370 LUTHER BURBANK 



These seedlings have created much specula- 

 tion as to their heredity among experts who have 

 seen them. They are best explained, I think, 

 on the theory proposed above. 



Nearly three-fourths of the Isabella Regia 

 seedlings bore partially seedless fruit. About 

 half the grapes on each bunch usually were 

 altogether seedless. Some entire clusters were 

 seedless. Yet other vines of the same fraternity 

 bore fruit in which the seeds were unusually 

 large. 



By selection among these vines I have devel- 

 oped several races of nearly seedless grapes that 

 are of exceptional quality. The best of these 

 will be introduced, and they will also be of value 

 in hybridizing experiments for the production of 

 seedless grapes of other varieties. 



Once produced, such varieties must obviously 

 be propagated by cuttings, but this of course 

 presents no difficulties. 



The matter of hybridization, crossing, and 

 selection of fruit having been gone into quite ex- 

 tensively in early chapters, only a glimpse of the 

 special features of the work with the grape has 

 been here recorded. The methods of crossing 

 and selection having been discussed in previous 

 chapters, it would be mere repetition to give them 

 here; and for this reason the details have not 



