|
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 |
|
III. Conduct of tests |
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I.
Subject
These test guidelines apply to all varieties of Pigeonpea (Cajanus cajan L.Millsp).
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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
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
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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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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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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|
S.No |
Characteristics |
States |
Note |
Example varieties |
Stage of observation |
Type
of assessment |
|
1. |
Plant: anthocyanin colouration
of hypocotyl |
absent |
1 |
|
seedling |
VS |
|
2. |
Plant: branching pattern |
erect(<300) |
3 |
|
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) |
1 |
|
|
VG |
|
4. |
Plant: growth habit |
indeterminate |
1 |
|
full
flowering |
VG |
|
5. |
Stem : colour |
green |
1 |
|
full
flowering |
VG |
|
6. |
Leaf: shape |
oblong |
1 |
|
full
flowering |
VG |
|
7. |
Leaf : pubescence on lower
surface of the leaf |
absent |
1 |
|
full
flowering |
VG |
|
8. |
Flower: colour of petal |
light yellow |
1 |
|
full
flowering |
VG |
|
9. |
Flower:
pattern of streaks on petal |
absent |
1 |
|
full
flowering |
VG |
|
10. |
Pod:
colour |
green |
1 |
|
premature pod(dough stage) |
VG |
|
11. |
Pod: pubescence |
absent |
1 |
|
full podding |
VG |
|
12. |
Pod: waxiness |
absent |
1 |
|
premature pods |
VG |
|
13. |
Pod :surface
stickiness |
absent |
1 |
|
premature pods |
VG |
|
14. |
Pod: constriction |
slight |
3 |
|
premature pods |
VG |
|
15. |
Plant :height |
short(<100 cm) |
3 |
|
harvest maturity |
MS |
|
16. |
Seed :colour |
cream |
1 |
|
ripe seeds |
VG |
|
17. |
Seed :colour
pattern |
uniform |
1 |
|
ripe dry seeds |
VG |
|
18. |
Seed: shape |
oval |
1 |
|
ripe seeds |
VG |
|
19. |
Seed: size(100 seed
weight ) |
small(<7g ) |
3 |
|
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
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||
| 1 oblong |
2 obovate |
3 seasme |
Characteristic
9. Flower : pattern of streaks on petal
![]() |
|||
| 1 absent |
2 sparse |
3 medium |
|
![]() |
|||
|
4 |
5
|
||
Characteristic
14. Pod : constriction
![]() |
|
| 3 slight |
7 prominent |
Characteristic
17. Seed : colour pattern
![]() |
|
|
1 |
2
|
Characteristic
18. Seed : shape
![]() |
||
|
1 |
2 |
3 |
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|
Reference
Number |
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|
Technical
questionnaire |
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| 1.
Species
(Cajanus
cajan L.)
Pigeonpea
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| 2.
Applicant (Name and address)
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| 3.
Proposed denomination or breeder’s reference
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| 4.
Information on origin, maintenance and reproduction of the variety
4.1
Genetic origin and breeding method
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| 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. |
Time of flowering (50% of the plants with at least one open flower) |
very
early (<61 days) |
1[
] |
||||
|
2. |
Plant: growth habit |
indeterminate |
1[
] |
||||
|
3. |
Stem : colour |
green |
1[
] |
||||
|
4. |
Pod: waxiness |
absent |
1[
] |
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| 6. Similar varieties and differences from these varieties | |||||||
|
Denomination of |
Characteristic in |
State of expression of similar variety |
State of expression of |
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@ In the case of identical states of expressions of both varieties, please indicate the size of the difference. |
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| 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
7.3 Other information
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8.3
Authorization
for release
(a)
Does the variety require prior authorization for release under legislation (b) Has such authorization been obtained? Yes { } No { }
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[End of the document]
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