论文部分内容阅读
目前,在国内外的水稻辐射诱变育种工作中,仍普遍采用辐照种子进行诱变。但一般说来,诱变频率都比较低。近年来不少育种工作者为了提高诱变频率,做了许多理化因素综合处理种子的诱变研究。而有关辐照水稻植株的研究,迄今除在γ圃进行慢性辐照外,在钴室里进行急性辐照的研究还不多。据了解,国内已有不少单位正在进行;在国外,Ken-chi Osone等(1970)曾报道用X射线辐照水稻开花后1—11天植株的M_1效应;Kaneo Adechi等(1974)也报道了用X射线辐照水稻开花当日至7天植株的M_0细胞胚胎学效应。本试验研究的目的是探讨Co~(60)-γ射线辐照水稻胚胎不同发育时期植株的辐射敏感性及适宜剂量,并试图用γ射线辐照水稻植株的方法提高辐射诱变育种的效率。
At present, mutagenesis of irradiated seeds is still widely used in the radiation mutation breeding of rice at home and abroad. But in general, mutagenic frequencies are lower. In recent years, many breeding workers in order to improve the frequency of mutagenesis, a lot of physical and chemical factors to do a comprehensive treatment of seed mutation research. However, there is not much research on the irradiation of rice plants to acute irradiation in the cobalt chamber so far except for the chronic irradiation in the γ-nursery. It is known that there are many units in the country that are in progress. In overseas countries, Ken-chi Osone et al. (1970) reported the M_1 effect of X-ray irradiation on plants 1-11 days after flowering. Kaneo Adechi et al. (1974) The M_0 cell embryo effects of X-ray irradiation on the day 7th day of rice plants were studied. The purpose of this study was to investigate the radiation sensitivity and appropriate dosages of Co ~ (60) -γ-ray irradiated rice embryos at different developmental stages. At the same time, it was tried to improve the efficiency of radiation induced mutation breeding by using γ-rays to irradiate rice plants.