Study on Use of Hybrid Vigor for Gingko

Experiments on pollination with gingko pollens collected from different places in Zhejiang or Hubei Province were conducted,then the seeds were collected and seedlings from those seeds were cultivated.The result indicated that the descendants from long-distance pollination showed significant growth dominance over those from domestic pollination. Comparing two-year-old seedlings,the increment of height,diameter of root collar,the number of bud and leaf increased by 28.2%～55.0%,13.2%～18.3%,29.5%～61.8%,41.0%～68.8% respectively.The growth dominance increased also with the distance between pollen sources and receptor trees.The experiment also revealed that the content of ginkgolide in the leaf is hereditable.