1917] FIELD CEOPS. 739 



S. R., 34, p. 41), in which it is shown that a group of characters introduced 

 by one of the orifeiiial parents failetl to affect the Fj generation. 



The author lias found that all gray-chaffed wheats are rough-chaffed, but 

 that all rough-chaffed wheats are not gray. In the Fa generation in crosses of 

 Rivet wheat with Polish wheat (T. polonicum) having white glumes, over 2,000 

 plants raised from 20 separate Fi crosses had the identical glume color of 

 Polish -wheat. Cases are cited where red-grained varieties, in which the parents 

 bred true to color, when crossed produced white-grained varieties. The sup- 

 pression of a dominant character in the Fj generation, from parents showing 

 dominant characters only, is thought to be more frequent in wheats than it 

 appears to be at present. It is suggested that this suppression may be due to 

 the existence of more than one determining factor for the dominant character 

 (in this case, color), and that consequently two factors determining the reces- 

 sive character may occasionally meet in the zygote, thus completely suppressing 

 the dominant. 



Work in connection with Egyptian wlieat, G. C. Dudgeon and G. Boliand 

 (3Iin. Agr. Egypt. Tech. and Sci. Serv. Bnl. 7 {1916), pp. 9).— This bulletin out- 

 lines investigations being conducted with native and imported wheat at the 

 Gheezeh School of Agriculture, together with a discussion of the results ob- 

 tained thus far. The native types are of the Baladi variety. Imported seed 

 from England, America, Russia, Cyprus, Australia, and Sudan, were sown be- 

 tween November IS and December 1, 1914. These varieties were badly infested 

 with rust and in 1915 only three native varieties and the Muzaffarnagar wheat 

 of India were sown. Of these varieties the White Baladi gave the highest yield. 



An experiment was also undertaken to determine the rate of seeding and the 

 comparative value of plowing in and harrowing in the seed. The same variety 

 was used in all tests, and a rate of 6 kelehs per feddan (2.5 bu. per acre) 

 harrowed in gave the best results. 



A series of experiments to determine the best method of treating seed for 

 the prevention of smut included treatments with copper sulphate solutions 

 varying in strength from 0.5 to 10 per cent and with Cyllin from 1:2,000 to 

 1 : 250. The results obtained indicate that all the treatments greatly reduced 

 smut infection, but that the copper sulphate solutions stronger than 2 per cent 

 and all the Cyllin solutions were too strong and reduced germination. 



Carman's wheat-rye hybrids, C. E, Leighty (Jour. Heredity, 7 (1916), No. 

 9, pp. Jf^O-427, figs. 4). — This is a comprehensive summary of the work of 

 Elbert S. Carman, a former editor of the Rural New Yorker, in his attempts to 

 establish a wheat-rye hybrid. The fact is brought out by the author that many 

 of the supposed hybrids in the Rural New Yorker series show no trace of rye 

 characters and that only one variety originated from a real wheat-rye hybrid. 

 This variety, known as No. 6, is an actual descendant from the true wheat-rye 

 hybrid obtained in 1883. 



Seed reports, 1914, 1915, J. W. Kellogg and H. E. Gensler (Penn. Dept. 

 Agr. Buls. 258 {1915), pp. S5 ; 276 (.1916), pp. 35, figs. 5).— A report of the seed 

 inspection for 1914 and 1915 is given. A copy of the seed law, directions for 

 sampling seed, and the standards of purity used in seed testing are included in 

 the report for 1914, while in that for 1915 100 noxious weed seeds found in 

 farm seeds are described and illustrated. 



Results of seed tests for 1916, F. W. Taylob and F. S. Pkince (New Hamp- 

 shire Sta. Bui. 180 (1916), pp. 18). — This reports the analysis of 84 samples of 

 seed collected by the station during the year 1916, and other data. 



Michigan weeds, W. J. Beal (Michigan Sta. Bui. 267, 2. ed. (1915), pp. 181, 

 figs. 248). — This is a revised edition of a bulletin previously noted (E. S. R., 

 27, p. 343), following the American Code of Nomenclature in the second edition 

 94087°— No. 8—17 4 



