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© Oxford University Press

Computer simulation of selection in a hypothetical crop species

P.L.R. Partner 1,4, M.L. Smith 2, W. Spoor 2 and M.I. Clarkson 3

1Institute of Ecology and Resource Management, University of Edinburgh Edinburgh EH9 3JG. UK
2Crop Science and Technology Department The Scottish Agricultural College Edinburgh EH9 3JG. UK
3Computer Services Unit, The Scottish Agricultural College Edinburgh EH9 3JG. UK

1To whom offprint requests should be sent

A computer simulation model demonstrating the effect of directional selection upon a simplified quantitative genetic character, is presented. Complementary homozygous parents were crossed to generate a filly heterozygous F1 population. Phenolypic truncation selection was effected upon the F2 and subsequent generations, and genotypic and phenolypic response to selection, as well as the change in population heterozygosizy, was monitored to generation F9 The model simulates selection for alternative breeding regimes, modes of allelic interaction, selection pressure, population size and levels of environmental variation. Three alternative methods for the simulation of the environmental component of phenozypic variance are incorporated, and mechanisms and relative merits of the rival methods are discussed. Data generated by the model confonned closely to theoretical expectation, lending support to the use of the model as a platform for development of more comprehensive simulation models. Potential improvements to the model are discussed.

Received on February 8, 1993; accepted on May 5, 1993

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