160 Maine Agricultural Experiment Station. 1919. 



By the use of these methods three tables have been formed. 

 The first table, No. 4, gives the necessary information to show 

 what were the transmitting qualities of Jersey sires for milk 

 production. The second table, No. 5, shows the information 

 necessary to determine the transmitting qualities of Jersey 

 sires for butter-fat percentage. The third table, No. 6, shows 

 the transmitting qualities for these same Jersey sires for net 

 butter-fat. 



There are 224 Jersey Registry of Merit sires which meet 

 the requirements of this performance test for their transmitting 

 qualities in milk production. One hundred and five of these 

 sires or less than one-half raise the milk production of their 

 daughters over that of the dams of these daughters. The larg- 

 est number of daughter-dam pairs is 39 for the sire Hood Farm 

 Pogis 9th, 55552. Of those sires which have a large number of 

 pairs, Hood Farm Torono 60326 with 34 pairs stands first in his 

 transmitting qualities raising the milk production of his daugh- 

 ters on the average 2620.1 pounds. The relative milk produc- 

 tions of his daughter-dam pairs on a percentage basis are 26 

 AA+3AB+9BA+3BC+32CA-H-9CB+9DA+3DB+3DC. De- 

 scribed in words, this bull was bred to 26 per cent of the high- 

 est group of milking cows and produced 26 per cent of the 

 highest group of milking daughters ; bred to 3 per cent of the 

 highest group of milking cows he produced 3 per cent of the 

 second highest group of daughters, etc. 



The next sire with a good number of daughters was Sperm- 

 field Owl. This bull with 26 daughter-dam pairs raised the milk 

 production of these daughters on the average 1695.7 pounds. 

 The relative milk productions of his daughter-dam pairs on 

 a percentage basis are 12AA+ 4AB+4AC-T-23BA-I-12BB-I-4BC 

 +8CA+8CB+4CD+12DA+4DB+8DD. 



Among the other sires standing well up in the lists might 

 be mentioned Queen's Raleigh, 88232; Sans Aloi 81012; Tem- 

 isia's Interested Prince 71698; The Plymouth Lad 89792; and 

 Chief Engineer 47148. 



Two hundred and twenty-five sires are included in the 

 table 5 giving the sires which met the requirements of the 

 daughter-dam performance test for transmitting qualities of 

 butter-fat percentage. Out of this number 101 sires raised the 

 butter-fat percentage of their daughter's milk as compared 

 with the butter-fat percentage of the dams of these daughters. 



