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Seedless grapes are divided into white, red and black types based roughly on fruit color. The most popular seedless grape is known in the United States as 'Thompson Seedless', but was originally known as 'Sultana'. It is believed to be of ancient origin. It is considered a white grape, but is actually a pale green.
In North America, the most common grape juice is purple and made from Concord grapes, while white grape juice is commonly made from Niagara grapes, both of which are varieties of native American grapes, a different species from European wine grapes. In California, Sultana (known there as Thompson Seedless) grapes are sometimes diverted from the ...
The ability to produce seedless fruit when pollination is unsuccessful may be an advantage to a plant because it provides food for the plant's seed dispersers. Without a fruit crop, the seed dispersing animals may starve or migrate. In some plants, pollination or another stimulation is required for parthenocarpy, termed stimulative parthenocarpy.
These elongated seedless grapes, also called Sweet Sapphires, were bred by International Fruit Genetics, a California-based fruit breeding and patenting company, and launched in 2004.
When fertilization does not occur, seedless grapes are formed, which are sought after for the production of raisins. Regardless of pollination and fertilization, most plants will produce around 100 to 200 grapes. [14] The skin of the grape accounts for 5 to 20% of the total weight of a grape depending on the variety. [15]
The seedless plant combines male sterility in the pepper plant (commonly occurring) with the ability to set seedless fruits (a natural fruit-setting without fertilization). In male sterile plants, the parthenocarpy expresses itself only sporadically on the plant with deformed fruits.
In the US, most raisins, including those with the typical dark brown color, are made from the sultana grape, the Thompson Seedless. The term "sultana" refers to golden-colored dried grapes, which may also be called "golden raisins" (such as marketed by Sun-Maid, a California-based raisin grape growers' co-op and legacy brand). Any grape may be ...
The fruit is a berry, known as a grape that is ovoid or globular, dark blue or greenish, usually 2-locular with 5 seeds; in the wild species it is 6 mm (0.24 in) diameter and ripens dark purple to blackish with a pale wax bloom; in cultivated plants it is usually much larger, up to 3 cm (1.2 in) long, and can be green, red, or purple (black).
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related to: are seedless grapes natural or synthetic products of plants are known as animal