Abstract Insect pests can reduce wheat yield by direct feeding and transmission of plant viruses. Here we report results from laboratory and field phenotyping studies on a wide range of wheat, including landraces from the Watkins collection deriving from before the green revolution, more modern cultivars from the Gediflux collection (north‐western Europe) and modern UK Elite varieties, for resistance to the bird cherry‐oat aphid, Rhopalosiphum padi (Homoptera: Aphididae) and the English grain aphid, Sitobion avenae (Homoptera: Aphididae). A total of 338 lines were screened for R. padi and 340 lines for S. avenae. Field trials were also conducted on 122 Watkins lines to identify wheat bulb fly, Delia coarctata, preference on these landraces. Considerable variation was shown in insect performance among and within different wheat collections, with reduced susceptibility in a number of varieties, but phenotyping did not identify strong resistance to aphids or wheat bulb fly. Field trials showed within collection differences in aphid performance, with fewer aphids populating lines from the Watkins collection. This differs from development data in laboratory bioassays and suggests that there is a pre‐alighting cue deterring aphid settlement and demonstrates differences in aphid preference and performance on older plants in the field compared with seedlings in the laboratory, highlighting the need for phenotyping for aphid resistance at different plant growth stages. No association was identified between performance of the different insect species on individual varieties, potentially suggesting different nutritional requirements or resistance mechanisms.

中文翻译：

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在历史悠久的 Watkins 和 Gediflux 小麦系列中寻找小麦对蚜虫和小麦鳞茎蝇的抗性

摘要 害虫可通过直接取食和传播植物病毒来降低小麦产量。在这里，我们报告了对各种小麦的实验室和田间表型研究结果，包括源自绿色革命之前沃特金斯系列的地方品种、来自 Gediflux 系列（西北欧）和现代英国精英品种的更多现代品种对鸟樱桃燕麦蚜虫 Rhopalosiphum padi（同翅目：蚜科）和英国谷物蚜虫 Sitobion avenae（同翅目：蚜科）的抗性。总共筛选了 338 条稻田鼠系和 340 条麦角链虫。还对 122 条沃特金斯品系进行了田间试验，以确定小麦鳞茎蝇 Delia coarctata 对这些地方品种的偏好。不同小麦收集品之间和内部的昆虫表现表现出相当大的差异，许多品种的易感性降低，但表型分析并未发现对蚜虫或小麦球蝇的强抗性。田间试验表明，不同品种的蚜虫表现存在差异，来自 Watkins 品种的蚜虫数量较少。这与实验室生物测定中的开发数据不同，并表明存在阻止蚜虫定居的预兆线索，并表明与实验室中的幼苗相比，田间老植物的蚜虫偏好和表现存在差异，突出了对蚜虫抗性进行表型分析的必要性在不同的植物生长阶段。没有发现不同昆虫物种对单个品种的表现之间存在关联，这可能表明不同的营养需求或抗性机制。