Usually own Wine grapes four to five (rarely six) cores. Seedless or seedless berries are an important quality criterion for table grapes, therefore varieties with this property are bred. Completely seedless berries are a freak of nature due to various environmental conditions. The phenomenon occurs primarily as a consequence of parthenocarpy (Virginity), that means fruit development without previous fertilization. Strictly speaking, these grapes have not only seedless berries, but rather seedless berries. These are also not noticed due to their softness when consumed. In addition to the hereditary disposition, the number, size and nature depend on the temperature during growth.
In commercial grape cultivation, quality-enhancing effects are combined with optimal ones climate additionally through special fertilizers, irrigation and growth-regulating measures achieved. For larger berries gibberellins (Hormones) used. Without these measures, the grapes show defects like bad ones blossom, small berries, late grape ripeness, a neutral meaningless taste, poor wood ripeness, weak fungal tolerance and mushy berry meat. Since increased use of fertilizer From the middle of the 20th century, the proportion of berries with seeds increased, which was increased by the use of Gibberelline.