Lamb steaks from semimembranosus (SM) and longissimus thoracis et lumborum (LTL) muscles were allocated to
three different packaging treatments — Darfresh® vacuum skin packaging (VSP), Darfresh® Bloom packaging
(80% O2:20% CO2; Hi-Ox-DB) or high oxygen modified atmosphere packaging (80% O2:20% CO2; Hi-Ox-MAP) — and
stored in simulated retail display for 5 or 10 days and then subjected to consumer sensory and chemical analyses.
Hi-Ox-MAP and Hi-Ox-DB samples had lower tenderness, flavor, juiciness and overall liking scores and
higher TBARS values, compared to VSP. Hi-Ox-MAP samples deteriorated in juiciness and flavor between 5 and
10 days. Hi-Ox-MAP LTL samples had a lower myofibrillar fragmentation index, consistent with reduced proteolysis,
although desmin proteolysis and desmin and troponin-T cross-linking were not influenced by packaging. The LTL
exhibited greater desmin degradation and reduced desmin cross-linking relative to the SM, supporting the higher
tenderness scores in this muscle. Direct packaging of lamb into retail ready VSP may provide the sheepmeat industry
with greater flexibility while increasing consumer satisfaction.