CARCASS AND MEAT QUALITY OF COBB 500 AND HUBBARD CLASSIC BROILER CHICKENS

Istraživanje kvalitete trupova i mesa obavljeno je na dva hibrida Cobb 500 i Hubbard Classic pilića tovljenih do 42. dana. Pilići oba hibrida uzgajani su u jednakim uvjetima smještaja i hranidbe. Utvrđene su žive mase, mase trupova te udjeli osnovnih dijelova u trupu prema hibridu i spolu. Od tehnoloških svojstava prsnog mišića istražene su pH vrijednosti (45 min odnosno 24 sata post mortem), otpuštanje mesnog soka i boja. Za statističku obradu svojstava upotrijebljena je višefaktorijelna analiza varijance (MANOVA 2x2). Utvrđen je statistički značajan utjecaj spola na žive mase (P=0,002), kao i na mase osnovnih dijelova (P=0,001), izuzev prsa. Također je utvrđeno da hibrid utječe na masu prsa (P=0,003) i masu bataka sa zabatacima (P=0,025), kao i na masu krila (P=0,035). Analizom relativnih udjela osnovnih dijelova u trupu utvrđen je visoko značajan utjecaj hibrida na sve osnovne dijelove, a spola samo na udjele prsa i bataka sa zabatacima (P<0,001). Utjecaj hibrida je statistički značajan za vrijednost pH1 (P=0,004) i pH2 (P<0,001), otpuštanje mesnog soka (P=0,015) te boju (CIE L* P=0,015 i CIE a* P<0,001) prsnog mesa, dok je spol statistički značajno uvjetovao samo boju mesa. Sadržaj vode i proteina u prsnom mesu bio je pod utjecajem hibrida (P<0,001 i P=0,021) i spola (P=0,047 i P=0,02). Sadržaji masti, vode, proteina i kolagena u mesu zabataka bili su, također, pod utjecajem hibrida (P<0,001). Može se zaključiti da se oba hibrida pilića odlikuju zadovoljavajućom kvalitetom trupova i mesa.The research on carcass and meat quality traits was carried out on two broiler hybrids, Cobb 500 and Hubbard Classic, fattened up to the 42nd day of age. Broilers of both hybrids were kept equal environmental and feeding conditions. Live weight, carcass weight, and portions of main parts in carcass were determined according to broiler hybrid and sex. Determination of breast technological quality traits referred to pH values (45 min and 24h post mortem), drip loss and meat color. Statistical analysis was performed by multivariate analysis of variance (MANOVA 2x2). It was determined that broiler sex significantly influenced live weights (P=0.002), as well as weights of main parts (P=0.001), except of breasts. It was also determined that hybrid affected weights of breasts (P=0.003) and drumsticks with thighs (P=0.025), as well as weights of wings (P=0.035). Analysis of relative portions of main parts in carcass proved highly significant influence of hybrids on all main parts, and influence of sex was determined only for portions of breasts and drumsticks with thighs (P<0.001). Broiler hybrids statistically significantly influenced pH1 (P=0.004) and pH2 (P<0.001), drip loss (P=0.015) and breast meat color (CIE L* P=0.015 and CIE a* P<0.001), while broiler sex significantly influenced only meat color. Water and protein content in breasts was influenced by broiler hybrid (P<0.001 and P=0.021) and sex (P=0.047 and P=0.02). Fat, water, protein and collagen contents in thighs were influenced by hybrids (P