The Inheritance of Quantitative Characters in Maize 67 
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Jh<r. ■ S GO S? S/ !t Z SL 
Fig. 13. Height of plants of the F, generation of Tom Thumb X Mis- 
souri dent, as grown in 1910. 
In 1910 the parent varieties and a small number of F x plants 
were again grown for comparison with the F 2 generation. No. 
509. the F-l generation, is from the same crossed ear that pro- 
duced No. 170, No. 508 from the same ear as No. 151, and No. 
363 from the same ear as No. 116. Again the F x generation was 
intermediate between the parents in height of stalks with a 
comparatively small range of variation. The F 2 generation, 
family 510, contained some plants quite as small as the smallest 
of Tom Thumb pop and some as large as the average of the 
Missouri dent, with all gradations between. Since no selfed 
seed was obtained from the two original plants used in the cross 
it cannot be known in hew far they were heterozygous for size 
