Linkage studies in rice (Oryza sativa L.)

Summary In an intervarietal cross between IR 8 and Wanar 1, inheritance of pigmentation in coleoptile, leaf-sheath, auricle, node, internode, septum and glume was studied. A pleiotropic gene conditioning pigment in all these parts has been identified which may probably be one of the basic genes for anthocyanin pigmentation. A linkage group consisting of genes causing pigment in these seven organs has been indicated in this sequence: Pau-Pc-Pn-Psh-Pin-Pg-Pm. This group may form part of the III Sp group of Misro et al. (1966) (corresponding to the A linkage group of japonica) in which case Pau, Pc, Pn and Pg are additions to this group. Linkage relationship of genes for coleoptile colour is reported for the first time.