Oct. 7,1918 Crosses between Dairy and Beef Breeds of Cattle 



51 



rib for these Angus crossbreds is increased, as is also the width of the 

 brisket. The measurements of the hind parts of the body show there 

 is no change from the general form of the other crossbreds other than 

 a slight shortening of the rump. 



This conclusion is not in entire agreement with the few known recorded 

 crosses where descriptions are given. Bruce {12) records crosses result- 

 ing from Dexter cattle with Shorthorns as wonderful beef animals. 

 Boyd {10) says of his wide crosses of bisons with domestic cattle that 

 the following chaiacters are dominant: A somewhat modified hump of 

 the bison, width of hind quarter, and width in front of the beef breeds. 

 Nabours {26), describing the crosses made by Borden (9) of Bos indicus 

 on Bos taurus says a modified hump, great increase in body size, and 

 dewlap are characteristic of the F^ progeny. The heavy filling in front 

 is characteristic for all of these crosses. Bruce and Boyd, however, 

 record an increase in the size and quality of the hind quarters. The 

 author finds no such increase in his crosses. 



From his results the author may say that for the improvement of the 

 beef qualities of dairy breeds the first-generation crosses result in an 

 increased value of the beef qualities in the fore quarters without mate- 

 rially influencing the hind quarters. 



MILKING QUALITY OF' THE Fj OFFSPRING 



Since the results on the milking qualities of the Fj offspring are of 

 interest, as they are new, it seems well to add them to this study, 

 although they are as yet few in number. Tables XXIX and XXX give 

 the age, days in milk, production, and the production expected from 

 these animals when they reach their maximum at mature form. By 

 forming a column for the difference in excess of the parent over that of 

 the offspring it is possible to compare their productions and clearly 

 bring out the differences. This same method may also be used for both 

 fat and fat percentage. Tables XXIX and XXX give the results of such 

 treatment. The quantity and the quality of the milk are separately 

 treated, as it has been shown by Wilson (49-^6), Pearson (39), and 

 others (40) , that the quality bears little relation to the quantity of the 

 milk flow. 



Table XXIX. — Transmission of milk production from parental to first filial generation 



