Skip to navigation Skip to content

Potyvirus resistance in Phureja potatoes

The aphid transmitted potyviruses (potato viruses Y, A and V) can spread readily during the growing season since application of insecticides to control vector aphids does not effectively control spread of these viruses (which are acquired and transmitted in seconds).

The most effective potyvirus control can only be achieved by the deployment of resistant cultivars. Genes that confer extreme resistance to PVY or hypersensitive resistance to PVY, PVA and PVV have been identified. Of the two, extreme resistance is most effective but such genes have not been mapped for PVA or PVV and many commercial cultivars lack adequate levels of potyvirus resistance.

In this project we are investigating extreme resistance to potyviruses found in the Institute long-day-adapted population of diploid Solanum tuberosum Group Phureja (the Phureja core collection). In a collaborative project with geneticists we aim to map and clone the gene (or genes) responsible for and investigate the molecular mechanisms of resistance.

Host resistance can be affected adversely by abiotic stresses such as high temperatures. The resistance we have identified is known to lose function at temperatures of 28°C and research is ongoing to study the underlying mechanisms of R gene temperature sensitivity, and to identify alleles that function at higher temperatures. This work is allied to the overall Cell and Molecular Sciences group effort on research into biotic/abiotic stress in potato.

Research

Areas of Interest


Printed from /research/groups/cell-and-molecular-sciences/virus-research/virus-resistance/potyvirus-resistance-phureja-potatoes on 16/10/18 01:09:38 AM

The James Hutton Research Institute is the result of the merger in April 2011 of MLURI and SCRI. This merger formed a new powerhouse for research into food, land use, and climate change.