An Analysis of the Dynamic Relationship Among the Quality Characters of Brassica napus L Comparative analysis of agronomic and qualitative characters in different lines of Dendrobium denneanum Analysis of some quality characteristics in soybean mutants Correlations between Rice Grain Shapes and Main Qualitative Characteristics The Relationship between Qualitative Characters and Orientational Parameters of Cotton Fiber(Ⅱ) Qualitative characteristics and classification study on commodity specification and grade standard of Panax notoginseng Breeding of new varieties "Zhongchai No. 2" and "Zhongchai No. 3" of Bupleurum chinense