BULLETIN 971, U. S. DEPARTMENT OF AGRICULTURE. 
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Fig. 4. — Frequency distributions with respect to the num- 
ber of branches on the ear in plants of the second- 
generation ramose segregates of Ramosa-Gordo maize 
hybrids. 
rows and the length 
of the ear spike and 
—0.472 between the 
total number of 
branches and the 
number of rows. 
Both coefficients in- 
dicate that as the cen- 
tral axis approaches 
a normal ear in 
length it also resem- 
bles a normal ear in 
the number of rows. 
Among the tassel 
characters no corre- 
lations are found 
which are not capa- 
ble of obvious ex- 
planation. Thus big 
tassels have long 
central spikes, while 
the longer the cen- 
tral spikes the fewer 
the branches. 
Table II. — Summary of tlve correlations between the ear and tassel characters 
in the second generation of Ramosa-Gordo maize hybrids. 
[The population for which these coefficients were calculated consists of 102 individuals, 
greater than 0.196 exceeds three times the probable error.] 
Any coefficient 
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Branches on ear 
-0. 472 
-0. 596 
0.235 
-0.642 
0.055 
-0. 237 
0.546 
-0. 291 
Number of rows on the cen- 
tralspike of the ear 
-0. 472 
.756 
.300 
.745 
.147 
.192 
- .308 
.156 
Length of the terminalspike 
of the ear 
- .596 
.235 
.756 
.300 
'""."391' 
.391 
.946 
.179 
.163 
.398 
.241 
.147 
- .393 
.035 
.154 
Length of the entire ear 
- .103 
Ear spikeindex 
- .642 
.745 
.946 
.179 
.134 
.212 
- .406 
.152 
Length of tassel 
.055 
.147 
.163 
.398 
.134 
.407 
.123 
- .115 
Length of the central spike 
of the tassel 
- .237 
.192 
.241 
.147 
.212 
.407 
- .409 
.811 
Number of branches in the 
tassel 
.546 
- .291 
-. 308 
.156 
- .393 
.154 
.035 
- .103 
- .406 
.152 
.123 
- .115 
-. 409 
.811 
-'.'563" 
-. 503 
Central spike index 
THIRD GENERATION. 
The appearance at harvest of markedly intermediate ears as- 
sociated with intermediate tassels indicated that intermediate forms 
