Cl             Clustered spikelets (chr.6, Jodon 1957, Nagao & Takahashi 1963)
ri              verticillate rachis (chr.5, Nagao & Takahashi 1963)
Ur-1         Undulate rachis-1 (chr.6, Nagao & Takahastii 1963, Sato & Shinjo 1991)
ur-2           undulate rachis-2 (chr.B,Iwata et al. 1983)