Discovering mechanisms of plant–virus–vector interactions is fundamental to understand their ecology and evolution and to apply this knowledge in plant protection. To study the influence of varying Barley yellow dwarf virus (BYDV) transmission efficiencies on host plant preference of Rhopalosiphum padi (L.) clones, we performed host choice experiments with two barley cultivars (BYDV susceptible cv. ‘Rubina’ and BYDV tolerant cv. ‘Vixen’) including healthy and virus-infected plants. For the susceptible barley cultivar ‘Rubina’, aphid clone R07 (high transmission efficiency) preferred BYDV-infected over healthy host plants after 24 h, while clones D10 (medium transmission efficiency) and R09 (low transmission efficiency) preferred neither host. In contrast, BYDV infection of ‘Vixen’ did not affect the plant’s appeal for aphid clone R07. Host plant access, indicated by ingestion and observed by electrical penetration graph technique for a period of 2 h, was facilitated on BYDV-infected cv. ‘Rubina’ for the clones R07 and D10, whereas an opposite effect was observed for the clone R09. For R07 and R09, the difference was not visible after a period of 5 h. As observed earlier for BYDV-infected wheat, enhanced emission of volatile organic compounds associated with virus-induced attraction was detected for BYDV-infected cv. ‘Rubina.’ It is concluded that host plant preference is possibly linked with a high BYDV transmission efficiency as observed for the clone R07, leading to a fitness advantage of this clone as indicated by early increased ingestion. This advantage is not present on BYDV-tolerant genotypes most likely due to the absence of infection symptoms.

发现植物-病毒-载体相互作用的机制对于理解其生态学和进化并将这种知识应用于植物保护至关重要。为了研究不同的影响，大麦黄矮病毒（BYDV）上的寄主植物偏好的传输效率，禾谷缢（L.）克隆，我们用两个大麦品种（健康和病毒感染的植物）对两个大麦品种（BYDV易感品种“ Rubina”和BYDV耐性品种“ Vixen”）进行了宿主选择实验。对于易感的大麦品种“ Rubina”，蚜虫克隆R07（高传播效率）在24小时后比BYDV感染要优先于健康宿主植物，而克隆D10（中等传播效率）和R09（低传播效率）都不是宿主。相反，BYDV感染“ Vixen”并没有影响该植物对蚜虫克隆R07的吸引力。通过摄食表明并通过电渗透图技术观察到的寄主植物进入2 h的时间，对BYDV感染的cv有促进作用。克隆R07和D10的“橡胶”，而克隆R09则观察到相反的效果。对于R07和R09，5小时后看不到差异。正如之前对BYDV感染的小麦所观察到的，对于BYDV感染的cv，检测到与病毒引起的吸引力相关的挥发性有机化合物的排放增加。“鲁比纳。” 结论是，如对克隆R07所观察到的，寄主植物的偏爱可能与BYDV的高传递效率有关，这导致该克隆的适应性优势，如早期摄入增加所表明。由于没有感染症状，最有可能对BYDV耐受的基因型没有这种优势。结论是，如对克隆R07观察到的，寄主植物的偏爱可能与BYDV的高传递效率有关，如早期摄入增加所表明，该克隆具有适应性优势。由于没有感染症状，最有可能对BYDV耐受的基因型没有这种优势。结论是，如对克隆R07所观察到的，寄主植物的偏爱可能与BYDV的高传递效率有关，这导致该克隆的适应性优势，如早期摄入增加所表明的。由于没有感染症状，最有可能对BYDV耐受的基因型没有这种优势。