Abstract
Three experiments investigated the influence on sprout growth of seed tuber specific gravity and the node of origin of the stolon bearing the tuber. Total sprout length per tuber and the number of sprouts per tuber were both significantly affected by tuber specific gravity though these effects were not consistent over all varieties nor from one year to another. Total sprout length and the number of sprouts per tuber increased to node 4 or 5 while specific gravity decreased the further the node of origin of tubers from the parent tuber. This effect of the node of origin on sprout length was not due to tuber specific gravity alone, since it was also apparent with tubers of the same specific gravity grade. It is concluded that some other mediating factor is responsible for the apparent effects on sprout length of the specific gravity and the node of origin of tubers.
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