Studies on Evolution and Its Tendency of Agronomic Characters of Winter Wheat during Cultivar Alternation in xinjiang Fingerprint eff icacy breeding theory and its application of medicinal plant Method for Calculating Marginal Profits of Traits in Breeding Objectives for Sika Deer (Cervus nippon) Analysis of Genotypic and Environmental Effects on Wheat Varieties and Studies on the Breeding Objectives in the Southern Part of the Huanghuai Winter Wheat Region Facing toward Challenges and Corresponding Strategies for Maize Breeding in Southwestern Region of China Breeding Objectives for Reducing Pulp Production Costs of Masson Pine under Different Management Models