engleski

Influence of genotype on meat yield estimation in swine carcasses

Influence of genotype on estimation of meat yield in swine carcasses was researched in this paper. Four groups of pigs (15 males and 15 females, n=30 in each group) were included in the research. In each group were pigs of different genotype as follows: 1st group=/LWxGL/xGL ; 2nd group=/LWxSL/xGL ; 3rd group=/SLxLW/xLW and 4th group= pigs of unknown genotype. Pigs were slaughtered in several slaughterhouses in east Slavonia. Meat yield was determined by total dissection (TD), according to WENIGER et al. (1963) and estimated by 3 different equations. First equation (PF) was taken from current Croatian regulation and other two (MF2 and MF3) were obtained by researches of KU[EC (1996). Equations MF2 and MF3 appeared to be more appropriate for lean meat estimation in all groups of pigs, except for the 3rd group which had the lowest objectively determined (TD) meat yield. In this group equation PF predicted lean meat percentage better than other two. According to average meat yield obtained by dissection (TD) and by equations MF2 and MF3, swine carcasses from the 1st group were classified in class E. Equation PF classified the same carcasses in class U. On the basis of average objectively determined (TD) and estimated meat yields (MF2 and MF3) swine carcasses from 2nd group were classified in class U, while equation PF classified them in class R. Swine carcasses from 3rd group were classified in class R on the basis of objective determination and estimation by equation PF, while equations MF2 and MF3 classified these carcasses in class U. Carcasses of 4th group of pigs were on the border between classes U and R according to total dissection (TD), while estimations by all three equations classified these carcasses in class R.

swine ; carcass ; meat yield ; estimation ; equations

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