592 
Journal of Agricultural Research 
Vol. XXVII, No. 8- 
Leaves above the best inflorescence. —With leaves above, where 
several genetic correlations were anticipated, none was found; and, 
while there are some unexpected disherences, these can be attributed to 
physiological causes. 
Number of leaves on the best inflorescence. —With the number of 
leaves on the best inflorescence there are no significant correlations indi¬ 
cating disherences which can not be explained on physiological grounds; 
while the negative correlations with length of season seem clear examples 
of coherence brought about by genetic factors. 
Length of the best inflorescence. —With the length of the best 
inflorescence there are two clear genetic correlations, both negative; that 
with the rows in the terminal spike of the best inflorescence, and that 
with the length of the pistillate portion. The former is not large, but the 
latter is one of the best gentic correlations found. It seems clear that the 
plants with long branches tend to terminate in staminate rather than 
pistillate inflorescences, resembling teosinte in this respect. 
Length of ear stalk of the best inflorescence. —With length of 
ear stalk, which in teosinte is extremely long and in brachytic maize 
relatively short, essentially the same correlations are found as with the 
length of the best inflorescence, and, since these two measurements are 
closely correlated (r= 0.952), such behavior is a necessary consequence. 
The high correlation of 0.952 is not unexpected in view of the fact that by 
far the largest part of the total length of the best inflorescence is made up 
of the length of the ear stalk, the length of the flowering parts forming 
only a small part of the whole. 
Length of the pistillate portion of the best inflorescence.— 
With the length of the pistillate portion of the terminal panicle of the best 
inflorescence there are fourteen coefficients of negative sign which exceed 
three time the error. These coefficients all indicate genetic correlations, 
and include such complex characters as height and season. In addition 
to the negative coefficients, there are several others of positive sign which 
also represent genetic rather than physiological relationship. It seems 
worthy of note that there are no significant disherences with this char¬ 
acter. 
Number of branches in the terminal panicle of the best in¬ 
florescence. —With the number of branches on the terminal panicle of 
the best inflorescence there are two significant disherences, but, like so 
many of the preceding instances of this sort, both are capable of explana¬ 
tion on physiological grounds. 
Number of rows in the terminal spike of the best inflores¬ 
cence. —With the number of rows in the terminal spike of the best in¬ 
florescence there are no significant disherences; there are several rather 
high correlations with other characters of the flowering parts. 
Position of the best spike. —With the position of the best spike 
there is one outstanding disherence—that with days to pollen. In this 
case the plants having die best spikes in the axils of the prophylla, as in 
teosinte, are those with the shorter season. This negative correlation 
seems contrary to that expected, both genetically and physiologically. 
There is one outstanding correlation that clearly can be attributed to 
genetic causes, namely, that of — .364 with the rows of alicoles on the 
best spike. 
Length of best spike.— There are several significant genetic correla¬ 
tions with length of best spike, and no disherent correlations which can 
not be attributed to physiological factors. 
