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Returns from genetic improvement in dairy cattle over a twenty year horizon

  • J.E. Pryce (a1), G. Simm (a1), P.R. Amer (a2), M.P. Coffey (a1) and A.W Stott (a3)...

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Genetic improvement is permanent and cumulative. Improvements made in one generation are passed onto the next. In the UK two selection indexes are currently available to the dairy industry, they are PIN (Profit Index; production only) and £PLI (Profitable Lifetime Index; production plus lifespan). Much of the current and anticipated index research and development will be on broader breeding goals that include health and fertility traits. Economic responses expected for PIN and £PLI over a 20 year period were calculated in addition to a hypothetical index where it was assumed that PTAs (predicted transmitting abilities) for mastitis (M) and calving interval (CI) were available (£PLI+M+CI).

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Brotherstone, S, Veerkamp, R. F., Hill, W.G. 1997. Genetic parameters for a simple predictor of the lifespan of Holstein- Friesian dairy cattle and its relationship to production. Animal Science 65: 3137.
Pryce, J.E., Veerkamp, R.F., Simm, G. 1998. Expected correlated responses to selection on production in dairy cattle. Proceedings of the 6th World Congress on Genetics Applied to Livestock Production 23: 383386.
Robertson, A. and Rendel, J.M. 1950. The use of progeny testing with artificial insemination in dairy cattle. Journal of Genetics 50: 2131.
Smith, C. 1978. The effect of inflation and form of investment on the estimated value of genetic improvement in farm livestock. Animal Production 26: 101110.

Returns from genetic improvement in dairy cattle over a twenty year horizon

  • J.E. Pryce (a1), G. Simm (a1), P.R. Amer (a2), M.P. Coffey (a1) and A.W Stott (a3)...

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