柑桔果实的种子数是衡量一个品种商品价值高低的重要方面。许多优良品种因种子较多而影响其商品性。目前世界柑桔市场上的一流品种都是无核或近于无核的。因此,采取有效途径培育无核品种是柑桔育种工作的重要任务。为了探明在培育无核柑桔中应用辐射引变的可能性,我们于一九六三年春以大红袍红桔和锦橙干种子为试材,进行~(60)C—γ射线急照 The number of citrus fruits is an important measure of the value of a variety of commodities. Many good breeds affect their merchandising due to more seeds. At present the world’s citrus market, first-class varieties are non-nuclear or near-non-nuclear. Therefore, it is an important task for citrus breeding to take an effective way to cultivate seedless varieties. In order to test the possibility of using radiation to induce nurturing seedless citrus, we conducted an emergency call of ~ (60) C-γ-rays in the spring of 1963 with Dahongpao tangerine and Jincheng dry seeds as test materials