关键词: 辐射育种, 突变体, 花粉, 辐射遗传效应, 不育

Abstract: The budwoods of Hong Maocheng were treated with 5000 roentgen's 60CO——rays. The mutant 4C₂ obtained was seedless. The average number of seeds per fruit decreased by 83.9-88.0% less than the CK in three years. The irregularity of meiotic division of pollen mother of the mutant and the abnormality of the number and behavior of chromosomes cause the unequal distribution of genetic materials in the daughter cells. They became deformed microspore, pollens were highly sterile, and therefore seeds decreased.

Key words: RADIATION BREEDING, MUTANT, POLLEN, GENETIC RADIATION EFFECTS, STERILITY