Aug. 18, 1923 
Inheritance of Dwarfing in Maize 
303 
nearly of the same height, while the dwarf segregates are much smaller 
with no overlapping (5). This is different from the brachytic-dwarf 
hybrid, where the brachytic and dwarf segregates form one group and the 
normals the other. An examination of the height data shows that 
brachytic occupies with respect to stature a position intermediate between 
anther ear and dwarf, approaching the dwarf stature rather more closely 
S? & C 
Fig. 2. ^-Comparison of the plant heights of normal, anther ear, and dwarf as grown by the Emersons, 
with normal, brachytic, and dwarf from the dwarf-brachytic hybrid. A, Average height of Emersons’ 
normal, anther ear, and dwarf plants. B, Average height of normal, brachytic, and dwarf plant from 
the dwarf-brachytic hybrid reduced in proportion to the difference between the normal segregates of the 
two hybrids. C, Average height of normal, brachytic, and dwarf plants from the dwarf-brachytic hybrid. 
than the anther ear. This relationship is shown diagrammatically in 
figure 2. 
The entire population of the brachytic-dwarf hybrid was taller than 
that of Emerson's anther ear dwarf, but in reducing each stature 
group of the brachtyic-dwarf hybrid in proportion to the difference 
between the normal segregates of the two hybrids, the groups of dwarf 
stature are found to be very similar, the mean height being 3 and 3.87, 
respectively, while the mean height of the brachytic group becomes 6.8 
as compared with 14.8 for the anther ear stature. 3 
8 Three F2 populations are shown in the Emersons’ paper. Two of these populations are very similar 
in the mean height of the three groups, while the other (the first) is somewhat smaller. In making the 
height comparisons, the group having the tallest plants of normal stature was chosen; this population 
also had the largest number of individuals but the relationships of the three height groups in anther-ear 
dwarf to those of the brachytic-dwarf would remain very much the same irrespective of which of the three 
anther-ear dwarf groups was selected. 
