Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-23T06:58:12.734Z Has data issue: false hasContentIssue false
  • English
  • Français

Estimation of economic values for selection indices†

Published online by Cambridge University Press:  02 September 2010

Bryan E. Melton ,
Earl O. Heady  and
Richard L. Willham
Bryan E. Melton
Affiliation:
Iowa State University, Ames, Iowa 50011, USA
Earl O. Heady
Affiliation:
Iowa State University, Ames, Iowa 50011, USA
Richard L. Willham
Affiliation:
Iowa State University, Ames, Iowa 50011, USA
Get access

Abstract

A procedure to estimate economic values for use in selection indices is developed. A profit function is specified and a production function that links output to the several inputs developed. The profit function is maximized by equating the partial derivatives of the function with respect to each input to zero and simultaneously solving the resulting system of first-order equations for optimal levels of the variables. These variables include economic values for animal traits and levels of exogenous, producer-supplied inputs. The economic values are then used in a selection index. The resulting index value is therefore determined by the average values of the traits, the available inputs and their prices, output price and the specified production function. The procedure has the flexibility, through varying these parameters, to provide index solutions that are tailored to suit individual production conditions. A numerical example is provided.

Type
Research Article
Information
Animal Production , Volume 28 , Issue 3 , June 1979 , pp. 279 - 286
Copyright
Copyright © British Society of Animal Science 1979

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Anderson, J. R., Dillon, J. L. and Hardaker, B. 1977. Agricultural Decision Analysis. Iowa State University, Ames, Iowa.Google Scholar
Dickerson, G. E., Kunzi, N., Cundiff, L. V., Koch, R. M., Arthaud, V. H. and Gregory, K. E. 1974. Selection criteria for efficient beef production. J. Anitn. Sci. 39: 659–673.Google Scholar
Gregory, K. E., Swiger, L. A., Sumption, L. J., Ingalls, J. E., Rowden, W. W. and Rothlisberger, J. A. 1966a. Heterosis effects on growth rate and feed efficiency of beef steers. J. Anitn. Sci. 25: 290–298.Google Scholar
Gregory, K. E., Swiger, L. A., Sumption, L. J., Ingalls, J. E., Rowden, W. W. and Rothlisberger, J. A. 1966b. Heterosis effects on carcass traits of beef steers. J.Anim. Sci. 25: 311–322.CrossRefGoogle Scholar
Harris, D. L. 1970. Breeding for efficiency in livestock production: Defining the economic objective. J. Anim. Sci. 30: 860–865.Google Scholar
Hazel, L. N. 1943. The genetic basis for construction selection indexes. Genetics, Princeton 28: 476–490.Google Scholar
Heady, E. O. and Dillon, J. L. 1961. Agricultural Production Functions. Iowa State Press, Ames, Iowa.Google Scholar
Ladd, G. W. and Martin, M. B. 1976. Demands for input characteristics. Am. J. Agric. Econ. 58: 21.CrossRefGoogle Scholar
Melton, B. E., Heady, E. O., Willham, R. L. and Hoffman, M. P. 1978. The input of alternative objectives on feedlot rations for beef steers. Am. J. Agric. Econ. 60: 683–688.Google Scholar
Moav, R. 1973. Economic evaluation of genetic differences. In Agricultural Genetics: Selected Topics (ed. Moav, R.). John Wiley and Sons, New York.Google Scholar
Moav, R. and Hill, W. G. 1966. Specialised sire and dam lines. IV. Selection within lines. Anim. Prod. 8: 375–390.Google Scholar
Moav, R. and Moav, J. 1966. Profit in a broiler enterprise as a function of egg production of parent stocks and growth rate of their progeny. Br. Poult. Sci. 7: 5–15.Google Scholar
Smith, C. 1964. The use of specialised sire and dam lines in selection for meat production. Anim. Prod. 6: 337–344.Google Scholar
Stigler, G. J. 1966. The Theory of Price. The Macmillan Co., New York, N.Y.Google Scholar