lO 



MAINE AGRICULTURAL EXPERIMENT STATION. 



TABLE 5. 



Shozving Mean or Average Coefficients of Inbreeding for 

 American Jersey Cattle, for hath Random Samples of the 

 General Population of both Sexes and Samples of the Ani- 

 mals in the Register of Merit. 



Class or Group. 



1. General population 

 (random sample) bulls 



2. Register of Merit 

 bulls 



3. General population 

 (random sample) cows 



4. Register of Merit 

 cows 





6 



^ 



a 







F 





ri 







a 





-& 



5 



ura 





^ 





^ 











^ 



Z 



= 



Mean Coefficients of Inbreeding. 



ZO Parents. Zl Grandparents. 



Lower Upper Lower 

 limit, limit. limit. 



Upper 

 limit. 



Z2 Great- 

 gr.\ndp.^rents. 



Lower 

 limit. 



Upper 

 limit. 



67 











1.87 



63 











1.59 



61 











4.10 



as 















1.87 



1.59 



4.10 







5 



.41 



5 



36 



6 



97 . 



2 



98 



5.41 

 5.62 

 6.97 

 2.98 



Class or Group. 



Mean Coefficients of Inbreeding. 



Z3 Great-great 

 Grandparents. 



Lower 

 limit. 



Upper 

 limit. 



Zi Great- 

 great-great 

 Grandparents. 



Lower 

 limit. 



Upper, 

 limit. 



Z5 (Great)4 

 Grandparents. 



Lower 

 limit. 



Upper 

 limit. 



1 . General population 

 (random sample) bulls . . . 



2. Register of Merit bulls 



3. General population 

 (random sample) cows . . . 



4. Register of Merit cows 



11.01 

 14.88 



12.50 

 9.23 



11.21 

 15.91 



12.59 

 9.42 



19.59 

 23.32 



21.26 

 15.33 



20.79 

 28.39 



21.89 

 16.27 



29 



48 



30 



28 



31 



53 



24 



63 



32.77 

 43. 9S 



33.82 

 28.53 





Mean Coefficients of Inbreeding. 



Class or Group. 



Z6 (Gre.a.t)5 

 Grandparents. 



Z-! (Great)6 

 Gr.\ndparents. 





Lower Upper 

 limit. limit. 



Lower Upper 

 limit. imit. 



1. General population (random sample) bulls 39.14 



2. Register of Merit bulls 34 .80 



3. General population (random sample) cowS; 41 .03 



4. Register of Merit cows | 33 . 12 



47.93 

 62.03 



48.18 

 44.06 



46 



07 



37 



07 



47 



56 



39 



22 



63.12 

 77.77 

 63.10 

 61.45 



