Seedless fruits

Many plants form viable interspecific crosses. Often these are sterile, which results in seedless fruits. Seedless varieties must either be hybrids of seed-producing parents or propagated vegetatively. Sometimes breeders use colchicine to induce polyploidy, resulting in a sexually reproducing interspecific hybrid with a double chromosome complement. 

Other common fruits are also good sources of lycopene that represents 87 to 95% of the total carotenoid content in several seeded and seedless watermelon cultivars," ° 56 to 66% in different papaya cultivars, and 24 to 58% in pink grapefruits (Table 4.2.3). 

Exploratory studies indicate that 64 mature Valencia oranges per sample, when picked in a consistent manner with 16 fruits from each of 4 randomized normal trees, suffice to give fair (10%) agreement between replicates such a sample ordinarily weighs from 18 to 24 pounds. Very cursory tests with Thompson seedless grapes demonstrate... 

ITO, T., MEYEROWITZ, E.M., Overexpression of a gene encoding a cytochrome P450, CYP78A9, induces large and seedless fruit in Arabidopsis, Plant Cell, 2000, 12, 1541-1550. 

Two varieties of limes are of importance in the commercial production of lime oils the West Indian (Mexican or Key) lime. Citrus aurantifolia (Christm.) Swingle and the Persian (Tahiti) lime, C. latifolia Tanaka. The former has small fruits with many seeds, and the latter bears larger, seedless fruits. West Indian limes are grown primarily in Mexico, the West Indies, and Peru Persian limes are cultivated in Florida and Brazil. 

Effect of GAl9 GA2, GAs, and GAU on Black Corinth and Thompson Seedless Fruit... 

The major Florida grapefruit varieties are the nearly seedless Marsh white and allied pigmented forms, such as Marsh Pink, Thompson and Ruby Red, and the seedy Duncan. Differences in flavor between the nearly seedless and seedy varieties are not large, however, the consensus of the author and others familiar with both types is that seedy fruit possess a somewhat fuller, more balanced grapefruit flavor than seedless. 

Post-Prohibition. The repeal of Prohibition found eastern viticulture, what there was left of it, in deep depression. Unlike California, it was not helped by the huge grape deal directed at home winemakers and it had lost much of the fresh fruit market to Thompson Seedless, Flame Tokay, and Emperor from the Central Valley, short on flavor but long on shipability. 

Citrus latifolia Tanaka Persian or Tahiti Lime (large, seedless fruits)... 

Effect of trialkylamines on carotene content of the flavedo of Marsh seedless grapefruit (yg/g dry wt) Postharvest treatment of fruits, and method of isolation and identification of pigments are described in reference 12. A portion of ground flavedo was dried in vacuo at 65 C to obtain the dry wt. 

The term "table grape" is used to distinguish fruit that is destined to be eaten fresh rather than to be dried or made into wine. Of course, any ripe grape can be eaten fresh, but over the centuries there has been selection of varieties that were seedless on the one hand and that were larger berried, firmer fleshed and with more attractive colors on the other hand. Selection for attractive color has been paralleled by selection of large size. We find thus that quality attributes in table grapes can be considered from two categories, the visual and the palate. Visual factors of obvious importance to quality in table fruit are size, color, shape, and intact bloom on the berries. 

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