摘要： 首先对玉米细胞质雄性不育系JnA进行小斑病菌接种鉴定，同时对其花药、花粉形态观察，通过恢保关系鉴定，F₂育性分离观察及F₁花粉碘液染色镜检，初步确定JnA属于S组细胞质雄性不育。从JnA×；恢313的F₂出现少量不育株和半恢株的情况看，JnA的不育性的恢复既受主基因控制，又受微效多基因作用。细胞学显微观察发现JnA的败育时期发生在单核晚期至二核花粉期，败育发生与绒毡层解体异常有关。同时对JnA在生产上利用的可行性作了初步研究。

关键词: 玉米, 细胞质雄性不育, JnA, 分组, 利用

Abstract: Inoculation of leaf on Helminthosporium Maydis Nisk and observation of anther and pollen and fertility restoration-retention identification indicated that JnA should be classified into group S of cytoplamic male sterility.At the same time,fertility observation of F₂ and microscopy identification of F₁ pollen through I-KI dyeing confirmed this conclusion.Several sterile plants and halfrestore plants were found in F₂ of JnA×Hui 313,which indicated that restoration of sterile character of JnA was controlled by main effect gene and micro-effect polygene.Through the study for cytology of JnA,JnA aborted at late microspore stage to 2-celled pollen stage.Abortion was related to abnormal split of tapetum.At the same time,feasibility for application of JnA in production was also studied.

Key words: Zea may L, Cytoplasmic male sterility, JnA, Classification, Application

中图分类号: 

• S513.03