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甘薯为我国四大粮食作物之一,也是饲料和轻工业的重要原料,目前全国种植面积600万hm~2,因此,提高甘薯单位面积产量对发展我国农业生产,振兴农村经济具有重要意义。 甘薯是无性繁殖作物,体内病毒的积累可使品种种性退化,品质和产量降低,对甘薯生产造成严重危害。据调查,病毒病在我国每年造成的鲜薯产量损失在200亿kg以上。此外,病毒病还导致甘薯商品率和出于率明显降低。鉴于国内外迄今尚无育出高抗病毒病的实用甘薯品种,
Sweet potato is one of the four major grain crops in China and an important raw material for feed and light industry. Currently, the planting area is 6 million hm ~ 2. Therefore, increasing the yield per unit area of sweet potato is of great significance for the development of agricultural production and the revitalization of rural economy. Sweet potato is a vegetative propagation crop, the accumulation of virus in the body can degenerate variety, reduce quality and yield, and cause serious harm to sweet potato production. According to the survey, the annual incidence of fresh virus caused by virus disease in China is more than 20 billion kg. In addition, the virus disease also led to a significant reduction in sweet potato product rate and out of rate. In view of the fact that so far no practical sweetpotato varieties with high resistance to virus diseases have been raised at home and abroad,