﻿TRANSMITTHsTG ABILITY OF HOLSTEIN-FKIESIAN SIEES 



27 



yield (see sires S and V), the increase in percentage of fat was very 

 small. In the daughters of sire G, the sire showing the greatest 

 average increase in percentage of fat, there was an average increase in 

 milk, as was also the case with the daughters of sire N, the sire show- 

 ing the greatest decrease in percentage of fat. These data show that 

 the percentage of fat and the milk yield in Holstein-Friesian cattle 

 are inherited independently, and that it is entirely possible for a 

 sire to increase both the milk jdeld and the percentage of butterfat. 



Table 14. — Sires with daughters showing greatest percentage increase in milk 

 yield and their percentage increase or decrease in, butterfat test 



Sire 



Average 

 increase (+) 

 Or decrease 

 (— ) in milli 

 yield o 

 daughters 

 compared 

 with dams 



Average 

 increase (+) 

 or decrease 



(-)of 

 daughters 

 compared 

 with dams 

 in fat test 



Sire 



Average 

 increase (+) 

 or decrease 

 (— ) in milk 



jaeld of 

 daughters 

 compared 

 with dams 



Average 

 increase (+) 

 Or decrease 



(-)of 

 daughters 

 compared 

 with dams 

 in fat test 



A... 



Per cent 

 +35.3 

 +24.1 

 +23.7 

 +21.4 

 +18.2 

 +17.2 

 +17.1 

 +15.4 

 +14.6 

 +12.8 

 +6.5 

 +6.0 



Per cent 

 +4.02 

 +3.24 

 -5.43 

 +0.94 

 • +2.59 

 -0.60 

 +0.91 

 +1.16 

 -5.80 

 -8.84 

 +6.57 

 -3.27 



J-.. 



Per cent 

 +5.9 

 +5.8 

 +5.6 

 +2.1 

 +1.3 

 -1.4 

 -4.2 

 -4.6 

 -5.4 

 -7.3 

 -12.0 



Per cent 

 +5.46 

 +0.28 

 +7.92 

 —2 63 



B 



M. . 



I__ 



G-_-.. 



D 



Q 



C._. 



R 



—3 48 



H.. 



T_.- 



—6 30 



E . 



U 



—7 47 



F__. 



P--- 



+5.90 

 —5 18 



L 



W 



N._ 



S. - 



+1.41 

 +1.54 



K.. 



V... 



. 









Table 15. — Distribution of daughters of each sire with respect to corresponding 

 increases and decreases in both yield of milk and percentage of butterfat 





Number of daughters 







Yield of 





Yield of 









milk in- 



Yield of 

 milk in- 



milk de- 



Yield of 







creased; 



creased; 



milk de- 



Sire • 





percent- 



percent- 



creased; 





Total 



age of 

 butterfat 



percent- 



age of 



butterfat 



decreased 



age of 

 butterfat 



percent- 

 age of 







increased 



increased 



butterfat 







or left 

 un- 



or left 

 un- 



also de- 

 creased 







changed 





changed 





A - 



5 

 13 

 )2 



9 



3 



8 

 5 

 4 



1 

 3 



5 

 3 



1 

 

 2 



1 







B„ 



2 



C... 







D 



1 



E 







4 



2 











F 



9 

 7 

 6 

 6 



20 

 



11 



3 

 2 

 1 

 



8 

 4 



J 



4 

 1 

 4 

 4 

 3 

 

 8 



2 

 2 

 1 

 1 

 8 

 2 

 1 







o„ 



2 



H. 







I . 



1 



J. . 



1 



K 







L 



1 



M 



(i 

 '.) 

 1) 

 (; 



1 

 3 



1 

 



2 

 1 



1 

 1 

 2 



5 



1 



S 



3 







1 



p 







Q 



li 



2 



;; 



2 



2 



li 



c, 



1 



2 



1 



2 



H... 



7 

 7 

 7 







1 

 



:i 



3 

 

 1 



1 



T 



3 



U 



4 



V - 



7 







1 



5 



1 



w 



16 







5 



2 



9 



Total 



V.IH 



52 



07 44 



35 



