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Sorghum Smuts 
Miss D. Elizabeth Marcy has continued the studies on the in- 
heritance of resistance to loose and covered smuts of sorghum. 
During the past year, the second generation plants of 15 different 
sorghum hybrids were grown. These hybrids represented crosses 
involving parents which differed in various ways in their reaction 
to loose and covered smut. Usually, two sets of IF’, plants of each 
hybrid were grown, one set being inoculated with the loose smut 
and the other set with the covered smut. On the average, there 
were more than 100 plants grown in each series. The parental 
varieties were also included for comparison, 
An extensive series of third generation progenies of Hybrids 
1-A and 1-B, Feterita x Sumac Sorgo, was grown. There were 
two sets of 38 F, progenies of Hybrid 1-A, one set being inoc- 
ulated with loose smut and the other with the covered. There 
were 36 F, progenies of Hybrid 1-B grown, having been inoc- 
ulated with the covered smut. A detailed study of the inherit- 
ance of resistance to the smuts in relation to the inheritance of 
the red color of the seedling and the juicy or pithy character of 
the stem was made. Feterita is characterized by pithy stems, in 
contrast to the sweet sorghum type of the Sumac Sorgo. 
Forest PATHOLOGY 
By ArtHuUR HarMountT GRAVES 
Work on Japanese-American Hybrids During 1932 
Continuing the account of the 124 hybrid Japanese-American 
chestnuts secured by cross pollination in 1931, described in my 
report for 1931 in the Brooklyn Botanic Garden Recorp (Vol. 
21, pp. 46-53), these nuts, with a few exceptions, were planted 
immediately after harvesting, in (1) sandy soil procured from 
woods at Oyster Bay, L. I., where native chestnut was formerly 
abundant, (2) in garden loam, and (3) in gravel. One hun- 
dred nuts germinated, or about 80 per cent., which is consider- 
ably higher than the figure (68 per cent.) given by Professor 
Toumey! for the germination of the chestnut. The accom- 
1Toumey, J. W. Seeding and Planting in the Practice of Forestry. 
NE Ya 1916. paaee: 
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