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:*
ASSOCIATED DOCUMENTS These guidelines should be read in conjunction with document TG/1/3, “General Introduction to the Examination of Distinctness, Uniformity and Stability and the Development of Harmonized Descriptions of New Varieties of Plants” (hereinafter referred to as the “General Introduction”) and its associated “TGP” documents. TABLE OF CONTENTS PAGE 1. Subject of these Guidelines 3 2. Material Required 3 3. Method of Examination 3 3.1 Duration of Tests 3 3.2 Testing Place 3 3.3 Conditions for Conducting the Examination 3 3.4 Test Design 4 3.5 Number of Plants / Parts of Plants to be Examined 4 3.6 Additional Tests 4 4. Assessment of Distinctness, Uniformity and Stability 4 4.1 Distinctness 4 4.2 Uniformity 5 4.3 Stability 5 5. Grouping of Varieties and Organization of the Growing Trial 5 6. Introduction to the Table of Characteristics 6 6.1 Categories of Characteristics 6 6.2 States of Expression and Corresponding Notes 6 6.3 Types of Expression 6 6.4 Example Varieties 6 6.5 Legend 6 7. Table of Characteristics/Tableau des caractères/Merkmalstabelle/Tabla de caracteres 7 8. Explanations on the Table of Characteristics 18 8.1 Explanations covering several characteristics 18 8.2 Explanations for individual characteristics 19 9. Literature 22 10. Technical Questionnaire 23 1.Subject of these GuidelinesThese Test Guidelines apply to all varieties of ornamental apple, Malus Mill., of the family Rosaceae. 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 three-year-old trees grafted on a rootstock. 2.3 The minimum quantity of plant material, to be supplied by the applicant, should be: 5 trees. 2.4 The plant material supplied should be visibly healthy, not lacking in vigor, nor affected by any important pest or disease. The rootstock should be named when the plant material is supplied. The competent authorities may prescribe the rootstock on which the variety should be grafted. 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 Duration of TestsThe minimum duration of tests should normally be two independent growing cycles. For the purposes of these Test Guidelines, a growing cycle refers to the fruiting cycle. 3.2 Testing PlaceThe tests should normally be conducted at one place. If any characteristics of the variety, which are relevant for the examination of DUS, cannot be seen at that place, the variety may be tested at an additional place. 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. In particular, a satisfactory crop of fruit must be produced in at least two fruiting cycles. 3.3.2 Because daylight varies, color determinations made against a color chart should be made either in a suitable cabinet providing artificial daylight or in the middle of the day in a room without direct sunlight. The spectral distribution of the illuminant for artificial daylight should conform with the CIE Standard of Preferred Daylight D 6500 and should fall within the tolerances set out in the British Standard 950, Part I. These determinations should be made with the plant part placed against a white background. | ||||||||||||||||||||||
