gaul: induced mutants in seed-propagated species 



237 



CO 

 LU 



U. 

 O 



Od 



LU 

 CD 



z 



96 



98 



100 



102 



104 



10S 



108 



RELATIVE 1000- KERNEL WEIGHT 

 Figure 6.— Effect of selection for higher 1 /JOO-kernel weight in progenies 

 of X-rayed spring barley. Control is taken as 100. Results of 1059. Only 

 9 lines out of 44 have a lower 1 ,000-kernel xueight than the control. 



nies of spring barley. This program includes already an untreated 

 control. It seems that it is relatively easy to screen directly for small 

 mutations affecting yield and the results obtained so far will be 

 published elsewhere. 



