Predikcia zmasilosti jatocne opracovanych tiel osipanych na zaklade plochy m.l.d., resp. slaniny a ich pomerov.
1996
Demo P. | Poltarsky J. | Kucera J.
Carcass value parameters (percentage of valuable lean cuts - VLC and/or percentage of lean meat content in vivo, average backfat thickness) were determined in 172 hybrid pigs. The percentage of lean meat was determined in the pigs by in vivo method using a PIGLOG 105 instrument a day before slaughter. The day after slaughter, carcass value parameters were determined in accordance to the standard CSN 46 6164: backfat thickness was measured above the center of the second and/or last thoracic vertebra and above the center of the first lumbar vertebra as well as average backfat thickness calculated from the above measures. The eye-muscle area (m.l.d.) and backfat area above m.l.d. were determined at the level of the last rib at the 3rd to 4th lumbar vertebra as well as at the 3rd to 4th last rib of halving section. The values for the proportions of valuable lean cuts were 50.68; 45.48; 48.26 and 49.30 % in the final hybrids of average slaughter weight about 105 kg. The correlations between eye-muscle area at the different spots of halving section and VLC proportion and/or total meat proportion in vivo were at the level r = 0.29 to 0.52 while the values of correlation coefficients between backfat area above m.l.d. at the same spots of measurements and VLC proportions and/or total meat proportion ranged from r = -0.75 to -0.82. The correlations between meatiness parameters (VLC % and/or lean meat content in vivo) on the one hand and the ratios of backfat area and eye-muscle area had the value r = -0.81 to -0.90.
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