“…Currently, virus isolates have been detected on seeds, screening propagation materials or other parts mostly via electron microscopy, immunological diagnosis such as enzyme-linked immunosorbent assay, molecular diagnosis such as restriction fragment length polymorphism, thermostable amplification-based methods, isothermal amplification methods, nucleic acid sequence hybridization techniques and next-generation sequencing, with genetic information carried via nucleic acid and microarray (Lima et al 2014;Yadav and Khurana 2016). Consequently, assays based on RT-PCR methods were established to detect Narcissus latent virus (NLV), NYSV and NMV in culture fields (Berniak et al 2013;Hori et al 2013).…”