International union for the protection of new varieties of plants
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GUIDELINES FOR THE CONDUCT OF TESTS FOR DISTINCTNESS, UNIFORMITY AND STABILITY Alternative Names:*
The purpose of these guidelines (“Test Guidelines”) is to elaborate the principles contained in the General Introduction (document TG/1/3), and its associated TGP documents, into detailed practical guidance for the harmonized examination of distinctness, uniformity and stability (DUS) and, in particular, to identify appropriate characteristics for the examination of DUS and production of harmonized variety descriptions. ASSOCIATED DOCUMENTS These Test Guidelines should be read in conjunction with the General Introduction and its associated TGP documents. TABLE OF CONTENTS PAGE 1. Subject of these Test Guidelines 3 2. Material Required 3 3. Method of Examination 3 3.1 Number of Growing Cycles 3 3.2 Testing Place 3 3.3 Conditions for Conducting the Examination 3 3.4 Test Design 4 3.5 Additional Tests 4 4. Assessment of Distinctness, Uniformity and Stability 4 4.1 Distinctness 4 4.2 Uniformity 5 4.3 Stability 6 5. Grouping of Varieties and Organization of the Growing Trial 6 6. Introduction to the Table of Characteristics 6 6.1 Categories of Characteristics 6 6.2 States of Expression and Corresponding Notes 7 6.3 Types of Expression 7 6.4 Example Varieties 7 6.5 Legend 8 Table of Characteristics/Tableau des caractères/Merkmalstabelle/Tabla de caracteres 9 7. Explanations on the Table of Characteristics 17 8.1 Explanation covering several characteristics 17 8.2 Explanations for individual characteristics 17 8.3 Growth stages of Linum usitatissimum L. adapted to the BBCH (Meier U., 1997) scale applicable to individual plant 22 8. Literature 23 9. Technical Questionnaire 24 1.Subject of these Test GuidelinesThese Test Guidelines apply to all varieties of Linum usitatissinum L.. 2.Material Required2.1 The competent authorities decide on the quantity and quality of the plant material required for testing the variety and when and where it is to be delivered. Applicants submitting material from a State other than that in which the testing takes place must ensure that all customs formalities and phytosanitary requirements are complied with. 2.2 The material is to be supplied in the form of seed. 2.3 The minimum quantity of plant material, to be supplied by the applicant, should be 1 kg The seed should meet the minimum requirements for germination, species and analytical purity, health and moisture content, specified by the competent authority. In cases where the seed is to be stored, the germination capacity should be as high as possible and should, be stated by the applicant. 2.4 The plant material supplied should be visibly healthy, not lacking in vigor, nor affected by any important pest or disease. 2.5 The plant material should not have undergone any treatment which would affect the expression of the characteristics of the variety, unless the competent authorities allow or request such treatment. If it has been treated, full details of the treatment must be given. 3.Method of Examination3.1 Number of Growing CyclesThe minimum duration of tests should normally be two independent growing cycles. 3.2 Testing PlaceTests are normally conducted at one place. In the case of tests conducted at more than one place, guidance is provided in TGP/9 “Examining Distinctness”. 3.3 Conditions for Conducting the Examination3.3.1 The tests should be carried out under conditions ensuring satisfactory growth for the expression of the relevant characteristics of the variety and for the conduct of the examination. 3.3.2 The optimum stage of development for the assessment of each characteristic is indicated by a number in the second column of the Table of Characteristics. The stages of development denoted by each number are described in Chapter 8. | ||||||||||||||||||||||
