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美国西北部山区,是夏凉地区,作物生长季节短,普通早熟番茄品种,往往在早霜到来时还不能成熟,使番茄生产受到限制。为了培育适应当地生产的品种,为了培育适应
The mountainous area in the northwestern United States is a summer cool area where crop growth season is short. Ordinary early-maturing tomato varieties often fail to mature when the early frost comes, which limits the production of tomato. In order to cultivate varieties adapted to local production, in order to cultivate adaptation