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Pathotypes of Cochliobolus sativus on barley in Australia

机译:澳大利亚大麦上Cochliobolus sativus的致病型

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Pathotypes of Cochliobolus sativus have been reported overseas but variation in the Australian population has not been investigated nor have the optimum conditions for the identification of variation been established. Preliminary experiments showed that maximum separation of infection responses of seedlings to infection by C. sativus conidia was obtained at 21degreesC using inocula containing 10(4) conidia/mL and a dew period of 40 h. Under these conditions, the existence of pathotypes in the Australian population of C. sativus was demonstrated. Using 20 lines, six pathotypes were identified among 34 isolates of the fungus. A differential set consisting of 12 barley cultivars is proposed.
机译:国外已报道了Cochliobolus sativus的致病型,但尚未调查澳大利亚人群的变异,也未建立鉴定变异的最佳条件。初步实验表明,使用含10(4)分生孢子/ mL的接种物和40 h的露水期,可在21℃获得最大程度的幼苗感染C. sativus分生孢子的感染反应。在这些条件下,证明了澳大利亚栽培梭菌的致病型存在。使用20个品系,在34个真菌分离株中鉴定出6种致病型。提出了由12个大麦品种组成的差异集。

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