Israel’s TomaTech has a range of tomato varieties with intermediate resistance to the brown rugose fruit virus (ToBRFV) that is ruining 50% of global tomato crops (see here for another Israeli-developed variety). TomaTech has now filed a patent for the DNA markers that identify high resistance traits.
http://www.fruitnet.com/eurofruit/article/185176/tomatech-cracks-code-for-tobrfv-resistance