PEDIGREES AND THEIR VALUE 



241 



would be made. The degree of improvement may be 

 expressed as follows: 



1st generation = Pure sire, scrub dam. The offspring = ^ 

 2nd " = " " 1 A blood dam. " " =-- % 



3rd " = " " M " " " " = % 



/lfV " ; It I/ <( It <* ^^4fi 



5th " = " " 15 /io " " " " =% 



6th " = " " 81 ,fe " " " " = 6 %4 



blood 





 



Fig. 146. A herd of grade feeder cattle at the Ohio Experiment Station. 

 Photograph by courtesy of the Ohio Agricultural Experiment Station. 



Thus it can be seen that in time a herd may become practi- 

 cally pure-bred, although one will not be able to register this 

 high grade stock in most breed registry associations. Yet all 

 pedigrees really start from grade ancestry. 



The bracket form of constructing a pedigree shows the 

 family relationship by means of a series of brackets, after the 

 following manner. This is the most common form in use. 



DUROC-JERSEY BOAR, 



Orion Chief 13333 



16 



f Orion II, 6539. 

 [Mabel 22518 



fOrion 4901 

 \Ohio Anna 10068 

 I Longfellow 6815 

 \Agnes X 15250 



