Another approach to determine the RN phenotype was
developed by Josell et al. (2000), who used visual and nearinfrared
spectroscopy (NIR) through a fiber-optic probe to differentiate
between phenotypes. The combined effect of high
glycogen and low protein content in the meat was consid-ered to make it possible. The NIR measurements could be
performed already 30 min. post mortem. Only four non-carriers
were misclassified as carriers of the RN- allele, which gave
4% misclassified samples in total. In comparison with the
analysis of glucose and glucose-6-phosphate in meat juice,
the NIR method can be performed early post-mortem