[Population equilibrium in tetraploid dioecists]

Based on certain defined assumptions a general model for tetraploid populations with heterosomes is presented. With respect to their heterosomes, an equilibrium is attained in all populations, so that the frequencies of genotypes are dependent on the distribution of sexes in relation to the genotypes (z) and the degree of heterosomy (h). As the equilibrium is reached in only a few generations, natural populations ought to be in a balanced state.