Fig. 1. Probability that 10 rare alleles will be retained after 10 regeneration cycles using four mating systems: chain cross (a), paired cross without reciprocal (b), random pollen pollination (c), and self-pollination (d). The initial population consists of 100 individuals, in which two alleles have frequency 0.01, two have frequency 0.02, two have frequency 0.03, two have frequency 0.04, and two have frequency 0.05. The strategies are denoted by the sample size (50 or 100 plants) and the number of seeds taken from each plant (1, 2, 5, or 10).