Different growth habits in the same genetic background were produced by backcross programs to obtain determinate, sp, indeterminate, sp+, jointless, j, and dwarf, d, forms of each of 3 varieties, ‘Gardener,’ ‘Fireball,’ and ‘Cornell 54-149.’ Compared at 2 spacings, 6 × 1.5 ft and 6 × 0.5 ft, indeterminate and jointless plants had larger fruit and higher soluble solids than determinate plants in all varietal backgrounds and at both spacings. The magnitude of the differences varied with varietal background. Dwarf plants produced smaller fruit than non-dwarf plants but with no difference in soluble solids. Closer plant spacings within the row resulted in both smaller size and decreased soluble solids of fruit.
Tomato seeds were treated with three concentrations of 1:2, 3:4-diepoxybutane. Seedling mutations were induced in high amounts with all doses, but other biological effects in the treated generation including delayed germination, chlorophyll-deficiency sectoring in the first true leaves, and failure of plants to bear fruit, were found only with the highest concentration. Neither a lethal nor a partially lethal dose was applied.
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