536 



Journal of Agricultural Research 



Vol. XIX, No. II 



inoculated with the form of Puccinia graminis tritici which was used in 

 obtaining the field epidemic. Three different tests of resistant and 

 susceptible segregates of emmer, common, and durum F3 lines were 

 m.ade. The results are given in Table VIII. (See PI. 102.) 



Table VII. — F2 lumillo (C 1 1^36) X Marquis and Kubanka (C / 2094 ) X Marqiiis^ 

 iR= resistant to stemrust. S= susceptible to stemrust] 



1 The coefficient of correlation between density and type as durum, near-durum, intermediate, near- 

 common, and common is -I-0.330 ±0.024. 



Table VIII. — Comparison of resistant and susceptible F^ lines with Marquis, Ktibanka 

 (C I 2og4), and lumillo (C / 1736Y 



' The authors wish to express their thanks to M. N. Levine, Assistant Pathologist, Office of Cereal Inves- 

 tigations. Bureau of Plant Industry, United States Department of Agriculture, for preparing Table VIII 

 and Plate loi and for conducting the greenhouse experiment on which they are based. 



