The apple is the pomaceous fruit of the apple tree, species Malus domestica in the rose family (Rosaceae) and is a perennial. It is one of the
most widely cultivated tree fruits, and the most widely known of the many members of genus Malus that are utilized by humans.
The tree originated in Central Asia, where its wild ancestor is still found today. There are more than 7,500 known cultivars of apples resulting
in a range of desired characteristics. Cultivars vary in their yield and the ultimate size of the tree, even when grown on the same rootstock.
At least 55 million tons of apples were grown worldwide in 2005, with a value of about $10 billion. China produced about 35% of this total.
The United States is the second leading producer, with more than 7.5% of world production. Iran is third, followed by Turkey, Russia, Italy and
India.
There are more than 7,500 known cultivars of apples. Different cultivars are available for temperate and subtropical climates. One large
collection of over 2,100[18] apple cultivars is housed at the National Fruit Collection in England. Most of these cultivars are bred for eating
fresh (dessert apples), though some are cultivated specifically for cooking (cooking apples) or producing cider.
(Wikipedia)