Inheritance of Aroma of MR365 and Its Use in Hybrid Rice Breeding

The inheritance of aroma of MR365 was studied by crossing MR365 and its derivative aromatc male sterile lines Xiangxiang 2 A, Xingxiang A and Xiangxiang 2 S to non-aromatic lines V20B, V41B, Zhenshan 97B, Minghui 63, etc. Based on the performance of aroma tested by KOH solution method in plants of the generations of F 1, F 2, B 1F 1 and in kernels of F 2 generation, the aroma was controlled by a pair of recessive nuclear genes. In hybrid rice breeding, several aromatic MS lines have been developed from MR365, and a group of hybrid combinations mated with these aromatic MS lines show both high yielding ability and good grain quality with aroma, among which Xiangyou 63, Xingxiangyou 77 and Xingxiangyou 80 have been registered and released to commercial production, and show a very good prospect.