﻿20 BULLETIN" 1372, U. S. DEPARTMENT OF AGRICULTURE 



Table 9. — Method of breeding of each of 23 sires and records of their dams 



Sire 



Record of his dam 



How this bull was 

 bred 



How his sire was 

 bred 



How his dam was 



Time 



Milk 



Butterfat 



bred 



E 



No record - 



7 days 



do 



\l year 



7 days 



—do 



—do 



...do 



...do 



...do 



/-do 



\1 year 



No record. 



7 days 



No record. 



7 days 



17 days 



11 year 



7 days 



..do— . 



Pounds 



Pounds 



Line bred (28.1 1).... 



Outbred (18.75 1).... 



Line bred (34.37 i)..- 



JLine bred (34.37 !).... 



Outbred 



Inbred (56.24 ') 



Outbred 



Line bred (25 >) 



Outbred 



Line bred (31.2 i). 



B 



567.9 

 534.5 

 545.1 



20, 174. 6 

 539.1 

 e38.7 

 520.1 

 568.9 

 707.6 

 480.3 

 535.4 



15, 972. 2 



25.04 



22.1 



22.1 



724.7 

 19.5 

 24.4 

 20.2 

 20.0 

 24.6 

 24.7 

 23. 4 



593.8 



Outbred. 



C 



D 



Inbred (50 i) 



Outbred 



Line bred (25 >). 

 Outbred. 



A 



F 



n 



Line bred (43.75 1)... 



Line bred (25 1) 



Outbred-.. 



Do. 

 Inbred (50 >). 

 Outbred. 



G 



.. do .. 



Line bred (26.31 i)... 

 Outbred 



Do. 



I 



ii"-do^-— — — iin 



1 . do . 



Do. 



L 



J. 



do 



Outbred (18.75 i).... 

 Outbred 



Do. 



Outbred (18.75 i) . 



K . . 



Outbred 



Outbred. 



N 



523.7 



16.7 



Line bred (23.12 1)... 



do 



Line bred (43.75 i). 



Q 



Outbred 



do 



.....do-y...'.'.'."'."'. 



Outbred. 



T 



469.2 

 478. 

 2 16,679. 

 437.6 

 533.6 

 581.7 

 558.5 

 514.1 

 437.1 

 423.7 



14.4 

 19.2 

 s 622. 5 

 15.87 

 21.0 

 22 

 20.4 

 20.3 

 16.2 

 19.42 



Do. 



M 







P 



JLinebred (31.25 i)... 



Inbred (65 i).. 



Outbred 



do 



Line bred (21.87 i)... 

 Outbred . 



Do. 



Line bred (251). 

 Outbred. 



W 



...do 



Inbred (62.49 i) 



do 



Inbred (75 i). 



R 



...do 



...do 



...do 



...do 



Outbred 



do 



Outbred. 



S 



Outbred (12.5 '). .. 



do. 



Do. 



V 



u 



Outbred 



Line bred (31') 



do 



do - 



Do. 

 Do. 



1 Per cent common blood. 



2 At 11 years 1 month 



On the basis of the dam's records one would hardly be able to 

 select the best breeding sire from the first group of 10. These rec- 

 ords, however, average higher than the records of the dams of the 10 

 poorest sires. The records of the dams of the 10 poorest sires do not 

 follow any more closely the ranking of the sire according to merit 

 than is the case with the 10 best sires. 



It is hardly to be expected that the mere fact of an individual, his 

 sire, or his dam, being line bred or inbred would cause him to be more 

 prepotent than if he were outbred; that is, without any concentra- 

 tion of blood lines. In order that the line breeding or inbreeding may 

 have a favorable effect on prepotency it would seem necessary that 

 the individual which appears more than once in the ancestry be an 

 animal of superior breeding ability. It is a common belief, however, 

 that the mere fact that a sire is outbred militates against the chances 

 of his being prepotent. Three of the five sires heading the list in 

 Tables 7 and 9 were line bred, the second and fifth each being out- 

 bred. Fourteen of the 23 sires are classed as outbred. Six of the 

 firet 10 sires are in this class and 6 of the last 10 sires are also classed 

 as outbred. 



The pedigree of any individual is only an indication of what the 

 transmitting ability of that individual, for milk and butterfat pro- 

 duction, may be. Until such time as we have pedigrees in which the 

 sires have a sufficient number of tested daughters irom tested dams, 

 so that their breeding performance can be analyzed, as has been done 

 with these 23 sires, predictions can not be made with much certainty 

 as to the transmitting ability of any untried individual. When 

 animals are produced with pedigrees in which all the sires for several 

 generations have ability to transmit, such as sires E, B, and C dis- 

 played, then it will be fairly certain that the majority of the bulls 



