柑桔有性杂交育种,是当前国内外用以创造柑桔新品种的重要而广阔的途径。 十九世纪末,美国的Swingle和Webber二氏,以甜橙、葡萄柚、柑类为中心,进行杂交,育出了奥兰多(Crlando))、明尼奥拉(Minneola)、西米诺尔(Siminole)等优良品种。本世纪六十年代,Swingle氏的后代,用桔柚与克力曼丁回交,获得鲁滨逊、诺瓦桔、Sunburst等新品种。意大利用马罗桔柚和克力曼丁同地中海柑杂交, Sexual cross breeding of citrus is an important and broad way to create new citrus varieties at home and abroad. At the end of the nineteenth century, Swingle and Webber II in the United States conducted crosses with sweet oranges, grapefruits and oranges as the center, breed Crlando, Minneola, Siminole, And other fine varieties. The sixties of this century, Swingle’s offspring, with citron pomelo and cremamandin backcross, access to Robinson, Nova, Sunburst and other new varieties. Italy with Marlo orange grapefruit and Cretan mandarin cross with the Mediterranean,