Abstract
Abstract Three varieties, ‘Red Top’, ‘Fireball’ and ‘Valiant,’ and their hybrids were grown in a split-plot design of mixed and pure populations at high and low population densities. The frequencies with which varieties or hybrids were selected for earliness and fruit size within high density (1 ft in-row spacing) and low density (3 ft in-row spacing) plots when genotypes were mixed did not differ significantly. Selections for concentrated ripening within the 2 densities were significantly different. The mean response of hybrids to density change was not significant. The mean response of inbreds to density change was significantly different for earliness and fruit size. Fruit size of the inbreds was also affected by competition when grown in mixed stands.
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