52 Nebraska Agricultural Exp. Station , Research Bui. 20 
made of the Mendelian behavior of the various plant characters. 
However, the crooked stalk of strain 5 (fig. 12) is dominant in 
all of its F 1 hybrids (hybrids Nos. 12X5 and 10X5, fig. 14), and 
in the second generation (F 2 ) it breaks up in the normal F 2 
ratio. The orange midrib of strain No. 10 is recessive in its F, 
Male parent: 12 1 10 10 2 2 12 10 5 5 
Female parent: 4 4 8 9 8 12 10 2 12 10 
Fig. 14. — Typical plant of Hogue’s Yellow Dent corn at left and typical 
plants of ten first generation hybrids between some of the inbred 
strains shown in figure 12. The numbers below the plants show 
which of the strains in figure 12 were crossed. The grain yields of 
eight of these hybrids are given in Table 15 for four years in com- 
parison with the original Hogue’s Yellow Dent. Photograph taken 
in 1915. 
hybrids, which break up in the simple Mendelian ratios in later 
generations. For example, comparing the first and second gen- 
erations of the hybrid No. 2X10 (Table 10), all of the first gen- 
eration plants had green midribs; while out of a total of 351 
second generation hybrid plants observed, 78 had orange and 273 
green colored midribs. This amounts to an actual 22 per cent 
orange colored midribs, whereas the theoretical number for a 
simple unit character should be 25 per cent. 
Only eight F, hybrids between elemental strains reported 
