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引言葫芦科共包括90个属,750种植物,其中已在世界各地广泛栽培并具有重要经济价值的有黄瓜、西瓜、甜瓜、南瓜、西葫芦、笋瓜等,统称瓜类作物。正像许多作物一样,瓜类也面临着多种病害的威胁。因此,几十年来各国的瓜类育种家和病理学家作出了巨大努力选育抗病品种。经过长期的探寻,人们在瓜类作物和它们的野生近缘种中发现了许多抗病基因,并且利用这些基因不仅培育出了抗单一病害的新品种而且获得了兼抗多种病害的亲本材料和
Introduction Cucurbitaceae includes a total of 90 genera and 750 species of plants. Cucumber, watermelon, melon, pumpkin, zucchini and winter squash, which have been widely cultivated throughout the world and have important economic value, are collectively referred to as melon crops. Just like many crops, melons are also at risk from many diseases. Therefore, for decades, melon breeders and pathologists in various countries have made great efforts to breed resistant varieties. After long-term exploration, many disease-resistance genes have been found in melons and their wild relatives, and these genes have not only been used to breed new varieties resistant to single diseases but also to obtain parental materials resistant to many diseases with