The economic values (EV) of production traits, rennet coagulation time (RCT, min), and curd firmness (a30, mm) were derived for Italian Holstein-Friesian dairy cattle, based on the Grana Padano cheese industry. Three different sets of EV for RCT and a30 were estimated, assuming +2.5% (scenario 1), +5% (scenario 2) and +10% (scenario 3) increments in cheese yield due to the effect of milk coagulation properties (MCP). A profit equation based on a linear model was developed to simulate the transformation of milk into Grana Padano cheese. The EV of RCT were -2.18, -4.36, and -8.71 Euro/min for scenarios 1, 2, and 3, respectively, and +0.86, +1.73, and +3.45 Euro/mm for a30, respectively. Relative emphasis of traits in the breeding objectives for Italian Holstein-Friesian dairy cattle population should account for the effect of MCP on cheese yield.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Genetic Improvement Programs: Breeding objectives, economics of selection schemes, and advances in selection theory (Posters), , 403, 2014
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