SEEDLESSNESS IN VEGETABLES
Most commercially produced seedless fruits have been developed from plants whose fruits normally contain numerous relatively large hard seeds distributed throughout the flesh of the fruit.
Common varieties of seedless fruits include watermelons, tomatoes, grapes (such as Termarina rossa), and bananas. Additionally, there are numerous seedless citrus fruits, such as oranges, lemons and limes.
The term “seedless fruit” is biologically somewhat contradictory in terms of ripened ovary definition.
Seedless fruits can develop in one of two ways:
Fruit development involves pollination, but the ovules or embryos abort without producing mature seed.
Seedless banana and watermelon fruits are produced on triploid plants, whose three sets of chromosomes make it very unlikely for meiosis to produce fertile gametes. This is because one of the three copies of each chromosome can’t pair with another appropriate chromosome before separating into daughter cells
These plants are generally propagated vegetative from cuttings, by grafting, or in the case of bananas, from “pups” (offsets). In such cases the resulting plants are genetically identical clones. By contrast, seedless watermelons are grown from seeds. These seeds are produced by crossing diploid and tetraploid lines of watermelon, with the resulting seeds producing sterile triploid plants. Fruit development is triggered by pollination, so these plants must be grown alongside a diploid strain to provide pollen.
Seedlessness natural or induced allows growers to produce crops in covered horticulture without the need of pollinizer. Early crop harvest is possible as the biological process is skipped which consume time. Seedless vegetables proven more shelf life and appeal of consumer, as it is easy to consume. Processing of vegetables is more economical and easy.
One disadvantage of most seedless crops is a significant reduction in the amount of genetic diversity in the species. As genetically identical clones, a pest or disease that affects one individual is likely capable of affecting each of its clones. For example, the vast majority of commercially produced bananas are cloned from a single source, the Cavendish cultivar, and those plants are currently threatened worldwide by a newly discovered fungal disease to which they are highly susceptible.Seedless vegetables like cucumber is sometime mis shape, softer than normal. Seedless crop production reduces the chances of expressions of traits exposed by the regular crosses.