142 Nebraska Agricultural Exp. Station, Research Bui. 20 
EAR TYPE SELECTION VERSUS SELECTION FOR FREEDOM FROM 
ROOT-ROT DISEASES 
In the preceding yield tests, TO disease free ears and 59 badly 
diseased ears of Hogue’s Yellow Dent corn were compared for 
duplicate ear-to-row plats with a check plat of the 
unselected corn planted after every tenth plat. The 
or absence of disease had been established previously 
yield in 
original 
presence 
by the recognized _ 
selected as extremes from among 959 ears tested. Their selec- 
tion for the yield test was based entirely upon the disease indi- 
cation without reference to ear type, which had been theretofore 
germinator test, and the above ears were 
among 
independently deten 
in the order of gen 
thus distributing tl 
e various tvpes 
lined and recorded. The ears were planted 
linator testing without regard to ear type, 
iv chance 
the test 
Unselected VS 
ear to row plats 
Chart 6. — Ear type 
Ear to row p/ats 
Ear to row plati 
versus root-rot disease selection. Two hundred 
duplicate for grain yield per 
original variety. The ear-to- 
ing to presence or absence of 
seven ear-to-row plats are compared in 
acre with unselected bulk seed of the 
row seed ears are classified first accon 
root-rot disease by means of the germinator test, and are then 
grouped according to ear type irrespective of disease. Data taken 
from Table 61. 
