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The nature of the purebred-crossbred genetic covariance*

Published online by Cambridge University Press:  14 April 2009

Ronald W. McNew  and
A. E. Bell
A. E. Bell
Affiliation:
Population Genetics Institute, Purdue University, Lafayette, Indiana47907
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Summary

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Epistatic models are examined for conditions which result in a negative covariance between a sire's purebred and test-cross progenies. It is found that heterozygote superiority is not a necessary condition for its occurrence. The frequencies of the same allele in the selected population and in the tester should be divergent. The implications of using the covariance in prediction are discussed. The important result to note is that selection in the crossbred may not be optimum even with a negative covariance.

Type
Research Article
Information
Genetics Research , Volume 18 , Issue 1 , August 1971 , pp. 1 - 7
Copyright
Copyright © Cambridge University Press 1971

References

REFERENCES

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