Primary Study on Evolutional Correlation Analysis between the Plant C-Values and 1000-seed Weight of Different Genera in Pinaceae Study on Seeds Germination Traits of 28 Carex species STUDY ON THE SEED QUALITY OF ALNUS CREMASTOGYNE Genetic Analysis of Yield-Associated Traits by Unconditional and Conditional QTL in Brassica napus Comparison of 1000-seed Weight, Viability and Chemical Content in the Seed of Taxus chinensis var. mairei from Different Areas and Its Relationship with Ecological Factors