中文摘要：

awned 米饭(Oryza sativa ) 带一个微小的额外的染色体的植物在 telotrisomic 线 2n+4L 的子孙之中被发现。在用特定的用绳子拖的平底渡船克隆的染色体的 situ 杂交(鱼) 的荧光表明这个额外的染色体是从染色体 4 的长手臂的部分导出的一个戒指染色体。aneuploidy 植物因此因此作为 2n+4L 戒指被说出。我们没在戒指染色体上检测任何勉强拼凑成的东西鱼信号，并且发现瑞斯(CRR ) 的仅仅 centromeric 探查 Centromeric Retrotransposon 与在 immunodetection 以后由顺序的鱼揭示了的着丝点特定的 histone CENH3 是 co 局部性的。额外的戒指染色体在成熟分裂期间展出了一个唯一的分离模式，包括没有在戒指染色体和正常之间配对在前期期间的染色体 4 我和在后期的姐妹染色单体的分离前我。

英文摘要：

An awned rice（Oryza sativa） plant carrying a tiny extra chromosome was discovered among the progeny of a telotrisomic line 2nt4L. Fluorescence in situ hybridization（FISH） using chromosome specific BAC clones revealed that this extra chromosome was a ring chromosome derived from part of the long arm of chromosome 4. So the aneuploidy plant was accordingly named as 2nt4L ring. We did not detect any Cent O FISH signals on the ring chromosome, and found only the centromeric probe Centromeric Retrotransposon of Rice（CRR） was co-localized with the centromere-specific histone CENH3 as revealed by sequential FISH after immunodetection. The extra ring chromosome exhibited a unique segregation pattern during meiosis, including no pairing between the ring chromosome and normal chromosome 4during prophase I and pre-separation of sister chromatids at anaphase I.