禾草对禾顶囊壳玉米变种的抗病性研究

利用人工接菌方法测定了10种草坪禾草,包括多年生黑麦草、高羊茅、紫羊茅、中华结缕草、硬羊茅、草地早熟禾、加拿大早熟禾、匍匐剪股颖、细弱剪股颖、狗牙根;13种禾本科牧草,包括一年生黑麦草、鸭茅、碱茅、扁穗冰草、沙生冰草、披碱草、老芒麦、杂交小米草、猫尾草、弯叶画眉草、无芒雀麦、百喜草、苏丹草;以及4种禾本科作物,包括燕麦、甜高粱、小麦、玉米对禾顶囊壳玉米变种的抗病性。结果表明,多数供试禾草对其具有免疫能力,多年生黑麦草、一年生黑麦草、草地早熟禾、小麦高度抗侵染;无芒雀麦和玉米具有中等程度的抗侵染能力,但抗侵入能力较差;高粱属的苏丹草和甜高粱中度感病,属于中感作物。多年生黑麦草和草地早熟禾品种间存在着抗病性差异,有免疫品种和高抗品种。

Evaluation of resistance in grasses to Gaeumannomyces graminis var. maydis

Resistance of turf-grasses,forages and crops to Ggm were evaluated using PDA disks containing the pathogen mycelium.The tested turf-grasses,including Poa compress,Festuca arundinacea,F.ovina,F.rubra,Agrostis tenuis,A.palstriss,Cynodon dactylon,Zoysia japonica,were immune to the pathogen Ggm,while Lolium perenne and P.pratensis were highly resistant.There were differences in resistance of cultivars of these two species.Gramineous forages,including Dactylis glomerata,Puccinellia distans,Agropyron cristatum,A.desertorum,Elymus dahuricus,E.sibiricus,Euphrasia sp.,Phleum pratense,Eragrositis curvula,and Paspalum notatum,were immune to the pathogen.L.multiflorum was highly resistant,Bromus inermis was moderately resistant and Sorghum sudanense was susceptible.Four crops,Avena sativa,Triticum aestivum,Zea mays,and S.vulgare,were immune,highly resistant,moderately resistant and highly susceptible to Ggm,respectively.