...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plant Pathology >Breakdown of Pl2,a major gene of resistance to apple powdery mildew,in a French experimental orchard
【24h】

Breakdown of Pl2,a major gene of resistance to apple powdery mildew,in a French experimental orchard

机译：在法国的实验果园中，Pl2的分解，Pl2是抵抗苹果白粉病的主要基因

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Pl2,a major resistance gene to powdery mildew originating from Malus zumi,is mainly used in apple-breeding programmes.In an experimental orchard in France,an increase of susceptibility to powdery mildew was observed on apple genotypes carrying Pl2.This increase of susceptibility could not be explained by an effect of the age of the trees,or by an effect of the amount of inoculum on expression of the resistance Pl2.It was demonstrated by tests of patho-genicity in controlled conditions that isolates of Podosphaera leucotricha sampled in this orchard were virulent to Pl2.The appearance of virulent isolates within 6 years after planting apple genotypes selected for the presence of Pl2 resulted in a breakdown of the resistance.Ten years after planting,the percentage of genotypes that were still resistant to powdery mildew varied between 2 and 56%,depending on the progenies.This suggested that additional quantitative resistance genes may influence the durability of the resistance Pl2.
机译：Pl2是源自苹果（Malus zumi）的主要抗白粉病基因，主要用于苹果育种程序。在法国的一个试验果园中，观察到携带Pl2的苹果基因型对白粉病的敏感性增加。不能通过树龄的影响或接种量对抗药性Pl2的表达来解释。通过在受控条件下的病原性测试证明，该果园中分离到的白粉病菌被分离出来。对Pl2具有毒性。在种植后6年内，因存在Pl2而选择的苹果基因型出现了强毒分离株，导致抗药性下降。种植10年后，仍然抗白粉病的基因型百分比在2之间变化。和56％，取决于后代。这表明额外的定量抗性基因可能影响抗性Pl2的持久性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号