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Rice can come in many shapes, colours and sizes. This is a list of rice cultivars, also known as rice varieties.There are several species of grain called rice. [1] Asian rice (Oryza sativa) is most widely known and most widely grown, with two major subspecies (indica and japonica) and over 40,000 varieties. [2]
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IRRI's semi-dwarf varieties, including the famous IR8, [11] saved India from famine in the 1960s. [12] The varieties developed at IRRI, known as IR varieties, are well accepted in many Asian countries. In 2005, it was estimated that 60% of the world's rice area was planted to IRRI-bred rice varieties or their progenies. [13]
Oryza sativa, having the common name Asian cultivated rice, [2] is the much more common of the two rice species cultivated as a cereal, the other species being O. glaberrima, African rice. It was first domesticated in the Yangtze River basin in China 13,500 to 8,200 years ago.
IR8 is a high-yielding semi-dwarf rice variety developed by the International Rice Research Institute (IRRI) in the early 1960s. It was developed by an IRRI team consisting of Peter Jennings, Hank Beachell, Akira Tanaka, T.T. Chang, S.K. De Datta, and Robert Chandler.
He created a high-yielding rice variety IR8 in 1964, based on the previous work by Peter Jennings (no relations to the US journalists). IR8 was officially released by IRRI in 1966. [4] It dramatically increased the yields of Asian rice from 1 or 2 ton per hectare to 4 or 5 tons per hectare. [1] It played a significant part in the Green Revolution.
Japonica rice (Oryza sativa subsp. japonica), sometimes called sinica rice, is one of the two major domestic types of Asian rice varieties. Japonica rice is extensively cultivated and consumed in East Asia, whereas in most other regions indica rice is the dominant type of rice. Japonica rice originated from Central China, where it was first ...