一、前言 枳(Poncirus trifoliate)是宽皮柑桔优良砧木,以枳嫁接的橙类具有矮化、早结、优质的性状,但在华南地区以枳作甜橙的砧木有不同程度的黄化现象。过去研究枳砧甜橙的砧穗组合与黄化关系者较多,阐明不同橙类品种与枳砧关系的报道较少。为探索不同橙类品种对枳砧的亲和性,作者收集了国内外橙类品种共75个,比较其对枳砧的 I. Introduction Poncirus trifoliate is an excellent rootstock of broad-leaved citrus. Oranges grafted with trifoliate orange have dwarfing, early-knot and high-quality traits. However, yellow rootstocks with citrus aurantium in South China have different degrees of yellowing phenomenon. In the past, the relationship between antivirals of scion rootstock and yellowing was more than that of orange, which indicated that there were few reports on the relationship between different orange varieties and scion. In order to explore the affinity of different orange varieties for the lotus root, the author collected a total of 75 varieties of oranges at home and abroad,