Using cross-breeding as main thread and moleculer markers technique as main means, the heterosis of interspecific hybrid in liriodendron was studied in this dissertation, included choice of parents, Cross-breeding technique, Hybrid identification, physiological foundation and utilization of heterosis, and so on. The main results are as follows:
1. The pollen quality is quite different among L. chinense, L. tulipifera and their interspecific hybrid and individual trees within a species ( or hybri...