Fig. 1. Cumulative frequency distributions of GD_(P1,O) for F₂–, BC₁–, and BC₂–derived progenies based on simulated data assuming GD_(P1,P2) = 0. Type I () and Type II (ß) errors refer to a threshold of GD = 0.37 for discriminating F₂– vs. BC₁–derived progeny lines.