Oryza sativa indicates that rice domestication likely began before 5000 BC, but that most sites in China from which rice remains have been recovered are younger than 5000 BC. Rice begins to be cultivated in South Asia from as early as 5000 BC. Wild rice appeared in the Belan and Ganges valley regions of northern India as early as 4530 BC and 5440 BC, respectively, J.Bates et al.(2016) found early domestication process of rice in ancient South Asia was based around the wild species "Oryza nivara". This led to the local development of a mix of 'wetland' and 'dryland' agriculture of local
Plant genome assembly products were used to clone remaining gaps, and YACs allowed the characterization of telomere sequences. The resulting sequenced regions were 115.4 Mb of the 125 Mb predicted size of the genome and a total of 25,498 of protein-coding genes. To sequence and assemble the genome of Oryza Sativa (japonica), the same strategy was used. For Oryza Sativa a total of 3,401 mapped clones in a minimum tiling path were selected from the physical map and assembled. One of the most important crops in the world, maize (Zea mays), is the last plant genome project primarily based on Sanger BAC-by-BAC strategy.