The flowers were pretreated by (A) emasculating then bagging, (B) removal of stigma and (C) crosspollination, respectively as compared with control: open-pollination after emasculation.

去雄套袋、截去柱头以破坏授粉和杂交授粉等处理与去雄不套袋作对照之间结实率的差异不显著。