U uzgojnom programu za simentalca u Hrvatskoi naglasak je na kakvoći mesa. U agregatnom iznosu uzgojne vrijednosti (UV) sadržane su tovne i klaoničke karakteristike, te njihove kemijske vrijednosti. Za sada senzorne karakteristike, te njihove kemijske vrijednosti. Za sada senzorne karakteristike se ne uvažavaju. Indeks je sastavljen od uzgojnih vrijednosti za dnevni prirast, hladni randman i sadržaj čistog mesa. Struktura tkiva u ovom istraživanju procijenjena je disekcijom uzoraka 7-9 rebra. Analizirano je 29 progenih grupa s ukupno 326 sinova- mladih bikova. Podaci su analizirani leastsquare metodom (Harvey, 1979.) uvažavajući utjecaj godine i sezone. Prosječna težina hladnih polovica iznosila je 304.15 kg. Postoci čistog mesa (mišićnog tkiva), masnog tkiva i kosti u i sječku iznosili su 63.91%, 13.96% i 18.93%. Odnos meso:kosti iznosio je 3.58, a meso kosti meso:loj 4.78. U suhoj tvari MLD sadržano je 21 .83% proteina i 1.42% masti. Heritabilitet za sadržaj mesa, kosti i loja u isječku iznosio je 0.702,0.421 i 0.489. Dobiveni rezultati podudaraju se sranijim rezultatima u nas (Karadjole, 1978; Car, 1981 ; Caput, 1985), ali se razlikuju od priopćenih rezultata istraživanja u nekim drugim simentalskim uzgojima (Averdunk i sur., 1992.; Petautschnig, 1992.). Razlike se mogu djelomično objasniti različitim metodama i tehničkim postupcima pri klanju, primarnoj obradi i disekciji. Relativno visok sadržaj kosti u trupu naših simentalaca mora biti predmet pažnje u budućim selekcijskim programima.In Croatian Simmental breeding program the great emphasis is on meat quality. So far in the aggregate breeding value (BV) there are fattening and carcass characteristics and chemical components, but no sensor characteristics. The index consists of breeding values of daily gain, carcass percentage and meat content. In this paper structure of tissue of slaughtered bulls were evaluated on the dissection samples of 7 -9 rib cut. There were 326 bulls, progenies of 29 test sires. Data were analysed by least squares (Harvey, 1979), and corrected on year and season. Average cold carcass weight was 304.15 kg. The meat, fat and bone content in the rib cut were 63.91%, 13.96% and 18.93 %, respectively. Meat:bone and meat:fat ratio were 3.58 and 4.78, respectively. In MLD (dry matter) there were 21.83% protein and 1.42% fat. Heritability (h2) and correlations (r) for 10 slaughter traits were estimated. The h2 for meat, bone and fat contents in the rib cut were .702, .421 and .489, respectively. The results in this paper were similar to those from Karadiole (1978), Car (1981) and Caput (1985), but different from results in other Simmental breeding areas in Europe (Averdunk et al. 1992; Petautschnig, 1992). The differences could partly be explained by different methods and technological procedures in slaughtering and dissection. There were unusual high bone content, and low muscle: bone ratio. This is the fact which must be improved in Croatian Simmental
