Liha töötlemine
gene status (Sather et al. 1990; Leach et al. responses to aging. Some breed differences
1998), ryanodine receptor gene status (Fujii (Nelore, Simmental, Simbrasil) in initial
et al. 1991), diet, antemortem handling postmortem beef tenderness are lost after 7
(Ohene-Adjai et al. 2003), and ultimate pH days of aging (Bianchini et al. 2007).
(Zhu and Brewer 1998). According to Hocquette et al. (2006), cattle
25
26 Chapter 2
of different breeds or different genotypes polymorphisms within the gene for bovine
of the same breed differ primarily in their leptin, a chemical messenger that affects feed
connective tissue characteristics (collagen intake, fatness (fat yield and subcutaneous