Rice has the smallest genome and was the first to be sequenced among cereals. Both the indica andjaponica genome have been sequenced and published by separate group in 2002 (Yu J et al. 2002 and Goff SA et al. 2002). The indica genome is 420 Mb in size and contains 32,000 to 50,000 genes, whilejaponica is larger, at 466 Mb, and contains around 46,022 to 55,615 genes.
International Rice Genome Sequencing Project (IRGSP) was established to map the japonica rice genome. The IRGSP adopted the "clone-by-clone shotgun sequencing strategy" so that each specific position on the genetic map was associated with a sequenced clone. In December 2004, the completed rice genome sequence was made available through the NCBI database.
Beijing Genomics Institute chose to sequence Oryza sativa ssp. indica, the major rice subspecies cultivated in China and many other Asian-pacific regions. BGI's sequencing project was initiated in May 2000, and used 93-11, a cultivar of Oryza sativa L. ssp. indica, as target material. Draft of the 93-11 genome sequence was completed in October 2001 and published in Science 296: 79-92, 2003 which is available at Rice Information System.
- Goff SA, et al. (2002) A draft sequence of the rice genome (Oryza sativa L. ssp. japonica).Science. 296(5565):92-100.
- Yu J, et al. (2002) A draft sequence of the rice genome (Oryza sativa L. ssp. indica). Science.296(5565):79-92.