Abstract Three ‘Red Delicious,' Malus domestica Borkhausen (Rosales: Rosaceae), apple plantings, each representing a different sport, were evaluated for natural resistance against the obliquebanded leafroller (OBLR), Choristoneura rosaceana (Harris). The establishment of neonate larvae on apple foliage was not different between the three ‘Red Delicious' plantings. Of the three ‘Red Delicious' plantings, the one that most negatively impacted OBLR was the ‘It Delicious' genotype. The ‘It Delicious' genotype at the Sunrise Research Orchard exhibited essentially 100% mortality against OBLR when fed on spring and summer foliage, and mortality accumulated faster across instars than on other ‘Red Delicious' plantings. The high mortality observed in the ‘It Delicious' genotype points to the existence of a putative gene, which we propose as Cro1. The other ‘Red Delicious' plantings, Columbia River Orchard and Tree Fruit Research and Extension Center Research Orchard treatments, showed negative impacts, especially when exposed to foliage from the summer compared to the spring period. Development rates in these treatments in spring were higher compared to summer, and there were direct relationships between development rates, pupal weights, and adult longevity for both males and females. These latter results suggest that sublethal effects could be present in these ‘Red Delicious’ cultivars, thus offering insights to a gene-pyramiding strategy for breeders to managing leafroller pests in Washington apple.

中文翻译：

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嵌合芽运动“美味”（红色）突变株，它表达对斜带卷叶虫（鳞翅目：Tortricidae）的致命效果抵抗

摘要 对三种“红色美味”苹果树（蔷薇科：蔷薇科）苹果种植体，分别代表不同的运动进行了评估，评估了它们对斜带卷叶草 (OBLR) Choristoneura rosaceana (Harris) 的天然抵抗力。三种'Red Delicious' 种植在苹果叶子上的新生幼虫的建立没有差异。在三种“Red Delicious”种植中，对 OBLR 影响最大的是“It Delicious”基因型。Sunrise Research Orchard 的“It Delicious”基因型在以春季和夏季叶子为食时，对 OBLR 的死亡率基本上为 100%，并且与其他“Red Delicious”种植相比，整个龄期的死亡率累积得更快。在“It Delicious”基因型中观察到的高死亡率表明存在一个推定的基因，我们建议将其作为 Cro1。其他“Red Delicious”种植，哥伦比亚河果园和果树研究与推广中心研究果园处理，显示出负面影响，尤其是与春季相比，夏季暴露于树叶时。与夏季相比，这些处理在春季的发育率更高，并且雄性和女性的发育率、蛹重量和成虫寿命之间存在直接关系。后面的这些结果表明，这些“红色美味”品种中可能存在亚致死效应，从而为育种者管理华盛顿苹果卷叶病害虫的基因金字塔策略提供了见解。表现出负面影响，尤其是与春季相比，夏季暴露在树叶下时。与夏季相比，这些处理在春季的发育率更高，并且雄性和女性的发育率、蛹重量和成虫寿命之间存在直接关系。后面的这些结果表明，这些“红色美味”品种中可能存在亚致死效应，从而为育种者管理华盛顿苹果卷叶害虫的基因金字塔策略提供了见解。表现出负面影响，尤其是与春季相比，夏季暴露在树叶下时。与夏季相比，这些处理在春季的发育率更高，并且雄性和雌性的发育率、蛹重量和成虫寿命之间存在直接关系。后面的这些结果表明，这些“红色美味”品种中可能存在亚致死效应，从而为育种者管理华盛顿苹果卷叶病害虫的基因金字塔策略提供了见解。