INDIA

ITG/19

Date:22-1-2004

National Guidelines

for the Conduct of Test for

Distinctness,Uniformity and Stablity

Pigeonpea

(Cajanus cajan L. Millsp)
  

            Contents

I.            Subject

II.           Material required

III.          Conduct of tests

IV.          Methods and observations

V.           Grouping of varieties

VI.          Characteristics and symbols

VII.         Table of characteristics

VIII.        Explanations on the table of characteristics

IX.          Technical questionnaire

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 I.   Subject

                         These test guidelines apply to all varieties of Pigeonpea (Cajanus cajan L.Millsp).  

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II.   Material required

1.      The Plant Variety Protection (PVP) Authority decides when, where and in what quantity and quality the plant material required for testing the variety is to be delivered.  Applicants submitting material from a country other than India must make sure that all customs formalities are complied with.  The minimum quantity of seed to be supplied by the applicant should be:

2000 grams (in one submission only)  

2.   The seed should meet the minimum requirements for germination capacity, moisture content and physical purity prescribed for certified seed in India . Especially for storage, which requires a higher standard, the applicant should state, the actual germination capacity which should be as high as possible. The seed supplied should be visibly healthy, not lacking in vigour or affected by any important pest or disease.

2.   The plant material must not have undergone any treatment unless the competent authorities allow or request such treatment.  If it has been treated, full details of the treatment must be given.

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III.   Conduct of tests

1.    The minimum duration of tests should normally be two independent similar growing seasons with reference to the ecosystem of the variety submitted for DUS test.

2.    The test should normally be conducted at two test locations. If any important characteristics of the variety can not be seen at these places, the variety may be tested at an additional place.

3.    The test should be carried out under conditions ensuring normal growth.  The size of the plot should be such that plants or parts of plant may be removed for measuring and counting without prejudice to the observation which must be made up to the end of the growing period. Each test should include a minimum of 300 plants which should be divided among 3 replications. Separate plots for observation and for measuring can only be used if they have been subjected to similar environmental conditions.

Test plot design

No. of rows :  6
Row length  :  5m
Row to row distance :  60cm(early varieties,80cm(late varieties)
Plant to plant distance :  20cm
Number of  replications  :  3

4.     Observations should not be recorded on plants in border rows.

5.     Additional tests for special purpose may be established.

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IV.   Methods and observations

1.     The characteristics described in the Table of characteristics should be used for the testing of varieties for DUS

2.    For the assessment of distinctness and stability, observations should be made on 30 plants or parts of 30 plants  which should be divided among 3 replications (10 plants per replication).

3.    For the assessment of uniformity of characteristics on the plot as a whole (visual assessment by a single observation of a group of plants or parts of plants), a population standard of 1% with an acceptance probability of at least 95% should be applied. In the case of a sample size of 300 plants, the number of off-types should not exceed 4.

4.    All observations on growth habit and leaf should be made at the time of full flowering unless indicated otherwise.

5.      All observations on the pod should be made at dough stage unless indicated otherwise.

6.      All observations on the seed should be made on harvested dry seeds.

7.    For the assessment of colour characteristics, it is recommended that Royal Horticultural Society (RHS) colour chart should be used.

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V.   Grouping of varieties

1.    The collection of varieties to be grown should be divided into groups to facilitate the assessment of distinctness. Characteristics, which are suitable for grouping purposes, are those, which are known from experience not to vary, or to vary only slightly, within a variety. Their various states of expression should be fairly evenly distributed throughout the collection.

2.      It is recommended that the competent authorities use the following characteristics for grouping varieties:

                                                                  i.    Time of flowering (characteristic  3)

                                                  ii.    Plant: growth habit (characteristic 4 )

                                                  iii.    Stem: colour (characteristic 5)

                                                  iv.    Pod: waxiness (characteristic 12)

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VI. Characteristics and symbols

1.    To assess distinctness, uniformity and stability, the characteristics and their states as given in the Table of characteristics should be used.

2.    Notes (1 to 9), for the purposes of electronic data processing, are given opposite the states of each characteristic.

3.      Legend

(*) Characteristics that should be used every growing period for the examinations of all varieties and should always be included in the description of the variety, except when the state of expression of a preceding characteristic or regional environmental conditions render this impossible.

      (+)  See explanations on the Table of characteristics in Chapter VII.

4.     The optimum stage of plant growth for assessment of each characteristic is indicated in the sixth column of Table of characteristics.

5. Type of assessment of characteristics indicated in column seven of Table of  characteristics is as follows :

MG : Measurement by a single observation of a group of plants or parts of plants

MS : Measurement of a number of individual plants or parts of plants

VG : Visual assessment by a single observation of a group of plants or parts of plants

VS : Visual assessment by observation of individual plants or parts of plants

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VII. Table of characteristics

S.No

Characteristics

States Note Example varieties Stage of observation

Type of assessment

1.
(*)

Plant: anthocyanin colouration of hypocotyl  

absent
present

1
9

 

seedling

VS

2.
(+)

Plant: branching pattern

erect(<300)
semi-spreading(300-600)
spreading(>600)

3
5
7

 

insertion of first flower

MS

3.  
(*)

Time of flowering (50% of the plants with at least one open flower)

very early (<61 days) early(61-90 days)  
medium(91-130 days)  
late( 131-160 days)  
very late(>160 days)

1
3
5
7
9

 

 

VG

4.  
(*)

Plant: growth habit

indeterminate
determinate

1
2

 

 full flowering

VG

5.  
(*)

Stem : colour

green  
purple

1
2

 

full   flowering

VG

6.  
(*)
(+)

Leaf: shape

oblong
obovate
seasme

1
2
3

 

full  flowering

VG

7.  
(*)

Leaf : pubescence on lower surface of the leaf 

absent
present

1
9

 

full  flowering

VG

8.  
(*)

Flower: colour of petal

light yellow  
yellow
orange yellow  
purple  
red

1
2
3
4
5

 

full  flowering

VG

9.  
(*)
(+)

Flower: pattern of streaks on petal

absent  
sparse
medium
dense
mosaic

1
3
5
7
9

 

full  flowering

VG

10.  
(*)

Pod: colour

green
green with brown streaks  
green with purple streaks  
purple  
dark purple

1
2
3
4
5

 

premature pod(dough stage)

VG

11.
(*)

Pod: pubescence

absent
present

1
2

 

full podding

VG

12.  
(*)

Pod: waxiness

absent
present

1
9

 

premature pods

VG

13.

Pod :surface stickiness

absent
present

1
2

 

premature pods

VG

14.
(*)  
(+)

Pod: constriction

slight
prominent  

3
7

 

premature pods

VG

15.
(*)

Plant :height

short(<100 cm)
medium(100-150cm)
tall(>150 cm)

3
5
7

 

harvest maturity

MS

16.
(*)

 

Seed :colour

cream
brown  
dark brown  
grey  
purple

1
2
3
4
5  

 

ripe seeds

VG

17.
(*)

Seed :colour pattern

uniform
mottled

1
2

 

ripe dry seeds

VG

18.
(*)

Seed: shape

oval
globular
elongate

1
2
3

 

ripe seeds

VG

19.

Seed: size(100 seed weight )

small(<7g )
medium(7-8g )  
large(9-11g )  
very large(>11g)

3
5
7
9

 

ripe dry seeds

MG

VIII. Explanations on the table of characteristics

3
erect
5
semi-spreading
7
spreading

Characteristic 4. Plant : growth habit

1
indeterminate  
    2
      determinate

Characteristic 6. Leaf : shape

1
oblong
2
obovate
3
seasme

Characteristic 9. Flower : pattern of streaks on petal

1
absent
2
sparse
3
medium

             4
              dense

5               
mosaic              

Characteristic 14. Pod : constriction

3
slight
7
prominent

Characteristic 17. Seed : colour pattern

                1
           uniform

2                      
mottled                   

Characteristic 18. Seed : shape

1        
oval         

2
globular

       3
         elongate

 

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IX. Technical questionnaire

      

Reference Number
(not to be filled in by the applicant

        

Technical questionnaire
to be completed in connection with an application for plant breeders’ rights

1. Species                                                      (Cajanus cajan L.)
                                                                             Pigeonpea

 

2. Applicant (Name and address)

 

  

3. Proposed denomination or breeder’s reference

 

 

      

4. Information on origin, maintenance and reproduction of the variety

      4.1 Genetic origin and breeding method

      4.2 Other information

 

    

5. Characteristics of the variety to be indicated (the number in brackets refers to the corresponding characteristic in Test Guidelines; please mark the state of expression which best corresponds).
S.No Characteristics State Example varieties Note

1.
(3)

Time of flowering (50% of the plants with at least one open flower)

very early (<61 days)
early(61-90 days)
medium(91-130 days)
late( 131-160 days)
very late(>160 days
)

 

1[  ]
3[  ]
5[  ]
7[  ]
9[  ]

2.
(4)

Plant: growth habit

indeterminate
determinat

 

1[  ]
2[  ]

3.
( 5 )

Stem : colour

green
purple

 

1[  ]
2[  ]

 4.
( 12 )

Pod: waxiness

absent
present

 

1[  ]
9[  ]

6. Similar varieties and differences from these varieties   

Denomination of
similar variety

Characteristic in
which the similar
variety is different @

State of expression of similar variety

State of expression of
candidate variety

  

  

     

  

    

   

    

  

@ In the case of identical states of expressions of both varieties, please indicate the size of the difference.

7.   Additional information which may help to distinguish the variety

  

7.1  Resistance to insects-pests and diseases

  

7.2     Special conditions for the examinatio n of the variety

 

7.3 Other information

 

  

8.3   Authorization for release

(a) Does the variety require prior authorization for release under legislation
      concerning the protection of the environment, human and animal health?

               Yes              {     }                                                  No         {      }  

(b)    Has such authorization been obtained?  

                 Yes      {     }                                                         No        {      }           

       

[End of the document]

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