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叶籽银杏是银杏这一孑遗物种的特殊种质,长期以来国内外学者对其实生和营养繁殖的后代叶生胚珠(叶生种实)的表达十分关注。该研究首次发现,从800年生的叶籽银杏母树上采集接穗嫁接12年后有6株幼树出现叶生胚珠并发育成正常叶生种实,这也是世界上仅有的6株幼龄叶籽银杏。叶籽银杏表达株率占9.68%,平均叶生种实率为0.074%。嫁接再生的叶籽银杏形态特征、种实特性、生长特性、变异特性与母树相同,表明叶籽银杏可视为一个品种,并具有稳定的遗传特性。
Ginkgo biloba is a special germplasm of the relict species of Ginkgo biloba. For a long time, domestic and foreign scholars have paid close attention to the expression of the oviparous ovules (leaf stumps) of their living and vegetative propagation. This study, for the first time, found that six saplings emerged from the 800-year-old Ginkgo biloba tree after harvesting of the scion and developed into normal leaf-gnarled seedlings, the only 6-year-old leaf seed in the world ginkgo. Leaf ginkgo plants accounted for 9.68% of the total strains, the average leaf stump seed rate was 0.074%. Grafted regenerated leaves Ginkgo biloba morphological characteristics, seed characteristics, growth characteristics, variation characteristics and the same parent tree, indicating that the seed ginkgo can be considered as a variety, and has a stable genetic characteristics.