Edible tuberous root of the sweet potato vine grown widely in warm regions of the United States.
甘薯蔓生植物的可食用的块根，广泛生长在美国的温暖地区。
The mainly substance in tuberous root in sweet potato is starch. How to improve the content of starch in tuberous root is one of important tasks in sweet potato breeding.
甘薯块根中的主要贮藏物质为淀粉，如何提高甘薯淀粉含量与质量是当前国内外甘薯品质育种的三大主攻方向之一。
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