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Coordinated immune, chloroplast and chemical defences underpin multilayered resistance to barley yellow dwarf virus and its aphid vector associated with the Hordeum bulbosum-derived Ryd4 introgression in barley

Amma L. Simon Dasuni P. Jayaweera Ilma A. Qonaah Daniel Verburg F. Clarke Dong-Hyun Kim Benjamin Urquhart James P.E. Melichar Tom C. B. Giles Toby J. A. Bruce Rumiana V. Ray

Jul 2026 · bioRxiv · 0 citations · 35 references

Biology

TL;DR

It is demonstrated that the Ryd4 introgression coordinates constitutive vector deterrence with host defence reprogramming to restrict aphid colonisation and suppress BYDV establishment, providing a mechanistic framework for improving durable resistance to aphid-transmitted viruses in cereals.

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