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A note on muscle composition and colour of Holstein-Friesian, Piedmontese × Holstein-Friesian and Romagnola × Holstein-Friesian steers.
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2009
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note on muscle comp.pdf
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M.G. Keane and P. Allen. A note on muscle composition and colour of Holstein-Friesian, Piedmontese × Holstein-Friesian and Romagnola × Holstein-Friesian steers. Irish Journal of Agricultural and Food Research 48: 103–108, 2009
Abstract
Holstein-Friesian (HF), Piedmontese × Holstein-Friesian (PM) and Romagnola ×
Holstein-Friesian (RO) steers were compared for muscle composition and colour. A
total of 120 steers in a 3 breed types (HF, PM and RO) × 2 feeding levels (low and
high) × 2 finishing periods (short, S and extended, E) factorial experiment were used.
Three samples of m. longissimus were taken for chemical analysis, measurement of drip
loss and Hunterlab colour measurements. Muscle moisture and protein concentrations
were lower, and lipid concentration was higher for HF than for PM and RO, which were
similar. There were no effects of feeding level on chemical composition, but after blooming
all colour values except hue were lower for the higher feeding level. The E finishing
period reduced moisture, protein, drip-loss, L (lightness), a (redness) and chroma
values. It is concluded that PM and RO had similar muscle composition but HF had
a higher lipid concentration. Feeding level had few effects on muscle composition, but
extended finishing increased all measures of fatness and reduced colour values.