银杏杂种优势利用研究初报

Study on Use of Hybrid Vigor for Gingko

杂种优势是生物界的普遍规律。从对现有栽植银杏（ＧｉｎｋｇｏｂｉｌｏｂａＬ．）的调查发现，同一批种子繁育的银杏单株间，总有少许表现明显区别于多数植株。它们长势旺，生长快，种核大，核形指数也明显偏离该群体的平均值。这些植株很可能是远距离花粉授粉产生的后代...

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.