224 



AGRICUI,TUR£; OF MAINE. 



Table 5. 



Shozving Mean or Average Coefficients of Inbreeding for 



American Jersey Cattle, for both Random Samples 



of the General Population of both Sexes 



and Samples of the Animals in the 



Register of Merit. 



Class or Gkoup. 



Mean Coefficients of Inbreedi>7g. 



Z3 



Great-great 

 grandparents. 



Lower 

 limit. 



ITpper 

 limit. 



Z4 



Great-great— great 

 grandparents. 



Lower 

 limit. 



Upper 

 limit. 



Z5 



(Great)^ 

 grandparents. 



Lower 

 limit. 



Upper 

 limit. 



1. General population (ran- 

 dom sample) bulls 



2. Register of Merit bulls 



3. General population (ran- 

 dom sample) cows 



4. Register of Merit cows 



32.77 

 43.99 



33.82 

 28.53 



Class or Group. 



Mean Coefficients of Inbreeding. 



Z6 



(Great)* 

 grandp.arents. 



Lower 

 limit. 



L'pper 

 limit. 



Z7 



(Great)* 

 grandparents. 



Lower 

 limit. 



LTpper 

 limit. 



1. General population (random sample) bulls. 



2. Register of Merit bulls 



3. General population (random sample) cows. 



4. Register of Merit cows 



39.14 

 34 . SO 

 41.03 

 33.12 



47.93 

 62.03 

 48.18 

 44. OG 



46.07 

 37.07 

 47.56 

 39.22 



63.12 

 77.77 

 63.10 

 61.45 



