Common name: Japanese gentian.
Botanical classification: Gentiana L. hybrid.
Variety denomination: ‘Ashiro 29-2075’.
BACKGROUND OF THE NEW VARIETY
The present invention relates to a new and distinct variety of Japanese gentian, Gentiana L., which has been given the variety denomination ‘Ashiro 29-2075’.
This new gentian is a double flower type and has a diameter at the top of the corolla of 30.6 mm. It is adapted for use as cut flowers or pot flowers.
ORIGIN OF THE VARIETY
The variety resulted from a multiple-step cross-breeding program starting from a group of unpatented varieties. The ancestor varieties were unpatented strains owned by the applicant, having the company-internal names: ‘17INP’ which belongs to the species Gentiana triflora, and ‘25-322-R1’, ‘26-904’, ‘12-320-1’, ‘14-526-2’, ‘11-24-1’, ‘11-192-1’, ‘13SH’, ‘10-76’, ‘6-62’, ‘12-186-1’, ‘12-212-1’, and ‘25-817’, which belong to the species Gentiana scabra. Group crosses and/or self-crosses with a single individual were performed. The program had seven steps, as shown in the map of FIG. 6 , which also indicates the company-internal names of the intermediary, unpatented strains. At each step, the individuals with good plant and flower shape were selected. The corresponding species identification is (((scabra x (scabra x triflora)) x scabra))) x ((scabra x (scabra x triflora)).
The multiple-step cross-breeding program was performed over multiple growing seasons up to 2018; in October 2018, selection of the variety was performed. We asexually reproduced the variety by vegetative reproduction through cuttings, tissue culturing via lateral bud culture, and in October 2020, the new variety was found to be stable and asexually reproduced true to type in successive generations.
The variety was developed and propagated in Iwate, Japan.
The variety can be propagated by cutting (optimal timing is mid-February) and/or tissue culturing via lateral bud culture.
Cultivation of the variety does not require particular conditions. Maintenance and storage method of the plant material can be by tissue culture via lateral bud culture.
The variety is adapted for use as cut flowers or pot flowers.
SUMMARY OF THE VARIETY
The variety is distinguished by double flower type and has a diameter at the top of the corolla of 30.6 mm, as compared to ‘Shine Blue Ashiro’ variety which is single flower type and has a diameter at the top of the corolla of 25.0 mm. ‘Shine Blue Ashiro’ is unpatented.
A comparison with ‘Shine Blue Ashiro’ variety is presented as follows in Table 1:
| TABLE 1 |
| |
| |
‘Shine Blue Ashiro’ |
‘Ashiro 29-2075’ |
| |
| Flower type |
Single |
double |
| Diameter at top of corolla |
25.0 mm |
30.6 mm |
| |
Additional distinguishing characteristics of the ‘Ashiro 29-2075’ plant are the six-seven (6.6 on average) lobes of the paracorolla, and the strong blue color (N95B on R.H.S. colour chart) of the secondary lobes with acute apex in-between the main lobes of the corolla
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which are as nearly true as is reasonable possible to make in a color illustration of this type:
FIG. 1 is a color photograph showing the ‘Ashiro 29-2075’ plant as grown in a culturing bed;
FIG. 2 is a color photograph showing flowers of the ‘Ashiro 29-2075’ plant;
FIG. 3 is a color photograph showing flowering stages of flowers of the ‘Ashiro 29-2075’ plant;
FIG. 4 is a color photograph showing petals of flowers of the ‘Ashiro 29-2075’ plant;
FIG. 5 is another color photograph showing flowers of the ‘Ashiro 29-2075’ plant;
FIG. 6 is a map showing the steps of the cross-breeding program from which the variety was obtained.
Due to chemical and/or digital development, processing and printing, the plants or portions of plants depicted in the photographs may or may not be precisely accurate, when compared to the actual botanical specimens.
DETAILED DESCRIPTION OF THE INVENTION
The plants in the botanical description below and shown in the Figures were grown in Iwate, Japan. The plants were collected in October 2020 at age 16 months.
Colors are given according to The 2015 R.H.S. Colour Chart.
BOTANICAL DESCRIPTION
| TABLE 2 |
| |
| Stem |
Length: |
81.9 |
cm |
| |
Stem shape in cross-section: |
circular |
| |
Thickness (main flowering |
3.4 |
mm |
| |
stem): |
|
|
| |
Number of flowering stems |
12.7 |
| |
per plant (average): |
|
| |
Texture: |
smooth |
| |
Color: |
strong yellow green (145A |
| |
|
on RHS Colour Chart) |
| |
Anthocyanin coloration at two |
present |
| |
thirds from base: |
|
| |
Number of internodes longer |
21.2 |
| |
than 5 mm (average): |
|
| |
Length of internode in central |
4.3 |
cm |
| |
third: |
|
|
| |
Side shoots: |
present |
| |
Number of side shoots with |
0.2 |
| |
only one node (average): |
|
| |
Number of side shoots with |
8.9 |
| |
more than one node |
|
| |
(average): |
|
| |
Position of longest leaf: |
in lower third |
| |
Leaf arrangement: |
opposite leaf arrangement |
| |
Leaf attachment: |
sessile |
| |
Leaf apex: |
acuminate |
| |
Leaf margin: |
entire |
| |
Leaf base: |
rounded |
| |
Leaf texture (inner side): |
smooth |
| |
Leaf texture (outer side): |
smooth |
| |
Leaf color (inner side): |
moderate olive green |
| |
|
(137A on RHS Colour |
| |
|
Chart) |
| |
Leaf color (outer side): |
moderate yellow green |
| |
|
(138C on RHS Colour |
| |
|
Chart) |
| |
Leaf venation pattern: |
parallel venation (three |
| |
|
lines) |
| |
Shape: |
broad lanceolate |
| |
Shape in cross section: |
folded upwards |
| |
Shape in longitudinal |
straight |
| |
section: |
|
| |
Twisting: |
present |
| |
Number of conspicuous |
3 |
| |
veins: |
|
| |
Anthocyanin coloration: |
absent |
| Inflorescence |
Distribution of flowers: |
clustered |
| |
Position of flowers: |
terminal and axillary |
| Plant: |
Number of terminal flowers |
5.1 |
| |
(average): |
|
| |
Typical plant height: |
about 81.9 cm (cut flower |
| |
|
or potted plant) |
| |
Typical growth habit: |
erect |
| |
Plant spread (average): |
69.6 |
cm |
| |
Sequence of flowering: |
from top downwards |
| |
Number of flowers per |
top: 5.1 |
| |
inflorescence: |
others: 2.0 |
| |
Sequence of flowering: |
from top downwards |
| |
Number of flowers at central |
2.0 |
| |
flowering node (average): |
|
| |
Number of flowering node: |
7.1 |
| Flower bud |
Shape of bud: |
oval |
| (about 4 |
|
|
| days before |
|
|
| flowering) |
|
|
| |
Length of bud (average): |
40.96 |
mm |
| |
Diameter of bud (average): |
13.36 |
mm |
| |
Color of bud: |
dark purple (83A on |
| |
|
RHS Colour Chart) |
| Flower |
Type: |
double |
| |
Time of flowering: |
late October |
| |
Flower longevity (potted |
17 |
days |
| |
plant): |
|
|
| |
Flower longevity (cut flower): |
8 |
days |
| Corolla |
Depth: |
42.8 |
mm |
| |
Diameter at middle third: |
17.8 |
mm |
| |
Curvature of lobes: |
reflexed |
| |
Color of inner side of lobes: |
moderate blue (N95C on |
| |
|
RHS Colour Chart) |
| |
Tube length (average): |
26.1 |
mm |
| |
Color of upper part of inner |
light purplish blue (N95D |
| |
side of tube: |
on RHS Colour Chart) |
| |
Color of upper part of outer |
dark purple (83A on RHS |
| |
side of tube: |
Colour Chart) |
| |
Streaked pattern on outer |
present |
| |
side of tube: |
|
| |
Color of streaked pattern on |
purplish-brown |
| |
outer side of tube: |
|
| |
Density of spots on the inner |
very sparse |
| |
side of the corolla lobes: |
|
| |
Density of spots on the upper |
sparse |
| |
part of the inner side of the |
|
| |
corolla tube: |
|
| |
Density of spots on the |
absent |
| |
outer side of the corolla tube: |
|
| |
Number of lobes: |
6.6 |
| |
Length of lobes: |
7.8 |
mm |
| |
Width of lobes: |
10.8 |
mm |
| |
Shape of lobes: |
broad triangular |
| |
Shape of distal end of lobes: |
acute |
| |
Presence of secondary lobes: |
present |
| |
Average number of secondary |
6.6 |
| |
lobes per flower: |
|
| |
Shape of secondary lobe |
acute |
| |
apex: |
|
| |
Color of secondary lobes |
strong blue (N95B on |
| |
|
RHS Colour Chart) for |
| |
|
both surfaces |
| Paracorolla |
Presence of paracorolla: |
present |
| |
Number of paracorolla lobes |
6.6 |
| |
(average): |
|
| |
Paracolla apex shape: |
acute |
| Calyx |
Anthocyanin coloration: |
present |
| |
Length of tube: |
12.7 |
mm |
| |
Diameter of tube: |
6.9 |
mm |
| |
Shape of tube: |
funnel-shaped |
| |
Shape of lobe: |
narrow lanceolate |
| Sepal |
Sepal number: |
6 |
| |
Sepal lobe shape: |
narrow lanceolate |
| |
Sepal apex: |
acute |
| |
Sepal color (inner side): |
dark yellowish green |
| |
|
(136B on the RHS Colour |
| |
|
Chart) |
| |
Sepal color (outer side): |
strong yellow green |
| |
|
(143C on the RHS Colour |
| |
|
Chart) |
| Reproductive |
Stamens and anther: |
stamens are mutated into |
| organs |
|
petals and there is no |
| |
|
anther |
| |
Time of flowering: |
late October |
| |
Pistil number: |
1 |
| |
Pistil length (average): |
32.3 |
mm |
| |
Anther shape: |
narrow oval |
| |
Anther color: |
light yellow green (145C |
| |
|
on RHS Colour Chart) |
| |
In the above chart, specific numbers correspond to average values.
- Other features of the plant are as follows:
-
- Disease resistance.—Normal resistance was observed for pests and diseases in Iwate, Japan, using pest control by chemical spraying for gentian.
- Cold hardiness.—Strong, the variety can withstand winter in Iwate, Japan, including low temperatures of about −10° C. with abundant snow.
- Heat tolerance.—Normal, the variety can withstand summer in Iwate, Japan, including high temperatures of about 35° C.
- Flower fragrance.—Absent.