|
INDIA |
|
ITG/11 |
|
Date : 15-1-2004 |
| National Guidelines |
| for the Conduct of Tests for |
| Distinctness, Uniformity and Stability |
| Sunflower |
| (Helianthus
annuus L.) |
|
|
|
I. |
|
III. |
| ________________________________________________________________________________ |
I.
Subject
These
test guidelines apply to all varieties, hybrids and parental lines of
sunflower (Helianthus annuus .L.)
| ________________________________________________________________________________ |
|
Variety and hybrid
- 5000 grams | ||
| In only one submission | ||
| Parental Line - 2000 grams |
The
seed should meet the minimum requirements for germination capacity, moisture
content and purity as prescribed for certified seed in
The plant material must not
have undergone any treatment unless the PVP Authority allows or requests such
treatment. If, it has been treated
full details of the treatment must be given.
| ________________________________________________________________________________ |
III. Conduct of tests
The minimum duration of tests
should normally be two independent growing seasons with reference to the
ecosystem of the variety submitted for DUS test.
The tests 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
The field tests should be
carried out under conditions ensuring normal growth.
The size of the plots should be such that plants or parts of plants may
be removed for measurement and counting without prejudice to the observations
which must be made up to the end of the growing period. Each test should include
at least a total of 300 plants. Separate plots for observation and for
measurement can only be used if they have been subject to similar environmental
conditions.
| Number of rows | : 8 |
| Row length | :6 m |
| Row to row distance | 60 cm |
| Plant to plant distance | 30 cm |
| Number of replications | : 2 |
Observations should not be
recorded on plants in border rows
Additional tests for special
purpose may be established
| ________________________________________________________________________________ |
The characteristics described
in the Table of characteristics should be used for the testing of varieties and
hybrids for DUS
All observations for the
assessment of distinctness and stability should be made on at least 20 plants or
parts of plants for inbreds/single cross hybrids and 50 plants for variety and
multiple hybrids in 2 replications.
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), the number of
aberrant plants or parts of plants should not exceed 3% in case of
hybrids/parental lines and 5% in the varieties.
For the assessment of colour
characteristics, it is recommended that Royal Horticultural Society (RHS) colour
chart should be used.
Unless otherwise indicated, all
observations on the leaf should be made on fully developed leaves after bud
stage but before flowering. The bud stage is reached when the diameter of the
main bud is about 1 cm for branched types or 3 to 7 cm for not branched types.
All observations on the seed
should be made at maturity of plants and not on seed sent in by the applicant.
When resistance characteristics
are used for assessing distinctness, homogeneity and stability, records must be
taken from tests made under conditions of controlled infection.
A difference in the formula of
a sunflower hybrid is not enough by itself and the protection of a hybrid
variety of sunflower requires that it be sufficiently different in its
characteristics when compared with other varieties. If an application is filed
for protection of a hybrid variety of sunflower which is based on a formula
already existing, the applicant should be informed of the fact and given the
possibility of withdrawing his application. If he does not withdraw his
application, the authority should test the variety.
| ________________________________________________________________________________ |
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 do not vary, or to vary only
slightly, within a variety. Their
various states of expression should be fairly evenly distributed throughout the
collection.
It is recommended that the
testing organisation/ centre use the
following characteristics for
grouping varieties :
i.
Time of flowering (Characteristics 3)
ii.
Leaf : fineness of serration (Characteristic 8)
iii.
Plant : natural height (Characteristic 30)
iv.
Plant : branching (Characteristics 31)
v.
Seed : stripes (Characteristics 38)
| ________________________________________________________________________________ |
VI.
Characteristics and
symbols
To assess distinctness,
uniformity and stability, the characteristics and their states as given in the
Table of characteristics should be used.
In multiple hybrids
characteristics sunflower segregate with the effect that several states of
characters occur side by side in a variety.
Notes (1 to 9) should be given
for each state of different characteristics for the purpose of electronic data
processing.
Legend :
|
(*)
|
Characteristics should be
used on all varieties in every growing season over which examinations are
made and always be included in the variety descriptions, except when the
state of expression of a preceding characteristic render this impossible. |
|
(+) |
Characteristic is
illustrated by explanation or drawing in chapter VIII (Explanations on the
table of characteristics) |
The optimum stage of plant growth for assessment of
each characteristic is indicated by a number in the sixth column
Type of assessment of characteristics indicated in column 7 of Table of characteristics is as follows
|
|
|
Type
of assessment |
|
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 plant or parts of plants |
| ________________________________________________________________________________ |
|
Sl.No. |
Characteristics |
States |
Note |
Example
Varieties |
Stage of observa-tion |
Type of
assess-ment |
|
1. |
Hypocotyl
: anthocyanin coloration |
absent
|
1 |
|
Seedling
emergence |
VG |
|
2. |
Leaf : anthocyanin coloration on margin of young
leaves |
absent |
1 |
|
Before
flowering |
VG |
|
3. (*) (+) |
Plant : time of flowering |
early(<55
days) |
3 |
Morden |
|
|
|
4. (*) |
Leaf : size |
very
small |
1 |
|
Flowering |
VG |
|
5. (+) |
Leaf : shape |
oblong |
1 |
|
Flowering |
VG |
|
6. (*) |
Leaf : colour |
light
green |
3 |
234A, LSH3 |
flowering
|
VG |
|
7. (*) |
Leaf : blistering |
absent |
1 |
234A |
Flowering |
VG |
|
8. (*) (+) |
Leaf : fineness of serration |
fine |
3 |
6D-1 |
Flowering |
VG |
|
9. (+) |
Leaf : angle of lateral veins |
acute |
1 |
|
Flowering |
VG |
|
10. (+) |
Leaf : height of the tip of the blade compared to
insertion of petiole (at 2/3 height of plants) |
very
low |
1 |
|
flowering
|
VS |
|
11. (+) |
Leaf : angle between lower part of petiole and
stem |
small |
1 |
|
Flowering |
VS |
|
12. |
Leaf : hairiness |
absent |
1 |
|
Flowering |
VG |
|
13. |
Leaf
: petiole pigmentation |
absent |
1 |
|
flowering
|
VG |
|
14. (+) |
Stem : hairiness at the top |
absent |
1 |
|
flowering
|
VG |
|
15. |
Stem : pigmentation |
absent |
1 |
|
flowering
|
VG |
|
16. |
Stem : number of leaves on main stem |
low<21 |
3 |
HA 303 |
flowering
|
MS |
|
17. |
Ray flowers : number |
very
few (<16) |
1 |
|
flowering
|
MS |
|
18. |
Ray flower : shape
|
elongated |
1 |
RHA 266 |
flowering
|
VG |
|
19. (*) |
Ray flower : colour |
ivory |
1 |
|
flowering
|
VG |
|
20. |
Disk flower : colour |
yellow |
1 |
|
flowering
|
VG |
|
21. (+) |
Disk flower : anthocyanin colouration of stigma |
absent
|
1 |
|
flowering
|
VG |
|
22. |
Disk flower : pollen
colour |
white |
1 |
|
flowering
|
VG |
|
23. |
Head : number of bracts on the back |
few |
1 |
|
Seed
setting |
MS |
|
24. |
Bract : shape |
elongated |
1 |
|
Seed
setting |
VG |
|
25. |
Bract : anthocyanin colouration |
absent |
1 |
|
Seed
setting |
VG |
|
26. (+) |
Plant : natural position of closest lateral head
to the central head (end of flowering) - Branched |
above
|
1 |
|
Seed
setting |
VG |
|
27. (+) |
Head : attitude |
horizontal |
1 |
|
harvest
maturity |
VG |
|
28. (*) |
Head : diameter |
small
(<15 cm) |
3 |
RHA 274 |
harvest
maturity |
MS |
|
29. (*) (+) |
Head : shape of grain side |
concave |
1 |
|
Harvest
maturity |
VG |
|
30. (*) |
Plant : height |
very
short (<80 cm) |
1 |
|
Harvest
maturity |
MS |
|
31. (*) |
Plant : branching
|
absent |
1 |
Morden, KBSH 1 |
Harvest
maturity |
VG |
|
32. (+) |
Plant : type of branching |
basal
branching |
1 |
|
Harvest
maturity |
VG |
|
33. (*) |
Seed : length |
Short
(<1 cm) |
3 |
|
After
harvest |
MS |
|
34. (+) |
Seed : shape |
elongate |
1 |
RHA 274 |
After
harvest |
VG |
|
35. |
Seed : weight (100 seeds) |
low
(<4 g) |
3 |
RHA 274 |
After
harvest |
MS |
|
36. (*) |
Seed : base colour |
white |
1 |
|
After
harvest |
VG |
|
37. |
Seed : mottling |
absent |
1 |
|
After
harvest |
VG |
|
38. (*) (+) |
Seed : stripes |
absent |
1 |
RHA 274 |
After
harvest |
VG |
|
39. |
Seed : colour of stripes |
white |
1 |
Surya |
After
harvest |
VG |
|
40. |
|
low
(<25%) |
3 |
6D 1,
TCSH 1 |
After
harvest |
MS |
| ________________________________________________________________________________ |
VIII.
Explanations on the table of characteristics
Characteristic
3. Time of flowering
Characteristic 5. Leaf : shap
![]()
|
||||||
|
1 oblong |
2 lanceolate |
3 triangular |
4 cordate |
5 rounded |
6 ovate |
|
Characteristic 8. Leaf : fineness of serration
![]() |
||||
| 3 fine |
5 medium |
7 coarse |
||
Characteristic 9. Leaf : angle of lateral veins
![]() |
|||
| 1 acute |
2 right angle or nearly right angle |
3 obtuse |
|
Characteristic
10. Leaf : height of the tip of the blade compared to insertion of petiole (at
2/3 height of plants)
|
|
|||||
| 1 very low |
2 low |
3 medium |
4 high |
5 very high |
|
Characteristic 11. Leaf : angle between lower part of petiole and stem
|
|
Characteristic 14. Stem : hairiness at the top (hairiness should be recorded 5 cm below the head, just before flowering
![]() |
|||||
| 1 absent |
2 medium |
3 strong |
|||
Characteristic 21. Disk flower: anthocyanin colouration of stigma
![]() |
Characteristic 26. Plant : natural position of the closest lateral head to the central head (at end of flowering) - Branched
![]() |
||||
| 1 above |
2 below |
|||
Characteristic
27. Head : attitude
![]() |
||||
| 1 horizontal |
2 inclined |
3 vertical |
4 half turned down |
5 turned down |
Characteristic
29. Head : shape of grain side
![]() |
|||||
| 1 concave |
2 flat |
3 convex |
4 mis-shapen |
||
Characteristic
32. Plant : type of branching (at maturity)
![]() |
|||||
| 1 basal branching |
2 top branching |
3 fully branched with central head |
|
4 fully branched without central head |
|
Characteristic 34. Seed : shape
![]() |
|||||
| 1 elongate |
2 ovoid elongate |
3 ovoid wide |
4 rounded |
||
Characteristic
38. Seed : stripes
![]() |
|||
| 1 absent |
2 present |
||
| ________________________________________________________________________________ |
|
Reference Number |
|||||||||||||||||||||||||||
|
Technical questionnaire
|
|||||||||||||||||||||||||||
| 1.
Species: Helianthus
annuus
L. Sunflower
|
|||||||||||||||||||||||||||
| 2.
Applicant (Name and address)
:
|
|||||||||||||||||||||||||||
| 3. Proposed
denomination or breeder's reference
|
|||||||||||||||||||||||||||
|
4.
Information on origin, maintenance and reproduction of the variety
4.1
Type
of material
4.2
Formula
(hybrid only)
4.3
Genetic
origin and breeding method (source, crossing, mutation etc.)
4.4
Maintenance
4.5
Use
4.5
|
|||||||||||||||||||||||||||
|
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 | States | Example varieties | Notes | |||||||||||||||||||||||
|
5.1 |
Time
of flowering (quote mean date of flowering of variety as well as of two
well-known comparable varieties) |
Early |
Morden |
3
[ ] |
|||||||||||||||||||||||
|
5.2 |
Leaf : fineness of serration |
Fine |
6D
1 |
3
[ ] |
|||||||||||||||||||||||
|
5.3 (30) |
Plant
: height (quote height of variety as well as of two well-known comparable
varieties) |
Very
short (<81 cm) |
|
1
[ ] |
|||||||||||||||||||||||
|
5.4. (3.1) |
Plant: branching |
Absent |
Morden,
KBSH 1 |
1
[ ] |
|||||||||||||||||||||||
|
5.5 (38) |
Seed:
stripes |
Absent |
RHA
274 MSFH 17 |
1
[ ] |
|||||||||||||||||||||||
| 6.
Similar varieties and differences from these varieties |
|||||||||||||||||||||||||||
|
Denomination of |
Characteristic in |
State of expression of similar Variety |
State of expression of candidate variety | ||||||||||||||||||||||||
| 0)
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
i.
Downy
mildew
ii.
Rust
iii.
Alternaria
blight
7.2 Special conditions for the examination of the variety
|
|||||||||||||||||||||||||||
|
8.
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 { }
|
|||||||||||||||||||||||||||
| ________________________________________________________________________________ |