USDA-ARS, Agronomy Department, Kansas State University, 66506, Manhattan, KS, USA.
Theor Appl Genet. 1984 May;68(1-2):183-6. doi: 10.1007/BF00252336.
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.
来自回交（BCgS1 系）的随机交配系的遗传方差取决于回交世代（g）和在第 1 到 g 世代中杂交的 BCgF1 植物的数量（n）。对于 n > 6，n 对遗传方差的影响很小。对于所有 g，BCgF2 衍生系的遗传方差大于 BCgS1 系的遗传方差。如果将 BCgF2 衍生系或 BCgS1 系用作反复选择的基础群体，则应分别使用 8、16、32 和 64 个 BC1F1、BC2F1、BC3F1 和 BC4F1 植物，以避免供体等位基因因漂移而丢失。
