Strawberry plant Dorit
A new and distinct variety of strawberry (Fragaria L.) called "Dorit" is disclosed. The variety is a cross between "Dover A" and "Nurit", which results in a variety that flowers several months earlier than other known strawberry varieties.
The present invention relates to a new and distinct variety of strawberry (Fragaria L.) called "Dorit". The variety was developed from an organized scientifically designated breeding program carried out at the Agricultural Research Organization, the Volcani Center, Bet Dagan, Israel. The variety is the product of selection of seedlings resulting from crosses between the strawberry varieties "Dover A" and "Nurit". The variety was asexually vegetatively propagated through runners and the reproduction ran true.
SUMMARY OF THE INVENTIONThe new variety "Dorit" is able to grow in September and produce fruit starting in November and lasting until summer. The production of fruit beginning in November is two months earlier than any known variety of Fragaria L. The fruit of the "Dorit" variety is characterized by good taste, good shape and size as well as a long shelf life.
BRIEF DESCRIPTION OF THE FIGURESFIG. 1. Photograph of the "Dorit" variety illustrating the foliage and fruit.
FIG. 2. Photograph of the "Dorit" variety illustrating the fruit.
FIG. 3. Photograph of the "Dorit" variety illustrating the entire plant with both flowers and fruit.
DETAILED BOTANICAL DESCRIPTION OF THE INVENTIONThe "Dorit" variety was grown in winter under polyethylene tunnels in Israel. "Dorit" is a short day variety that flowers earlier than other known and available short day length strawberry varieties. Flowering and fruit production is not affected by the use of polyethylene wind tunnels. This production procedure is utilized in normal agricultural practices by the skilled artisan and does not involve temperature or light control. Mother plants were stored at 0.degree. C. from January through April. They were then planted in the nursery without further treatment. Runners with plantlets were produced during summer. These young plantlets were collected from the nursery in September and transferred to raised beds. Average temperatures at that time of the year are 30.degree. C. during the day and 22.degree. C. at night. Water and fertilizers were applied through drip irrigation. An example of an optimum planting date is between September 20th to the 25th with the approximate date of flowering on October 27, and the approximate date of first fruiting on November 27. "Dorit" flowering is not induced by chilling, but by natural exposure to short day length (long nights) characteristic of late fall and early winter. Color readings described herein were taken under natural light conditions and color identifications were made by reference to The Royal Horticultural Society Colour Chart (R.H.S.C.C.) except where common terms of color definition are employed.
The pertinent characteristics of the present invention are presented in Table 1 and Table 2. Additionally, the variety "Dorit" (1) has no tendency toward fruit malformation; (2) disease resistance appears normal in that no particular problematic conditions arose during trials; and (3) the type of bearing is not remontant (e.g., "Dorit" blooms perpetuously, during late fall and winter).
Fruit shape of "Dorit" is similar to the strawberry variety "Pajaro". The fruit is longer than broad, with primary, secondary and tertiary fruit possessing distinct shape (Table 2). The fruit is of medium firmness with an orange red color (Table 2).
The variety "Dorit" flowers several months earlier than known strawberry varieties. One of the closest known varieties would be "Karina" (Table 1) as well as the new varieties under co-pending U.S. patent application Ser. Nos. 07/735,969 ("Sharon"), 07/735,965 ("Shalom"), 07/735,967 ("Smadar"), and 07/735,970 ("Saaid"). Additionally early flowering results in early fruit production for "Dorit" and the four co-pending varieties (Table 3). Total Soluble Solids (TSS), percent acidity and aroma are presented in Table 4 by comparison to the varieties listed in Table 3.
TABLE 1
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PLANT CHARACTERISTICS OF "DORIT"
MORPHOLOGICAL COMPARABLE
TRAIT DESCRIPTION.sup.a
VARIETY.sup.b
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Classification
Botanical-
Fragaria L.
Plant habit Flat-Globose "Senagana"
Plant density
Medium "Gorella"
Plant vigor Strong "Grande"
Leaf:
a) Length 15-20 cm
b) Width 13-18 cm
c) Color Green Group 143 A
(RHSCC)
1) Upper Side:
Medium Green
2) Lower Side:
Medium Green
d) Blistering
Weak
e) Cross-section
Concave
f) # of leaflets
Sometimes >3
Terminal leaflet
a) Length/Width
As long as broad
ratio
b) Shape of base
Obtuse
c) Shape of teeth
Rounded
d) Length 7-9 cm
e) Width 6-8 cm
Flower
a) Size Large "Dominal".sup.c
b) Size of calyx to
Much larger
corolla
c) Size of inner calyx
Smaller
versus outer calyx
d) Spacing of petals
Overlapping
e) Petal length/width
Broader than long
to as long as
broad
f) Time of flowering
Early "Karina".sup.d
Stolon
a) Number Many "Gorella".sup.e
b) Thickness Medium
c) Pubescence
Strong
d) Anthocyanin
Absent or very
coloration weak
Petiole
a) Pose of hairs
Outwards
b) Length 7-9 cm
c) color Medium Green
Inflorescence
a) Position relative
Beneath
to foliage
Stamen Normal
Pistil Normal
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.sup.a The description of "Dorit" is based on the test guidelines for
Fragaria L. of the International Union for the Protection of New Plant
Varieties, (UPOV).
.sup.b Only characteristics which are relevant for comparing varieties ar
listed. For example, there are no varietal differences acknowledged in th
characteristic "color of lower side of leaf".
.sup.c The flower size of the "Dorit" variety is also larger than flowers
of the variety "Gorella".
.sup.d "Dorit" flowers at the end of October. One of the earliest known
varieties for comparison is "Karina", which flowers in January.
.sup.e "Dorit" still produces more runners than the comparable variety,
"Gorella".
TABLE 2
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FRUIT CHARACTERISTICS OF "DORIT".sup.a
CHARACTERISTIC DESCRIPTION
______________________________________
Time of ripening Early
Ratio of length/maximum width
Longer than broad
Primary Fruit.sup.b Bi-conical
Length 43-50 mm
Width 30-36 mm
Secondary Fruit Conical
Length 33-37 mm
Width 27-32 mm
Tertiary Fruit Ovoid
length 28-30 mm
width 25-26 mm
Size Large
Band without achenes Narrow
Unevenness of surface
Weak
Color Orange red
Evenness of color Even
Glossiness Medium
Insertion of achenes Level with surface
Insertion of calyx Level with surface
Pose of calyx segments
Reflexed
Size of calyx in relation
Same size
to fruit diameter
Adherance of calyx Strong
Firmness Medium to firm
Color of Flesh Light red
Evenness of flesh color
Even
Sweetness.sup.c Strong
Color 42 BC circa (RHSCC)
Taste.sup.c Good
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.sup.a The shape of "Dorit" fruit is similar to that of the variety
"Pajaro".
.sup.b There is a marked difference between the shape of the primary,
secondary and tertiary fruit.
.sup.c See Table 4.
TABLE 3
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COMPARATIVE YIELD OF "DORIT".sup.a
Nov. Dec. Jan. Feb. Mar. Apr.
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Dorit 30 70 100 100 100 100
Sharon.sup.b
40 60 80 80 80 80
Shalom.sup.c
50 70 80 100 100 70
Smadar.sup.d
50 70 100 100 100 50
Saaid.sup.e
0 70 100 100 100 100
Douglas.sup.f
0 0 40 150 150 150
Chandler.sup.g
0 0 30 150 150 120
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.sup.a Average yield in g/m.sup.2 in Ramat Hadar, Israel (1989-90). The
time of ripening for "Dorit" fruit is early.
.sup.b U.S. Application Ser. No. 07/735,969. The time of ripening for
"Sharon" fruit is very early.
.sup.c U.S. Application Ser. No. 07/735,695. The time of ripening for
"Shalom" fruit is early.
.sup.d U.S. Application Ser. No. 07/735,967. The time of ripening for
"Smadar" fruit is very early to early.
.sup.e U.S. Application Ser. No. 07/735,970. The time of ripening for
"Saaid" fruit is early to medium.
.sup.f U.S. Plant Pat. #4,487. The time of ripening for "Douglas" fruit i
late.
.sup.g U.S. Plant Pat. #5,262. The time of ripening for "Chandler" fruit
is late.
TABLE 4
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COMPARATIVE FRUIT CHARACTERISTICS OF "DORIT"
T.S.S..sup.a
Acidity.sup.b
in % in % Aroma Taste
______________________________________
Dorit 8.5-9.5 1.0 5 Good
Sharon.sup.c
6.5-7.0 1.0 3 Slightly
Acidic
Shalom.sup.d
8.0-9.0 1.0 4 Normal
Smadar.sup.e
8.5-9.5 1.0 5 Good
Saaid.sup.f
8.0-9.0 1.0 3 Normal
Douglas.sup.g
6.5-7.0 0.8 3 Slightly
Acidic
Chandler.sup.h
6.5-7.0 0.8 3 Slightly
Acidic
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.sup.a Total Soluble Solids expresses fruit sweetness and was determined
with a refractometer.
.sup.b Percent of acidity was determined as follows: 2 cc of juice extrac
was mixed with 20 cc of water. Five drops of fenolfthaleinen was added an
the mixture was titrated with NaOH. The percent acidity is calculated as
the quantity of NaOH (cc) .times. 0.32.
.sup.c U.S. Application Ser. No. 07/735,969.
.sup.d U.S. Application Ser. No. 07/735,695.
.sup.e U.S. Application Ser. No. 07/735,967.
.sup.f U.S. Application Ser. No. 07/735,970.
.sup.g U.S. Plant Pat. #4,487.
.sup.h U.S. Plant Pat. #5,262.
Claims
1. A new distinct variety of strawberry substantially as illustrated and described and distinguished as being able to grow in September and produce fruit starting in November and lasting until summer, with fruit having a good taste and shape and a long shelf life.
| PP4487 | November 20, 1979 | Bringhurst et al. |
| PP5262 | July 24, 1984 | Voth et al. |
| PP5263 | July 24, 1984 | Voth et al. |
| PP5264 | July 31, 1984 | Bringhurst et al. |
| PP5268 | August 7, 1984 | Voth et al. |
| PP6578 | January 31, 1989 | Voth et al. |
| PP7024 | September 12, 1989 | Johnson et al. |
| PP7127 | January 30, 1990 | Voth et al. |
| 370/82 | November 1984 | ILX |
- Howard, C. M. and Albregts, E. E., 1980; HortScience 15(4):540. Dubinsky, V., 1985; Mc.Sc. Thesis, The Hebrew University of Jerusalem; Rehovot, Israel (Hebrew original and English translation). Bringhurst, R. S. and Voth, V., 1989; Fruit Var. J 43(1):12-19. Izsak, E. (1978) Hassadeh 59:443-446. Izsak, E. and Izhar, S. (1983) Hassadeh 63:2100-2103. Izsak, E. and Izhar, S. (1984) Hassadeh 64:1774-1777. Izsak, E. and Izhar, S. (1984) Hassadeh, 64:1778-1781.
Type: Grant
Filed: Jul 25, 1991
Date of Patent: May 19, 1992
Assignee: State of Israel, Ministry of Agriculture, The Volcani Center (Bet Dagan)
Inventors: Eva Izsak (Rehovot), Shamai Izhar (Rehovot)
Primary Examiner: James R. Feyrer
Law Firm: Pennie & Edmonds
Application Number: 7/735,968
International Classification: A01H 500;
