秋水仙碱诱发玉米变异特性的追踪研究

Study on Variation Specificity of Maize Induced by Colchicine

对秋水仙碱诱发产生的5种玉米变异材料,在自交2年后,进行了变异特性的追踪检测。结果显示:不同来源的玉米变异材料,其发芽势提高了3%～46%,玉米根尖分生区细胞直径减小了6%～15%,同时分生区细胞核直径则增大了5%～18%,玉米根尖分生区细胞染色体数目变异率达25.25%～38.55%,且染色体数目变异范围主要在10～30条之间。其中,供试玉米No.1和No.16根尖细胞染色体条数趋向大于20条方向变异,其余供试材料则变异方向不明显。

After two years continuous self-pollination,the variated specificities of five kinds of variations of maize induced by colchicine were examined and measured.Experiments show that germination potential increased 3%～46%,cell diameter of root tip meristem region is 6%～15% less than original material,meanwhile,nucleus diameter increased 5%～18%,percentage of chromosome variation is 25.25%～38.35% in root tip meristem region,but variation range is mainly in 10～30 piece.However,chromosome numbers tend to be more than 20 in root tip of maize No.1 and No.16,the other material variation trend is unobvious.