【摘要】 本研究对辐射产生的154个水稻突变体的稻瘟病抗性研究表明:经辐射产生的突变体,有抗病,也有感病。通过筛选,可获得抗病变变体;辐射原始品种不同,抗病突变体出现的频率也不相同。经13个稻瘟病生理小种分别接种鉴定,发现突变体与亲本的抗谱有较大差异。一个抗病突变体的抗性改变后,其它经济性状也有相应的改变。为了获得抗病高产品种,需要在抗病的基础上,加强对其它经济性状的筛选。更多还原

【Abstract】 Eleven rice varieties were treated with ⁸⁰Co gamma ray,lascar and other mutagens.154 mutants with different characters were developed.154 mutants and their parents have been inoculated with blast（Piricularia oryzae）races. It was found that the mutants of disease-resistance could be produced.The disease-resistant mutants with various better characters were selected.Therfre- qUencies of mutation in disease-resistance are different with different parental varieties.After inoculation with 13 blast physiological races,the results showed that the spectrum of resistance of mutants to blast was diferent from orginal varieties.In the mutants,other characters were changed,when one character was changed.In order to get a variety with higher yield and disease- resistance,it is important to take account of other economic charaters.更多还原