Abstract: Materials observed in this investigation by optical microscope weremaintainers(N)and C—versions of three inbreds and twelve restored F_1progenies from four restorers and the C—versions,the results are as follows:The developmental patterns of the anthers in the three C—versionswith different nucle

Key words: C—cytoplasmic male—sterile line, Microspore abortion, Tapetum breakdown,