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E

TG/LITCHI(proj. 2)

ORIGINAL: English

DATE: 2012-06-15

INTERNATIONAL UNION FOR THE PROTECTION OF NEW VARIETIES OF PLANTS

Geneva




DRAFT











LITCHI
UPOV Code: LITCHI_CHI
Litchi chinensis Sonn.

*





GUIDELINES
FOR THE CONDUCT OF TESTS
FOR DISTINCTNESS, UNIFORMITY AND STABILITY
prepared by experts from China
to be considered by the


Technical Working Party for Fruit Crops at its forty-third session,
to be held in Beijing, from July 30 to August 3, 2012

Alternative Names:*


Botanical name

English

French

German

Spanish

Litchi chinensis Sonn.

Litchi, Lychee

Litchi

Litschi

Lichi




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 3

3.5 Additional Tests 3

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 5

6.1 Categories of Characteristics 5

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 18

9. Literature 33

10. Technical Questionnaire 34



1.Subject of these Test Guidelines

These Test Guidelines apply to all varieties of Litchi chinensis Sonn..




2.Material Required

2.1 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 air-layerings or grafts. If the material is supplied in the form of grafts, the rootstocks of the grafts should also be supplied at the same time.
2.3 The minimum quantity of plant material, to be supplied by the applicant, should be:
5 plants
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 Examination




3.1 Number of Growing Cycles

3.1.1 The minimum duration of tests should normally be two independent growing cycles.


3.1.2 The growing cycle is considered to be the duration of a single growing season, beginning with bud burst, flowering and fruit harvest and concluding when the following dormant period ends with the swelling of new season buds.


3.1.3 In particular, it is essential that the plants produce a satisfactory crop of fruit in each of the two growing cycles.

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