152 INBREEDING AND OUTBREEDING 



100 



75 



I 



50 



25- 



Growth Curves of 

 Two Inbred Strains 

 of Maize and Their 

 FJL and F 2 Hybrids. 



30 40 50 60 70 80 90 



Number of Days from Planting 



100 



Fio. 33. Graphs showing growth curves of two inbred strains of maize and their first 



and second generation hybrids. 



