THE CLONING AND SEQUENCING OF THE rDNA INTERNAL TRANSCRIBED SPACER 1 REGIONS OF CHINESE FIR The spatial relationship analysis of rural per capital revenue based on GIS in Zulihe River basin, Gansu Province Genetic Relationship Analysis and Cultivar Identification of Blueberry Based on SSR Markers Factor of Prunella vulgaris yield components and morphological characteristics of relationship in different populations Relationship between Main Chemical Components in Leaf and Leaf Length in Different Positions in Tobacco (Nicotiana tabacum L.)