Comparison of genetic variability between selected populations and primitive populations of six wheat varieties;

Study on the regeneration of Taiwania flousiana Gaussen population and its heterogeneous environmental conditions

[Objective] The research aimed to study the spatial distribution pattern and fractal characteristics of Taiwania flousiana Gaussen population in Leigong Mountain of Guizhou.

Based on the data collected from a standard permanent plot of a primeval Abies georgei var.

By investigating gap generation of virgin fir forest on Mount Sejila, the size and the generation of gaps, relationship between the age and the regeneration of gaps were studied and the qualitative characteristics and the growth up of seedling, young tree and small tree between gaps and non gaps were compared.