摘要
从江苏11个地区采集的大麦纹枯病病株上分离到92个丝核菌分离物,经菌丝融合测试,分别属于禾谷丝核菌的CAG_1、CAG_4、CAG_5、AGC_1、AGE,以及立枯丝核菌的AG_1—IA,AG_1—IC、AG_(2—1)和AG_5等9个不同的菌丝融合群,各群分离物数依次为76(82、6%)、1、2、4、2、1、1、2和3个。它们在感病大麦品种LEGIA和中抗品种CI3906。1上的致病性反应表明:不同丝核菌种间、不同丝核菌的融合群间、来自不同地区及来自同一品种上的菌株间,其致病性差异达到极显著水平;而同种丝核菌不同融合群间和不同品种间的菌株致病力虽有差异,但不明显;总的来讲,禾谷丝核菌的CAG_1群菌株致病力最强,且分布广泛,其它各群致病力由强到弱的排列顺序为:AG_5、AG_(1-1A)、AGE、AGC_1、CAG_4、AG_(1-1C)、CAG_5和AG_(2-1)。
92 Rhizoctonia isolates causing sharp eyespot of barley were collected from11 areas in Jiangsu province.Based on the anastomosis tests,92 isolates wereidentified as 9 different anastomosis groups of R.cerealis and R.solani,i.e.,CAG_1(76)、CAG_4(1)、CAG_5(2)、AGC_I(4)、AGE(1)、AG_(1-IA)(1)、AG_(1-IC)(1)、AG_(2-1)(2)、and AG_5(3).Two barley culfivars LEGIA and CI3906.1 with differ-ent degrees of resistance were selected as differential cultivars.There weresignificant pathogenetic differences among the isolates of Rhizoctonia species、different anastomosis groups、and the same anastomosis groups or coming fromthe same barley cultivars in different areas and the same area.In one word,the CAG_1 isolate of R.cerealis was virulent and widely distributed,the AG_5isolate of R.solani was less virulent,and the other 7 anastomosis groups werethe least virulent.
出处
《植物病理学报》
CAS
CSCD
北大核心
1993年第1期17-22,共6页
Acta Phytopathologica Sinica
