Petunia cultivar Menghuan was used to observe the meiosis of pollen mother cell and formation of male gametophyte.The results showed that: seven rod or ring bivalents could be observed in diakinesis.

• 摘要以矮牵牛品种梦幻为材料，对花粉母细胞减数分裂和雄配子形成进行细胞学观察，结果表明：终变期有7个二价体，有棒状和环状构型。