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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]
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.
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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]
Altered grain quality: it will be difficult to achieve the flavor and cooking properties of traditional rice varieties. And there are thousands of local varieties with unique properties. Choosing from among the possible quality goals and then achieving them is a "formidable challenge" [35] for all rice breeding programs.
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Basmati rice has a typical pandan-like (Pandanus amaryllifolius leaf) flavour caused by the aroma compound 2-acetyl-1-pyrroline. [31] Basmati grains contain about 0.09 ppm of this aromatic chemical compound naturally, a level that is about 12 times as much as non-basmati rice varieties, giving basmati its distinctive fragrance and flavour. [32]