Where is rice native to?

Oryza. sativa was recovered from a grave at Susa in Iran (dated to the 1st century AD) at one end of the ancient world, another domestication of rice in South Asia. Today, the majority of all rice produced comes from China, India, Indonesia, Pakistan, Bangladesh, Vietnam, Thailand, Myanmar, Philippines, and Japan.

Oryza sativa was domesticated from the wild grass Oryza rufipogon roughly 10,000–14,000 years ago. The two main subspecies of rice – indica (prevalent in tropical regions) and japonica (prevalent in the subtropical and temperate regions of East Asia) – are not believed to have been derived from independent domestication events. Another cultivated species, O. glaberrima, was domesticated much later in West Africa.

Recent genetic evidence show that all forms of Asian rice, both indica and japonica, come from a single domestication event that occurred 8,200–13,500 years ago in the Pearl River valley region of China.

In China, extensive archeological evidence points to the middle Yangtze and upper Huai rivers as the two earliest places of O. sativa cultivation in the country. Rice and farming implements dating back at least 8,000 years have been found. Cultivation spread down these rivers over the following 2,000 years.

Credit:http://ricepedia.org/culture/history-of-rice-cultivation