A PRACTICE AND THEORY FOR BREEDING MAINTAINER LINE OF MALE STERILITY OF WILD RICE WITH ABORTIVE POLLEN

In order to breed the new male sterile line of wild rice with abortive pollen, four mordels for breeding maintainer line of male sterile were designed and carried out by us recently, i.e. maintainer crossed with maintainer; maintainer crossed with restoring variety with minor gene, maintainer crossed with restorer and maintainer crossed with hybrid rice(F1). The results indicated that some new maintainers which possess significant value were got in every combinition, and were reproduced and used in backcross with the old male sterile lines. At the same time, the materials of pollen fertility were examined under microscope and the data were calculated. The result also showed that the fertility and sterility were controlled by two pairs of genes and it was preliminary identified that the restoring ability between strong restoring genes and minor restoring genes were qualitative different.