LY/T 1847: Evolution and historical versions
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Guidelines for the conduct of tests for distinctness, uniformity andstability of Lagerstroemia L.
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LY/T 1847-2025
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| LY/T 1847-2009 | English | 599 |
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Guidelines for the conduct of tests for distinctness, uniformity and stability. Crapemytle(Lagerstroemia indica L.)
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LY/T 1847-2009
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Basic data | Standard ID | LY/T 1847-2025 (LY/T1847-2025) | | Description (Translated English) | Guidelines for the conduct of tests for distinctness, uniformity andstability of Lagerstroemia L. | | Sector / Industry | Forestry Industry Standard (Recommended) | | Classification of Chinese Standard | B05 | | Classification of International Standard | 65.020.20 | | Date of Issue | 2025-07-21 | | Date of Implementation | 2025-11-01 | | Older Standard (superseded by this standard) | LY/T 1847-2009 | | Issuing agency(ies) | National Forestry and Grassland Administration | LY/T 1847-2009: Guidelines for the conduct of tests for distinctness, uniformity and stability. Crapemytle(Lagerstroemia indica L.)
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Guidelines for the conduct of tests for distinctness, uniformity and stability.Crapemytle(Lagerstroemia indica L.)
ICS 65.020
B61
People's Republic of China Forestry Industry Standard
New plant variety specificity, consistency, stability
Test Guide Ziwei
Released on June 17,.2009
2009-10-01 implementation
State Forestry Administration released
Content
Foreword III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 DUS test technical requirements 1
4.1 Test material 1
4.2 Test Method 1
5 Specificity, consistency and stability evaluation 2
5.1 specificity 2
5.2 Consistency 3
5.3 Stability 3
6 variety group 3
6.1 Variety group description 3
6.2 Grouping Features 3
7 trait characteristics and related symbol description 3
7.1 Feature Type 3
7.2 Expression status and code 3
7.3 Expression Type 3
7.4 Standard Variety 3
7.5 Symbol Description 3
Appendix A (Normative Appendix) Variety traits characteristics 5
Appendix B (informative) Technical Questionnaire 11
Reference 13
Foreword
This standard is based on GB/T 19557.1-2004 "General guidelines for the specificity, consistency and stability of new plant varieties".
Appendix A of this standard is a normative appendix, and Appendix B is an informative appendix.
This standard is proposed and managed by the Office of Plant Variety Protection of the State Forestry Administration.
This standard is drafted by. Beijing Forestry University, State Forestry Administration Plant New Variety Protection Office.
The main drafters of this standard. Zhang Qixiang, Zhou Jianren, Huang Faji, Gao Yizhen, Pan Huitang, Tian Miao.
New plant variety specificity, consistency, stability
Test Guide Ziwei
1 Scope
Test technical requirements.
This standard applies to the testing of all new varieties of Lagerstroemia.
2 Normative references
The terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all
Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study
Is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard.
GB/T 19557.1-2004 General guidelines for the testing of plant species specificity, consistency and stability
3 Terms and definitions
The terms and definitions established in GB/T 19557.1-2004 apply to this standard.
4 DUS test technical requirements
4.1 Test materials
4.1.1 The time and place of the test variety delivered by the approval authority and the quantity and quality of the plant material required for testing. Non-tested
For materials submitted by the state or region, the applicant shall provide relevant documents such as customs and phytosanitary in accordance with the relevant provisions on entry and exit and transportation.
4.1.2 The test material submitted should be a 2-year-old plant that is propagated by cuttings.
4.1.3 The number of test materials provided shall not be less than 10 strains.
4.1.4 The new variety of materials to be tested shall be plants that are free of pests and diseases and grow normally.
4.1.5 Except where the approval authority permits or requires the treatment of the material, the submitted plant material shall not be subject to any amount of trait expression.
External processing. If it has been processed, detailed information about the processing should be provided.
4.2 Test methods
4.2.1 Test cycle and time
Test at least one growth cycle if the test conditions are met.
4.2.2 Test location
The test site for the new variety to be tested shall be carried out in the test base and laboratory designated by the approval authority.
4.2.3 Test conditions
The test shall be carried out under the condition that the relevant characteristics of the new variety to be tested can be fully expressed, and the selected test materials shall be at least at the test site.
The site is fixed for more than one year.
4.2.4 Test Design
4.2.4.1 New varieties to be tested 10 plants should be planted in the test area, planted in the same location and environmental conditions as standard and similar varieties.
4.2.4.2 If the test requires extraction of certain parts of the plant as a sample, the sample collection shall not affect the entire growth cycle of the test plant.
Observation.
4.2.4.3 Unless otherwise stated, all observations shall be made on materials on the same part of 6 plants or 6 plants.
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