果树开花时,如果用别的品种的花粉进行授粉后,所结果实的种子繁育成的子代,往往产生变异,这就是常说的“有性杂交”,已是果树生产工作者所共知.可是在当代母本树上所结果实的果形上,也会受到父本花粉的影响而产生变异,这叫“花粉直感效应”.近年来,我们在对“菊水”梨品种进行人工授粉时,就观察到这一现象.“菊水” Fruit trees at flowering, if pollen with other varieties of pollination, the resulting seed breeding into progeny, often produce variation, which is often said that “sexual cross”, is already known to fruit tree producers However, on the fruit shape of the contemporary mother tree, it will also be affected by the pollen of the male parent to produce variation, which is called the “pollen direct effect.” In recent years, we conducted artificial pollination on “Kikusui” pear variety This phenomenon is observed. “Kikusui”