100 



Gronth Curves of 

 Two Inbred Strains 

 of Maize and Their 

 P]^ and Fg Hybrids. 



to 



4) 



o 



c 



i 



A3 

 00 



"T 



60 



90^ 



50 60 70 80 



Number of Days from Planting 



Fig. 148. Graphs showing growth curves of two inbred strains of maize, P (1-7) and P (1-9), ami of 

 their Fi and F2 hybrids. Note that both Fi and F2 are at all ages much taller than either inbred fwirent 

 race, but that Fi is considerably taller than F2, as the plants approach maturity. (After East and 

 Jones.) 



