Endopolyploidization Phenomenon of Chinese Cabbage (Brassica rapa ssp. pekinensis) Karyotypes and C-values of Two Plantago Species from the QinghaiTibet Plateau, China Correlation Analysis between Genome Size and Seed Characteristics in Poaceae Plants Primary Study on Evolutional Correlation Analysis between the Plant C-Values and 1000-seed Weight of Different Genera in Pinaceae DNA C-values of 138 herbaceous species and their biological significance Relationship between DNA C-value and invasiveness in 539 angiosperm species in China Statistical and Comparative Analysis of Vegetable Genome Size Karyotypes and C-values of Two Plantago Species from the QinghaiTibet Plateau, China Estimation of Genome Size of Four Panax Species by Flow Cytometry*