An apple is an edible fruit produced by an apple tree (Malus domestica).
Apple trees are cultivated
worldwide and are the most widely grown species in the genus Malus. The tree originated in Central
Asia, where its wild ancestor, Malus sieversii, is still found today. Apples have been grown for thousands
of years in Asia and Europe and were brought to North America by European colonists. Apples have
religious and mythological significance in many cultures, including Norse, Greek, and European Christian
tradition.
Apples grown from seed tend to be very different from those of the parents, and the resultant fruit
frequently lack desired characteristics. Generally then, apple cultivars are propagated by clonal grafting
onto rootstocks. Apple trees grown without rootstocks tend to be larger and much slower to fruit after
planting. Rootstocks are used to control speed of growth and the size of the resulting tree allowing for
easier harvesting.
There are more than 7,500 known cultivars of apples. Different cultivars are bred for various tastes and
use, including cooking, eating raw and cider production. Trees and fruit are prone to a number of fungal,
bacterial and pest problems, which can be controlled by a number of organic and non-organic means. In
2010, the fruit's genome was sequenced as part of research on disease control and selective breeding in
apple production.
Worldwide production of apples in 2018 was 86 million tonnes, with China accounting for nearly half of
the total.[3]