Complete sequencing of the 124-kb rice chromosome 4 centromere revealed that it consisted of eighteen tracts of 379 tandemly arrayed repeats known as CentO and a total of nineteen centromeric retroelements (CRs) but no unique sequences were detected.

• 水稻第四号染色体着丝粒的124kb完整序列,是由379个串联重复的CentO卫星组成的18个片段和19个着丝粒逆转座元件组成,没有发现其它特异性序列。