TRANSMITTING ABILITY OF HOLSTEIN-FRIESIAN SIRES 
29 
There is a significant correlation between the daughters and their 
dams with respect to percentage of butterfat in the cases of the fol- 
lowing seven sires (Table 17) : 
Table 17. — Sires between whose daughters and their dams there is a significant 
correlation 
Sire 
Correlation 
Sire 
Correlation 
F 
+0.75 ±0.10 
+0.98 ±0.01 
+0.65 ±0.16 
+0.94 ±0.03 
S 
+0.75 ±0.11 
H 
V 
+0.79 ±0.09 

M 
+0.93 ±0.04 
R 
This marked correlation is easily seen when the percentages of 
butterfat of daughter and of dam are placed side by side and ranked 
according to the size of the daughters' tests, as shown in Table 18 
for the daughters of sires S, H, and R. 
Table 18. — Percentage of butterfat of daughters of sires S, H, and R, and their 
dams, showing positive correlation 
Sire 
Daugh- 
ters 
Dams 
Sire 
Daugh- 
ters 
Dams 
Sire 
Daugh- 
ters 
Dams 
S__ 
Per cent 
4.30 
4.00 
3.88 
3.44 
3.28 
3.27 
3.18 
Per cent 
4.44 
3.88 
3.22 
3.37 
3.63 
3.34 
3.24 
H 
Per cent 
3.75 
3.66 
3.37 
3.13 
3.04 
3.01 
Per cent 
3.72 
3.74 
3.39 
3.14 
3.08 
2.92 
R 
Per cent 
3.40 
3.31 
3.23 
3.20 
2.75 
2.61 
Per cent 
3.53 
3.25 
3.33 
3.53 
2.74 
2.74 
These figures show, as does the coefficient of correlation, that the 
butterfat test of the daughters of these sires follows very closely 
that of their dams. The average percentage of butterfat of the 
daughters was very close to the average percentage of butterfat of 
the dams, with each of these three sires. The average percentage 
of butterfat of the daughters of sires R and H were slightly less than 
the average of the dams, whereas the average for the daughters of 
sire S was slightly greater. On the other hand a comparison of tests 
of the daughters of other sires and their dams shows that the test 
of the daughters does not follow that of their dams. The compara- 
tive tests of the daughters of the two sires G and J and their dams, 
shown in Table 19, illustrate this point. 
Table 19. — Per cent of butterfat of daughters of sires G and J and their dams, 
showing no correlation 
Sire 
Daugh- 
ters 
Dams 
Sire 
Daugh- 
ters 
Dams 
Per cent 
Perc ent 
Per cent 
Per cent 
G 
4.39 
3.83 
3.70 
3.58 
4.31 
4.30 
3.70 
4.01 
4.25 
3.61 
3.66 
3.60 
4.21 
3.25 
3.61 
3.70 
3.81 
3.88 
3.59 
3.29 
3.43 
3.60 
3.59 
3.29 
3.32 
3.52 
3.55 
3.55 
J 
4.29 
4.14 
3.42 
3.53 
3.55 
3.48 
3.33 
3.46 
4.04 
3.46 
3.44 
3.42 
3.80 
3.61 
3.40 
3.46 
3.79 
3.45 
3.39 
3.27 
3.78 
3.59 
3.24 
3.60 
3.77 
3.28 
