COMPARATIVE STUDY ON SOME CHEMICAL AND BIOCHEMICAL TRAITS OF BREAST MUSCLE IN THREE GENOTYPE BIRDS
Keywords:
broilers, genotype, breast muscle, chemical compositionAbstract
The experiment was carried out on male birds belonging to the three genotypes (100/group): fast-growing stock cross-breed Cobb; slow-growing synthetic population line RB and male-chickens layer-type cross-breed Lohmann-Brown Classic (LBC). Birds were intensively reared and feed ad libitum, a diet containing 3.050 kcal/ kg energy and 23.19% of crude protein. Experiment was finished when birds reached about 1.400 g of live weight in different age. Six birds from each groupwere slaughtered and carcasses were cooled for 24 h. All carcasses were dissected and analyseis for moisture, protein, fat, ash and cholesterol were carried out on the breast muscles.
In the breast, no significant differences concerning for moisture and protein were found between line RB and both other genotype. No significantly differences were found and for LBC hybrids compared to both other genotype. The Cobb hybrids displayed most high content of cholesterol and most low content of ash compared to line RB (P<0.05).Compared to the LBC hybrids Cobb had most high content of moister (P<0.05) and most low content of proteins (P<0.001). Lowest content of cholesterol was found for LBC hybrids compared both other fenotype (P<0.001). The Cobb hybrid displayed the highest lipids content, followed by line RB and hybrid LBC (P<0.001), in descending order.
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