Watermelon may be a global success story, but its breeding reality is increasingly defined by pressure: climate volatility, rising disease incidence, evolving virus threats, and fewer crop protection tools available to growers.
At the same time, many key traits in watermelon such as sweetness stability, yield consistency, earliness and quality under stress, are polygenic and heavily influenced by the environment. Add the crop’s relatively narrow genetic diversity, and the job becomes a long-term balancing act: improving resilience and resistance without sacrificing flavour, colour, texture and shelf life.
Few breeders speak about climate change as an abstract future scenario. It’s already here, and it is already rewriting what “normal conditions” mean.
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Jovan Djordjevic, watermelon breeder at Murray River Seed Co. … describes climate pressure in direct, practical terms: heat waves, water stress, storms and erratic production windows are now realities across growing regions worldwide.
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Megan Calvert, seedless watermelon breeder at Bayer, describes how her programme tests material in some of the most challenging areas in the world to ensure released varieties perform consistently and adapt to multiple environments.
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On the question of molecular techniques, several breeders are unambiguous: they are essential.
