BY Niu Yingze (牛应泽) Dept. of Plant Breeding and Seed Engineering CHAPTER 15 RELEASE OF VARIETIES AND SEED MULTIPLICATION 品种审定与良种繁育 Current Regulations of Agricultural Seed Production (1) The Current Seed Law of P. R. China (2) Registration and Release of Plant Cultivars (3) Plant Breeder’s Right (4) Requirements for the Seed Enterprises: Capital asset; Physical / technical conditions Registration and Release of Crop Varieties pulsory Tests to pass: (1) Regional tests 区域试验 (2) Productive tests (Farmer’s field tests) 生产试验 (3) Technical appraisal 技术鉴定(鉴定DUS “三性”) (4) Field quality control (test) 田间质量鉴定 DUS: D – Distinctness U – Uniformity S – Stability §1 Regional Test of New Varieties 新品种区域化鉴定 Regional trials (1) The System National regional test (divided into large regions) Provincial regional test (2) The task Identification of the main characteristics (Productivity, adaptation, yield stability, disease resistance, etc.) Determination of the adaptable regions Selection of suitable varieties for different regions Regional trial (3) The methodology of regional trials A. Selection of the locations: representative locations B. The Check (reference) variety C. Experimental design: plete block design D. Statistics (Yield increase %; Stability and Stability indices) 2. Production Trial Production trial, . Farmer land trial Large parison (totally over 1 mu/variety); 1-2 rep’s Cultivation trial (Experiment for cultivation techniques) Multiple factors considered: planting date planting desity fertilizer application (N, P, K and others) other technical factors Experimental designs Multi-factor designs (plete block design, split-block design, latin square design, ……) Replications = 3 or more 3. Cultivation Trial Regional Tests of New Varieties: Trials Regional trials (2-3 years) Production trial (farmer land production trial) Cultivational trial Purposes Productivity test Adaptability and Stability test Optimum growing location
