“…Early research on mixtures and CCPs has occasionally found inconclusive results with regard to the effects of genetic diversity on yield stability (Hockett et al, 1983), or even lower yield stability in mixtures than in monocultures (Clay and Allard, 1969). However, most studies found a yield-stabilizing effect of cultivar mixtures (Frey and Maldonado, 1967;Wolfe, 1985;Dubin and Wolfe, 1994;Mundt, 2002) and composite cross populations (Soliman and Allard, 1991) in cereal crops, in agreement with our results.…”