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of the war in ukraine has been wheat becoming more scarce and more expensive in many countries — because of the disruption to grain from ukraine. but there's also a need for new varieties of wheat better able to cope with disease and climate change. rebecca morelle has more. wheat. in britain, the most momentous harvest of all time. _ it's a crop we've long relied on. wheat being harvested in 19116. theirenemies- are wind and rain. it was the start of a farming revolution, growing only a few varieties chosen to produce as much grain as possible. every ear counts. it's led to a lack of diversity. and today's wheat is coming under intense pressure from climate change and disease. could contain a solution. there are 12,000 specimens