C orn I nvestigations 
71 
Class No. 6 5 4 3a 1 
Fig. 18. — Degrees of inbreeding with Hogue’s Yellow Dent corn in 1915. 
From right to left: (1) Inbreeding; (3a) narrow breeding; (4) 
broad breeding; (5) natural crossing; (6) original wind fertilized 
Hogue’s Yellow Dent. See Table 25 for seven years’ results for 
these different degrees. 
DEGREES OF INBREEDING, NEBRASKA WHITE PRIZE CORN 
All the different degrees of inbreeding were carried out 
with Nebraska White Prize corn. This is a standard full- 
season, eastern Nebraska variety. The eight highest yielding 
ear-to-row strains as determined in a two-year (1911-1912) ear- 
to-row test with 200 ears were subjected to each of the degrees 
of inbreeding thruout this period. In the comparative yield 
test for the various degrees, the eight strains of each were grown 
in composite. The specialized breeding began in each case in 
1912. Examination of the five years’ results given in Table 26 
discloses that the closer the breeding the lower the yield. It 
would appear that in the production of seed corn any practice 
should be avoided which might result in any degree of close 
breeding. 
