-< 



t 





•-^i 



\ r 



m 



Fig. 11.5 — When the inbred 4R-3 is crossed with No. 701 the liybrid ear illustrated above 

 (left) is produced. When a modified strain of 4R-3 (right) which has had three blocks of genes 

 from Durango teosinte substituted for corresponding maize genes is crossed with No. 701, 

 the hybrid (center) is much more maize-like than teosinte-like. The hybrid, being multiple- 

 eared, bears a substantially greater number of seeds than either parent and in one experi- 

 ment was appreciably more productive. 



