Swedish Select cross to the smuts of oats, carried out in 
cooperation with Mr. T. R. Stanton, Office of Cereal Investi- 
gations, U. S. Department of Agriculture, have been published. 
The variety Fulghum was very resistant to the race of smut used, 
while Swedish Select was susceptible. A very wide range of 
susceptibility in the F, families was observed. It was possible, 
owever, to obtain a number of selections which were highly 
resistant and others which were very susceptible. There ap- 
peared to be no correlation between the morphological characters 
and their susceptibility to the smuts. Certain F; families more 
or less similar to the susceptible Swedish Select proved to be 
quite resistant. 
During the past year the extensive data on the varietal 
resistance of oats to smuts obtained in cooperation with the 
Agricultural Experiment Stations of aho, Iowa, Kansas, 
Missouri and Washington, and the U. S. Department of Agri- 
culture, have been published. A very large collection of varieties 
belonging to the various species of Avena were grown in these 
experiments, which extended over a period of several years. 
Experiments with Sorghum Smuts.—The main studies have 
been concerned with the inheritance of susceptibility of certain 
hybrids to the covered kernel smut (Sphacelotheca sorght). The 
progeny of two different crosses, each involving a susceptible and 
a resistant parent, have been inoculated and their susceptibility 
determined. One serious difficulty has presented itself in that it 
has not been possible to obtain the infection of all the individuals 
which are actually susceptible. Various external factors as soil 
temperature, soil moisture, soil reaction, which prevail at the 
time of the germination of the inoculated seed, influence greatly 
the amount of infection and under field conditions it is not 
possible to control these sufficiently to secure the invasion of 
all susceptible individuals. The resistant parents used in each 
