Initially, sugarcane chromosome nomenclature in assemblies was generally based on sorghum. However, because three basic chromosome numbers (x=10, x=9 and, x=8) coexist in Saccharum, we established a new chromosome nomenclature that is no longer sorghum-based but optimizes intra-Saccharum chromosome numbers correspondence.
Reference: D’Hont A, Garsmeur O and Piperidis N. (2023). Sugarcane genome architecture revealed by chromosome-specific probes, implication for chromosome nomenclature. Proceedings of the International Society of Sugarcane Technologists (ISSCT), Volume 31.