The swollen culm of Zizania latifolia induced by a smut fungus Ustilago esculenta is used as a vegetable in China.During the cultivation of Z. latifolia-U. esculenta associations,some of them escape from the infection of U. esculenta(as control plant),some may produce swollen culms containing mature,pigmented teliospores when infected by sporidial(T)strains of the fungus,and some produce the normal swollen culms when infected by mycelia-sporidial(M-T)strains.In this study,Z. latifolia (cv.‘Zhejiao No.2’,a d...