Enza Zaden identifies a gene providing high levels of resistance against ToBRFV

High level resistance ToBRFV virus

We have achieved a major breakthrough in the fight against the highly contagious tomato virus ToBRFV that threatens grower livelihoods and the agri-food industry worldwide.

Our tomato breeding team identified a gene providing high levels of resistance against the devastating ToBRFV.

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What is ToBRFV?

Tomato Brown Rugose Fruit Virus (ToBRFV) is a plant virus in the genus “Tobamovirus”. Since it was first discovered in Israel in 2014, the Tomato Brown Rugose Fruit Virus (ToBRFV) has spread to parts of Europe, America, Asia and Africa, and continues to easily spread via mechanical transmission. Symptoms on the fruits include yellow spots, wrinkled patches and brown scars that render the crop unsellable.

Press release ToBRFV

First trials confirm HR to ToBRFV

Excellent results of the first trials with high resistance varieties: "We see no symptoms at all in the plantes, while the disease pressure is very high."

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Why HR resistance to ToBRFV is so important

This resistance to ToBRFV virus will improve the revenue of the growers and secure the supply of healthy food to consumers (tomato as one of the most popular vegetables).

Infographic: IR (intermediate reistance) and HR (high resistance) explained
IR and HR explained
Our tomato breeding team identified a gene providing high levels of resistance against the devastating ToBRFV. In this infographic we explain the difference between IR (intermediate resistance) and HR (high resistance).
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Left: tomato,plants infected with toBRFV - Right: HR resistant tomato planttomato

What's the difference between IR & HR?

In short: HR is superior to IR.

Two levels of resistance are defined:

I. High resistance (HR): Plant varieties that highly restrict the growth and development of the specified pest or pathogen under normal pest or pathogen pressure when compared to susceptible varieties. These plant varieties may, however, exhibit some symptoms or damage under heavy pest or pathogen pressure.

II. Intermediate resistance (IR): Plant varieties that restrict the growth and development of the specified pest or pathogen, but may exhibit a greater range of symptoms or damage compared to highly resistant varieties. Intermediately resistant plant varieties will still show less severe symptoms or damage than susceptible plant varieties when grown under similar environmental conditions and/or pest or pathogen pressure.

Q&A ToBRFV
Find all the questions and answers about ToBRFV.
Q&A ToBRFV

Will you introduce this resistance globally?

YES!

We will introduce this HR resistance to ToBRFV worldwide. Enza Zaden is a globally active company providing innovative varieties and solutions to customers all over the globe.

Press on HR ToBRFV
Publication overview about our breakthrough discovery: a gen that provides HR to ToBRFV
Publication overview on our discovery
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The developments for tomato varieties including this resistance, continue. Please leave your contact details if you want to be the first to know about further developments regarding HR resistance ToBRFV.
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Discovery video
Watch our video on the quest to the discovery of the gen that provides HR to ToBRFV, a devastating tomato disease.
Watch the video