Update on HR-ToBRFV tomatoes

Update on HR-ToBRFV tomatoes

One year after our announcement of the discovery of the HR gene to ToBRFV: what has happened in the past year? Where are we now? And what is yet to come? 

Watch our latest video below.

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Find all the questions and answers about ToBRFV.

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 plants, while the disease pressure is very high."

Read & download press release

Why is HR resistance to ToBRFV 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).

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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What's the difference between IR & HR?

In short: HR is superior to IR.

Two levels of resistance are defined:

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.

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.

Find all the questions and answers about ToBRFV.

Will you introduce the HR to ToBRFV resistance globally?


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.

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Discovery video

Watch our video on the discovery of the gene that provides HR resistance to ToBRFV.

Watch the video