Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 14:587-590 (1974)
© 1974 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Comparison of Selection Methods for Autotetraploids. I. Theoretical1

R. R. Hill, Jr. and W. L. Haag2

The relative effectiveness of selfed progeny test, selfed family, polycross progeny test, polycross family, full-sib family, and individual selection was compared theoretically. Initial gene frequency, level of environmental variance, and level of dominance were variables in the comparisons. The comparisons were based on theoretical changes in gene frequencies with one cycle of selection in two-allele autotetraploid populations that were in random-mating equilibrium.

Theoretical responses with selfed progeny test and selfed family selection were equal and always greater than the other methods. Polycross progeny test selection was the second most effective method, and polycross family selection was the least effective method. Full-sib family and individual selection were intermediate between polycross progeny test and polycross family selection. Fullsib family selection was more effective than individual selection when environmental variance was large, but individual selection was more effective for some gene frequencies when environmental variance was small.

Key Words: Family selection • Mass selection • Progeny test

1 Joint contribution of the ARS, USDA, and The Pennsylvania State University, University Park, PA 16802. Contribution No. 277 of the U.S. Regional Pasture Research Laboratory, ARS, USDA. Authorized for publication as Journal Series No. 4504 by the Pennsylvania Agricultural Experiment Station, University Park. Partial financial support for the junior author was provided by the U.S. Agency for International Development through the 211-d grant to the Agronomy Department of The Pennsylvania State University.

2 Research Agronomist, ARS, USDA, University Park, Pa. and Graduate Research Assistant, The Pennsylvania State University, University Park, Pa. (present address: CIMMYT, Londres 40, Mexico 6, D.F., Mexico), respectively.

Received for publication January 25, 1974.


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M. D. Casler and E. C. Brummer
Theoretical Expected Genetic Gains for Among-and-Within-Family Selection Methods in Perennial Forage Crops
Crop Sci., May 1, 2008; 48(3): 890 - 902.
[Abstract] [Full Text] [PDF]


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Copyright © 1974 by the Crop Science Society of America.