62 
BULLETIN 1403, U. S. DEPARTMENT OE AGRICULTURE 
FRUITING PERIOD 
The coefficients of correlation obtained for 'the fruiting period one 
year with another at Bozeman and at Bozeman one year with Havre 
the next year are given in the first portion of Table 57 and are followed 
by the coefficients obtained for the fruiting period with height, yield,, 
and crude-protein content. 
Table 57. — Correlation coefficients and probable errors of fruiting period in F 2 and 
Fz generations and of fruiting period with height, yield, and crude-protein content 
of Marquis-Hard Federation wheat crosses grown at Bozeman, Moccasin, and 
Havre, Mont., in one or both of the years 1928 and 192 % 
Fruiting period 
Correlated with — 
Number 
of F 2 
plants 
or F 3 
strains 
Correlation 
coefficient 
and probable 
error 
F2, Bozeman, 1923 .. 
-c, ... . , /F3, Bozeman, 1924 .. 
224 
298 
0. 097±0. 045- 
Fruiting period... | F J; Havre> ^ 
. 000± .030 
Total or average 
522 
.042 
F2, Bozeman, 1923.. 
) (F2, Bozeman, 1923. 
583 
. 078± .028 
F 3 , Bozeman, 1924.. . 
Itt • v,+ J F3, Bozeman, 1924... 
224 
150 
298 
. 144=fc . 044 
F3, Moccasin, 1924.. . 
pieigni < F ^ Moccasillf 192 4 
. 246± . 052 
F3, Havre, 1924. 
J IF3, Havre, 1924 
" . 657± . 022 
Total or average . 
1,255 
.247 
) (F2, Bozeman, 1923 
F2, Bozeman, 1923 
583 I . 324± .025 
F3, Bozeman, 1924 
l v . , -, JF3, Bozeman, 1924 
224 . 296± . 041 
F3, Moccasin, 1924.. 
f IieiQ IF3, Moccasin, 1924. 
150 ! . 079± .055 
F 3 , Havre, 1924.. 
J IF3, Havre, 1924 
298 ' .601± .025 
1,255 .355 
| (F2, Bozeman, 1923 
F2, Bozeman, 1923 __ 
567 j — . 170± . 028 
F3, Bozeman, 1924.. 
In A + • F3, Bozeman, 1924 . 
224 < . 512-!- . 033 
F3, Moccasin, 1924.. 
Crude protein..... F J; Moccasin ; 1924 __ ; _ 
118 . 082± .062 
F 3 , Havre, 1924 
J I F 3 , Havre, 1924 
296 -.537± .028 
Total or average . .. ...... 
1, 205 -- 1f>9 
, 
The data show that the fruiting period was not inherited to a signifi- 
cant degree at Bozeman one year with another and that at Bozeman 
one year with Havre the next a zero coefficient was obtained. 
Fruiting period and height were found to be positively correlated 
with significant coefficients obtained for three of the four experi- 
ments. The average correlation of 0.247 is hardly important. 
Fruiting period and yield were found positively correlated and 
in a significant amount in three of the four experiments. The average 
coefficient of 0.355 is much more important than that of either heading 
period or ripening period with yield. Of the five factors studied for 
their association with yield, fruiting period is second only to that of 
height. The important relation between fruiting period and yield- 
is illustrated by the F 2 data from Bozeman in Table 58. 
On the average, fruiting period was found to be negatively cor- 
related with crude-protein content, although in two instances the 
correlations were positive. At Bozeman in the F 2 generation there 
resulted a fairly large and significant negative correlation and at 
Havre in F 3 a very large one. At Bozeman in the F 3 generation, 
however, a large positive correlation was obtained, and at Moccasin 
the coefficient was slightly positive. The average correlation of 
— 0.109 is not important. This again illustrates, as in the case of 
