There are many varieties of grapes, there are about 8,000 kinds in the world, China has more than 700 kinds.

According to the different geographical distribution, the true grape subgenus various can be divided into three populations: ?

One, the Eurasian population?

The species with the highest cultivation value is widely distributed all over the world. This species can be divided into two subspecies: wild paratype forest grapes and cultivated types. Eurasian species of grapes are less resistant to cold, susceptible to fungal diseases, not resistant to phylloxera, more resistant to lime, in terms of drought resistance, salt resistance and adaptability to the soil, there are differences between the different varieties.?

II. North American populations?

Including 28 species, only a few species are utilized in production and breeding, mostly strong vines, growing in the forests, river valleys in eastern North America. Species commonly used in cultivation and breeding are: ?

(a) American grape wild in the southeastern United States and southern Canada. Cold resistance is strong, can withstand -30 ℃, disease resistance is moderate, the production of more cultivation is the species and Eurasian species of grapes of natural hybrid varieties of Isabella, Konko, Kataba, etc.. Among them, Konko is a famous variety of excellent red grape juice production.

(2) riverbank grapes native to eastern North America, cold resistance, can withstand -30 ℃, resistance to fungal diseases and phylloxera ability is very strong, in breeding in the main use of it to cultivate phylloxera-resistant rootstock. Riverbank grapes and American grape hybrid varieties Beda can be used as cold-resistant rootstock.

Three, East Asian populations

Including more than 39 species, growing in China, North Korea, Japan, the former Soviet Union, the Far East and other places in the forests, mountains, river valleys and coastal side. About 30 species grow in China, with abundant varieties and types, and are mainly used as rootstocks, ornamental trees, and as seed material for breeding.

Expanded Information:

Nutritional Value of Grapes:

Nutritional Composition of Grapes Grapes are not only flavorful and delicious, but also have a high nutritional value. Mature berries of grapes contain up to 10-30% sugar, mainly glucose. A variety of fruit acids in grapes help digestion, and eating more grapes appropriately can strengthen the stomach and stomach.

Grapes contain minerals calcium, potassium, phosphorus, iron and a variety of vitamins B1, vitamin B2, vitamin B6, vitamin C and vitamin P, etc., but also contains a variety of amino acids needed by the human body, eating grapes on neurasthenia, fatigue is very beneficial.

Research has found that grapes are better than aspirin to stop the formation of blood clots, and can reduce the level of human serum cholesterol, reduce platelet cohesion, the prevention of cardiovascular and cerebrovascular disease has a certain role.

Consuming the right amount of fresh grapes every day will not only reduce the risk of cardiovascular disease, but also particularly beneficial to those with localized ischemic heart disease and atherosclerotic heart disease. The flavonoids in fresh grapes can "clean" the blood and prevent the formation of cholesterol plaque. The more black the grapes are, the more flavonoids they contain

Baidu Encyclopedia - Grapes