叶子花辐照诱发突变育种的研究

THE STUDY OF RADIATION INDUCED BREEDING IN BOUGAINVILLEA

本研究于1985～1988年,用^(60)Coγ射线诱发重瓣叶子花突变,选育新的花色品种。试验结果表明,辐照剂量为3KR和3.5KR处理的发根插条,在VM_1代均获得不同花色突变株,其中3 KR处理的出现一株分别有鲜红和橙黄色的变异,突变率为0.74％;3.5KR处理的出现两株分别为橙黄色和红黄嵌合花色变异,突变率为1.64％。通过无性繁植,已从VM_1代突变株分离纯化出两个花色各具特点的突变系,分别编号为“85-1”和“85-2”。经继代繁殖到VM_3代,表现性状稳定,花期特长,花色艳丽,具有较好的观赏价值,目前正在加速繁育推广应用。

This experiment lasted from 1985 to 1988. Mutants of Bougainvillea spectabilis induced with 60Co γ rays were used for selecting new varieties of different colors.The results indicated that root-sprouting cuttings, treated with a radiation dose of 3KR and 3.5KR, produced mutants of various colors in the VM1 generation. Cuttings treated with 3KR brought about a mutant from which a scarlet and an orange-yellow colored flowers grew, itsmutation rate being 0.74%. Two other mutants, with orange-yellow and red-yellow flowers respectively, emerged from the 3.5KR treated cuttings, rate 1.64%.Through vegetative reproduction, two mutant strains. each with its own features and colors, were segragated and cloned from the VM3 generation mutants and were named 85-1 and 85-2 respectively.The new varieties reproduced to the VM3 generation, exhibiting a long blossoming period, stable characters, unique colors as well as a high appreciation value. All these varieties are being propagated and popularized now.