Summary
The genetic variance among random-mated lines derived from backcrossing (BCgS1 lines) depends upon the backcross generation (g) and the number (n) of BCgF1 plants crossed in generations 1 through g. There is little effect of n on genetic variance for n > 6. The genetic variance among BCgF2-derived lines is greater than that among BCgS1 lines for all g. If either BCgF2-derived or BCgS1 lines are used as a base population for recurrent selection, 8, 16, 32, and 64 BC1F1, BC2F1, BC3F1, and BC4F1 plants, respectively, should be used to avoid loss of donor alleles to drift.
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References
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Joint contribution of USDA-ARS and Journal Paper No. J-11224 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa. Project No. 2471
Formerly Research Geneticist, USDA-ARS, Ames, Iowa, USA
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Cox, T.S. Genetic variance and drift in selfed and intermated populations derived from backcrossing. Theoret. Appl. Genetics 68, 183–186 (1984). https://doi.org/10.1007/BF00252336
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DOI: https://doi.org/10.1007/BF00252336