１９７８年在杂交育种时将哈姆林×路比血橙授粉后 ９８～ １１２天的幼胚进行离体培养，获得 ３株移栽田间成活的组培植株，高接后已开花结果多年。１９９５年经同工酶分析并结合多年来对植株形态特征的观察和果实理化性状分析，证明其中两株是哈姆林甜橙的珠心植株。１９９２ In 1978, the immature embryos of Hamlin × Road 98 ~ 112 days after blood orange pollination were cultured in vitro, and 3 tissue culture plants which were transplanted in field were obtained. 1995 isozyme analysis and combined with many years of plant morphology and physical and chemical properties of the fruit analysis showed that two of them are Hamlin sweet orange pear heart plant. 1992