Muscle profiling: Characterizing the muscle of Brazilian cattle breed 'Crioulo Lageano'

摘要

The “Crioulo Lageano” cattle (Bos taurus), is a breed native to Brazil, with herds concentrated in the Lages city, Santa Catarina state, Brazil. The adverse conditions with cold winters and poor vegetation developed a breed adapted to the ecological conditions of this region. However, commercial breeds such as Nellore, gradually replaced the native breeds to the point that cattle “Crioulo Lageano” almost disappear. In this way studies have been conducted both for genetic conservation, the characteristics of meat quality. The purpose of this work was to comparing six cuts of commercial meat (filet steak, round, loin, rib, heel and filet) of “Criolo Lageano” and Nellore cattle. Chemical composition, color, and weight ratio muscle/carcass were determined. Twenty animals male (10 Nellore and 10 "Crioulo Lageano") castrated and 18 months old were studied. The different cuts were chemical analysed in FURG University, Brazil. The samples were finely chopped, mixed thoroughly and analysed in the duplicated to determine their chemical composition. Moisture (oven at 105°C), protein (Kjeldahl method, factor 6.25) were determined according to AOAC, (1995) and fat determined by Bligh Dyer, (1959). Instrumental color (CIE L*, a*, b* for Illuminat A) was evaluated using Minolta DC300 Spectrophotometer. The results shown there is no significant difference observed (0.05) in the fresh carcass weight, hell, filet and subcutaneous fat of Nellore and “Crioulo Lageano”. The biggest statistical difference was observed in relation to weight of loin (p=0,00168) and rib (p=0,000144). The chemistry composition shown significative diference (p≥0,05) between two breed. In addition, the parameters L*, a*, and b* were higher values for the “Crioulo Lageano” than Nellore muscle. The final ΔE* range from 3.36 to 7.86 for different muscle studied, confirming a noticeable visual difference between Nellore and “Criolo lageano” muscle. Characterizing the muscle of “Criolo Lageano” shown darker meat than Nellore cattle.