水稻耐低钾基因型筛选的研究

Studies on Screening Rice Tolerant Genotypes Tolerant to Low-K +

试验证明，水培筛选杂交稻和粳稻耐低钾基因型是可行的，筛选的适宜时期分别为八叶期和五叶期，适宜Ｋ＋浓度分别为３ｍｇ／Ｌ和１０ｍｇ／Ｌ；

In this paper,the author found that we could screen rice genotypes tolerant to low-K + by using solution culture at seedling stage. The optimun screening periods of O.indica and O. japonica were eight-leaf and five-leaf, respectively; and the optimun screening concentration of solution culture for O.indica and O.japonica were 3mg/L and 10mg/L,respectively. The main difference between rice genotypes tolerant and sensitive to low-K + lies in the ability of absorbing nonexch K + The fomer has stronger ability of absorbing nonexch. K + and better K +utilization efficiency (KUE) than the latter.