Functional Nutrition Quality Analysis of Japonica Rice Varieties in the Cold Region Construction Core Collections of Pear Germplasms in Cold Region by SSR and Phenotypic Traits Effects of Transplanting Density on Contribution and Accumulation of Soluble Sugar on Japonica Rice in Cold Region Interaction of Genotypes with Environments for Three Quality Traits of Rice in Cold Region by AMMI Model Changes in Starch Accumulation and Activity of Enzymes Associated with Starch Synthesis under different Nitrogen Applications in Japonica Rice in Cold Region Protecting enzyme system of herbage and its functions in the cold growing process in alpine and cold region Morphogenesis and Physiological Basis in Wheat Cultivars with Different Levels of Cold-Resistance during Cold Acclimation and Freezing Period Construction Core Collections of Pear Germplasms in Cold Region by SSR and Phenotypic Traits