柑桔有性杂交育种是柑桔育种中应用最为广泛而有效的途径。浙江科学院柑桔研究所是国内最早开展柑桔杂交育种的单位之一,已陆续选育出一批杂种优系。优系236(红玉柑)就是以黄岩原产柑桔良种本地早为母本,用刘勤光甜橙交本地早的杂种“刘本橙”为父本回交的桔橙杂种新优系。根据山地构头橙砧的成年脐橙和本地早中间砧高接的优系“236”初结果树的观察, Sexual cross breeding of citrus is the most widely used and effective way in citrus breeding. Citrus Institute of Zhejiang Academy of Sciences is the earliest citrus hybrid breeding one of the units have been bred a number of hybrid system. You 236 (red mandarin orange) is a new line of orange-orange hybrids backcrossed with yellow mandarin elite as early as the female parent back with Liu Qinguang sweet orange to the local early hybrid “Liu Ben orange”. According to the observation results of the early result tree “236” that the adult navel orange with the mountain antelope anvil and the local early middle anvil were connected,