GB/T 19557.24-2018Guidelines for the conduct of tests for distinctness, uniformity and stability—Maize (Zea mays L.) (English PDF)
植物品种特异性、一致性和稳定性测试指南 玉米
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 14, 2018
Implementation date
December 1, 2018
Scope
GB/T 19557.24-2018 is the English-translated version of 植物品种特异性、一致性和稳定性测试指南 玉米.
GB/T 19557.24-2018 is the Chinese guideline for testing maize (Zea mays L.) varieties for distinctness, uniformity and stability (DUS). It is part 24 of the GB/T 19557 series and builds on the general guidelines of GB/T 19557.1, GB 4404.1 and NY/T 1248.
It covers the conditions the propagating material must meet, the test method, the determination of distinctness, uniformity and stability, the grouping traits and the technical questionnaire, while the maize trait table, its explanations and the questionnaire format are given in normative Annexes A to C. It defines group and individual measurement and group visual observation, and the symbols MG, MS, PQ, QL, QN and VG.
It applies to DUS testing and result determination for maize varieties. It was issued on 14 May 2018 and has applied since 1 December 2018.
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Document preview — GB/T 19557.24-2018
National Standard of the People's Republic of China
- ICS
- 65.020.20
- Classification
- B 05
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 symbol
- 5 Conditions to be met for reproductive material
- 6 Test Method
- 7 Determination of specificity, consistency and stability results
- 8 traits table
- 9 grouping traits
- 10 Technical Questionnaire
- Appendix A (Normative Appendix) Maize traits Table
- Appendix B (normative appendix) Explanation of the corn trait table
- Appendix C (Normative Appendix) Corn Technical Questionnaire Format
Foreword
GB/T 19557 "Guidelines for Testing Plant Variety Specificity, Consistency and Stability" is divided into the following sections.
---GB/T 19557.1 General Guidelines for the Testing of Plant Variety Specificity, Consistency and Stability;
---GB/T 19557.2 Plant Variety Specificity, Consistency and Stability Test Guide for Common Wheat;
---GB/T 19557.3 Test Guide for Specific Variety, Consistency and Stability of New Varieties of Plants;
---GB/T 19557.4 Plant Variety Specificity, Consistency and Stability Test Guide Soy;
---GB/T 19557.5 Plant Variety Specificity, Consistency and Stability Test Guide Chinese Cabbage;
---GB/T 19557.6 Test Guide for Plant Variety Specificity, Consistency and Stability ramie;
---GB/T 19557.7 Test Guide for Plant Variety Specificity, Consistency and Stability;
---GB/T 19557.8 New plant variety specificity, consistency and stability test guide Li;
---GB/T 19557.9 Plant Variety Specificity, Consistency and Stability Test Guide Mustard;
---GB/T 19557.10 Plant Variety Specificity, Consistency and Stability Test Guide Lily;
---GB/T 19557.11 Plant Variety Specificity, Consistency and Stability Test Guide Kiwifruit;
---GB/T 19557.12 Plant Variety Specificity, Consistency and Stability Test Guide Garlic;
---GB/T 19557.13 Test Guide for Plant Variety Specificity, Consistency and Stability;
---GB/T 19557.14 Test Guide for Plant Variety Specificity, Consistency and Stability Brassica napus L.;
---GB/T 19557.15 Guidelines for the testing of plant species specificity, consistency and stability;
---GB/T 19557.16 Test Guide for Plant Variety Specificity, Consistency and Stability;
---GB/T 19557.17 Plant Variety Specificity, Consistency and Stability Test Guide Pepper;
---GB/T 19557.18 Test Guide for Plant Variety Specificity, Consistency and Stability;
---GB/T 19557.19 Plant Variety Specificity, Consistency and Stability Test Guide Chrysanthemum;
---GB/T 19557.20 Test Guide for Plant Variety Specificity, Consistency and Stability Eggplant;
---GB/T 19557.21 Plant Variety Specificity, Consistency and Stability Test Guide Melon;
---GB/T 19557.22 Plant Variety Specificity, Consistency and Stability Test Guide peas;
---GB/T 19557.23 Plant Variety Specificity, Consistency and Stability Test Guide Carnation;
---GB/T 19557.24 Test Guide for Plant Variety Specificity, Consistency and Stability;
---GB/T 19557.25 Plant Variety Specificity, Consistency and Stability Test Guide Cucumber;
---GB/T 19557.26 Plant Variety Specificity, Consistency and Stability Test Guide Apple;
---GB/T 19557.27 Plant Variety Specificity, Consistency and Stability Test Guide Watermelon;
---GB/T 19557.28 Test Guide for Plant Variety Specificity, Consistency and Stability;
---GB/T 19557.29 Plant Variety Specificity, Consistency and Stability Test Guide Cabbage;
---GB/T 19557.30 Plant Variety Specificity, Consistency and Stability Test Guide Pear;
---GB/T 19557.31 Plant Variety Specificity, Consistency and Stability Test Guide Barley;
---GB/T 19557.32 Plant Variety Specificity, Consistency and Stability Test Guide Sweet Potato;
---GB/T 19557.33 Plant Variety Specificity, Consistency and Stability Test Guide Cauliflower.
This part is the 24th part of GB/T 19557.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
1 Scope
This part of GB/T 19557 gives the technical points of the maize (Zeamays L.) variety specificity, consistency and stability test and The general principle of the outcome decision.
This section applies to corn variety specificity, consistency and stability testing and results determination.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB 4404.1 Grain crop seeds - Part 1. Cereals
GB/T 19557.1 General guidelines for testing specificity, consistency and stability of plants
NY/T 1248 Maize Anti-Sickness Identification Technical Specification
3 Terms and definitions
The following terms and definitions as defined in GB/T 19557.1 apply to this document.
3.1 Group measurement
An organ or part of a batch of plants or plants is measured to obtain a group record.
3.2 Individual measurement
An individual organ or part of a plant or plant is measured one by one, and a set of individual records is obtained.
3.3 Group visual observation
Visual inspection of an organ or part of a plant or plant to obtain a population record.
4 Symbol
The following symbols apply to this document.
MG. Group measurement.
MS. Individual measurement.
PQ. False quality.
QL. Quality traits.
QN. Quantitative traits.
VG. Group visual inspection.
*. The labeling trait is the importance of the International Union for the Protection of New Varieties of Plants (UPOV) for the harmonization of species descriptions, unless […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 30 pages — is available in the English PDF.
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Related Standards
GB 4404.1-2024 — Seed of food crops - Part 1: Cereals
GB/T 19557.1-2004 — General directives for the conduct of tests of distinctness,uniformity and stability for new varietiesof plants
GB/T 19557.1-2026 — Guidelines for the tests of distinctness, uniformity and stability for plant varieties - General
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