普通西瓜经过秋水仙素处理后,由二倍体变成四倍体.然后再授以普通西瓜的花粉,结下的西瓜籽,下年种就变成了三倍体无籽西瓜了。一、用药的浓度与方法 1.浸泡法。选饱满西瓜籽,嗑开种脐,用0.2%秋水仙素溶液浸泡。浸种前先用凉水浸泡5～6小时,搓去种皮上的粘液物,用凉开水洗三次。用40瓦灯泡照5小时,保持温度18～22℃;然 Ordinary watermelon after colchicine treatment, the diploid into tetraploids and then granted ordinary watermelon pollen, watermelon seeds, the next year became a triploid seedless watermelon. First, the concentration and method of drug 1. Immersion method. Select full watermelon seeds, 嗑 open umbilicus, with 0.2% colchicine solution soak. Soak with soaked in cold water for 5 to 6 hours before soaking, rubbing to the mucus on the seed coat, washed three times with cold water. With 40-watt bulb according to 5 hours, keep the temperature 18 ~ 22 ℃;