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首页> 外文期刊>Acta Horticulturae >Different host reactions can involve field resistance of plum genotypes to plum pox virus
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Different host reactions can involve field resistance of plum genotypes to plum pox virus

机译：不同的宿主反应可能涉及李子基因型对李子痘病毒的田间抗性

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Plum genotypes remaining healthy under natural conditions despite a high infection pressure can be designated as field resistant. Mechanisms resulting in this trait may be different and can be due to a defence to the vector as well as to the virus.Different types of resistance to plum pox potyvirus (PPV) were detected after graft inoculation in plums. They can be connected with field resistance so far as the defence mechanisms of the host genotype are directed against the virus. Among 45 plum genotypes investigated over 8 years in Germany, 22 (=48.9%) were field resistant. Experimentally infected trees of the same genotypes reacted as partially resistant. Graft-infected genotypes evaluated as highly resistant or immune and hypersensitive, were also field resistant and virus-free. However, genotypes assessed as moderately resistant or highly susceptible after graft infection were mostly field susceptible. It is suggested that experimental testing of plum genotypes for PPV resistance should be checked under natural conditions with a high infection pressure for a longer time.
机译：尽管感染压力很高，但在自然条件下仍保持健康的李子基因型可被指定为田间抗药性。导致该性状的机制可能不同，可能是由于对载体以及病毒的防御作用。在李子中进行嫁接接种后，发现了对李子痘病毒的不同类型的抗性。只要宿主基因型的防御机制针对病毒，它们就可以与野外抗性联系起来。在德国进行了8年调查的45种李子基因型中，有22种（= 48.9％）具有田间抗药性。具有相同基因型的实验感染树木反应为部分耐药。被评估为高度抗性或免疫和超敏性的嫁接感染基因型也具有田间抗性和无病毒性。但是，在移植物感染后被评估为中等抵抗力或高度易感的基因型大多是现场易感的。建议对李子基因型的PPV抗性进行实验测试应在较高感染压力的自然条件下进行较长时间的检查。

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