Abstract:
A set of maize inbreds or cultivars were firstly screened as GLS(Cercospora zeae-maydis)pathogen differential hosts with genetic background which current cultivars shared in China,such as inbreds Shen137,78599-1,Mo17,748,C8605-2,E28,598,Va35,K12 were identified as major ones,and cultivars Shenshi29,Shenshi31,Tiedan9,Yedan13,Dan413,Danyu18,Shennong87,Dongdan54 as affiliated ones.In term of disease rank on differential host,23 GLS strains could be classified into 5 pathogenecity groups through identification at adult stage.The pathogen-grown sorghum grains were used for inoculation into plant whirl.Among pathogenecity types we detected,the pathogenicity typeⅠappeared to be highest virulence to host plants,and pathogenicity type Ⅳ is weak one,pathogenicity types Ⅱ,Ⅲ were in middle place.The pathogenicity type V so far seemed to be difficult to be evaluated in pathogenecity.The result mentioned above provided a sound basis for breeding and identifying resistant cultivars,scientifically planting resistant cultivars in growing areas as well as monitoring of pathogen differentiation.
Key words:
Gray leaf spot pathogen,
Pathogenic differentiation,
Differential host
CLC Number:
WANG Gui-qing, CHEN Jie. Pathogenic Differentiation of Gray Leaf Spot Pathogen in Maize[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2006, 21(3): 100-104. doi: 10.3321/j.issn:1000-7091.2006.03.023.