There are two cultivated and twenty wild species of genus Oryza. These wild species of Oryza with 2n=24 or 48 chromosomes representing AA, BB, CC, BBCC, CCDD, EE, FF, GG and HHJJ genomes are an important reservoir of useful genes.

• 稻属有 2 2个种 ,包括 2 0个野生稻种和 2个栽培稻种 ,现已命名AA、BB、CC、BBCC、CCDD、EE、FF、GG和HHJJ9个基因组。