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Journal of Animal Science, Vol 69, Issue 2 631-640, Copyright © 1991 by American Society of Animal Science

JOURNAL ARTICLE

Relationship between longissimus composition and the composition of other major muscles of the beef carcass

S. A. Brackebusch, F. K. McKeith, T. R. Carr and D. G. McLaren
Dept. of Anim. Sci., University of Illinois, Urbana 61801.

Left sides from 18 beef carcasses (9 steers and 9 heifers), selected to represent a wide range of marbling scores, were evaluated to determine the relationship between longissimus composition and the composition of other major muscles. The adductor (A), biceps femoris (BF), deep pectoral (DP) gluteal group (GL), infraspinatus (I), longissimus (L), psoas major (PM), rectus abdominis (RA), rectus femoris (RF), semimembranosus (SM), semitendinosus (ST), serratus ventralis (SV), spinalis (SP), supraspinatus (SU) and triceps brachii (TB) were removed, trimmed of external fat, weighed and ground for proximate analysis. Fat content of all muscles was related linearly (P less than .001) to L fat content (R2 values ranged from .67 to .84). The ST had the lowest mean fat content (4.4%) and SP had the highest mean percentage of fat (16.1%). The L ranged from 3.59% to 15.42% fat with a mean of 8.61%. Longissimus fat percentage can be used to predict the fat content of the other major muscles of the beef carcass.


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Copyright © 1991 by the American Society of Animal Science.