81 



This, <>t course, is tantamount to saying that we need additional 

 income for all aspects of our work, for they all come under one or 

 the other, or both, of these purposes. 



This statement and the civic and educational importance of the 

 Brooklyn Botanic Garden are earnestly commended to the attention 

 of those who may be in a position to bequeath something to causes 

 that interest them, so that the work of the Garden may be placed on 

 a permanent and more nearly adequate financial foundation. 



It is hoped that the perusal of this, my thirtieth animal, report 

 will leave the members of the Board of Trustees and all other 

 friends of the Garden gratified but not satisfied. 



Respectfully submitted, 



C. Stuart ( jager, 



Director. 



REPORTS ON RESEARCH FOR 1940 



Plant Pathology 



By George M. Reed 



Studies on the Inheritance of Resistance of Oat Hybrids 

 to Loose and Covered Smuts 



In the last Annual Report data were given concerning the reac- 

 tion of third generation progenies of a hybrid between Navarro and 

 Hull-less, inoculated with race 1 of each of the loose and covered 

 smuts. Navarro is highly resistant to both these races, while Hull- 

 less is very susceptible. The results indicated that the inheritance of 

 resistance to the loose smut depended upon two independent factors, 

 while inheritance to the covered smut depended upon three factors. 



Many additional third generation progenies of this hybrid were 

 grown during the past season. A set of 225 progenies was in- 

 oculated with race 12 of the loose smut, and 226 were inoculated 

 with race 7 of the covered smut, both races differing from those 

 used tor inoculation in the previous year. The extensive data ob- 

 tained wkh this race of the covered smut indicate that three factors 

 tor inheritance are involved. Thus the inheritance of resistance 

 to both races of covered smut depends upon three factors. The 



