The Middle Yangtze region in China is one place where rice was domesticated: phytolith evidence from the Diaotonghuan Cave, Northern Jiangxi

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Abstract
Rice, Oryza sativa L., is one of the most important cereal crops in the world, and its emergence as a domesticated subsistence plant drives much of the interest and research in archaeology in South and East Asia. The homeland of domesticated rice has been proposed as:1 a specific area, such as India (Vavilov 1926; Ramiah & Ghose 1951), South China (Ding 1957), Southeast Asia (Spencer 1963) and the Yangtze valley in China (Yan 1982; 1989)2 a biogeographic region, such as the so-called ‘belt region’ with a great diversity of Oryza species (Chang 1976), or3 an ecological zone, such as coastal swamp habitats (Higham 1995).