Cherry rootstock GI 148/9
The new and distinct cultivar of cherry rootstock, which has been given the designation GI 148/9 produces a tree which is generally spreading and which upon grafting produces a dwarf tree.
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The present invention relates generally to cherry trees and more specifically to a new and distinct variety of cherry hybrid tree which is particularly useful as a rootstock.
BACKGROUND OF THE INVENTIONThe use of cherry hybrid trees as rootstock is known in the art of producing cherry trees. One such variety is F12/1, a vegetatively propagated P. avium-selection. Cherry rootstock varieties GI 148/1 and 148/8 are described in U.S. Plant Pat. Nos. 8,852 and 8,954. The use of cherry hybrid varieties as rootstock produces a dwarf tree that comes into earlier and heavier bearing without sacrificing fruit size.
SUMMARY OF THE INVENTIONThe new and distinct cultivar of cherry rootstock, which has been given the designation GI 148/9 produces a tree which is generally spreading and which upon grafting produces a dwarf tree.
BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 illustrates a branch and dormant lateral buds, bark and lenticels of GI 148/9.
FIG. 2 is a whole tree view of 148/9.
The new and distinct variety of cherry hybrid tree of the present invention was bred by the inventors as a cross of Prunus cerasus cv. "Schattenmorelle" with Prunus canescens in Giessen, Germany. It has been successfully asexually propagated by softwood cuttings at the University of Giessen in Giessen, Germany, and has been observed to remain true to the description set forth herein.
DETAILED DESCRIPITION OF THE INVENTIONGI 148/9 as used as a rootstock for sweet cherry trees induces dwarfing to a significant degree. In comparison with rootstock F12/1, GI 148/9 produces 29 percent of growth, as measured as the fresh weight of the upper tree parts of cv. "Hedelfinger" after 12 years in orchards near Giessen, Germany. Precocity, high production of fruit and yield efficiency, good fruit size and no or very few suckers were induced. GI 148/9 as a rootstock confers earlier and heavier bearing to the scion as compared to F12/1 clonal cherry rootstock. In one trial, it induced a yield in the variety "Hedelfinger" in the 5th leaf of 5.8 kg/tree (cf. F12/1:0.2 kg/tree) and in the 7th leaf of 13.8 kg/tree (cf. F12/1:5.7 kg/tree). As a mean of seven years, 100-fruit-weight of "Hedelfinger" grafted on 148/9 was 763 grams, while 100-fruit-weight of "Hedelfinger" grafted on F12/1 was 735 grams.
GI 148/9 itself is of medium vigor, has a spreading habit and long, thin partly drooping branches. After eight growing seasons near Giessen, Germany, GI 148/9 demonstrated a height of 3.40 meters and a width of 3.85 meters. It is tolerant to the virus PDV, sensitive to the virus PNRV and medium tolerant to Pfeffinger Disease Its tolerance towards water-logging and its frost-hardiness is medium.
The following varieties of sweet and sour cherries have been successfully grafted onto GI 148/9: Abels Spaete, Buttners Rote Knorpel, Grosse Schwarze Knorpel, Van, Gold, Hedelfinger, Hedelfinger Hilltop, Ulster, Valeska, Bing, Early Burlat, Emperor Francis, Konigskirsche, Meckenheimer, Oktavia, Regina, Schneiders Spate Knorpel, Stella, Windsor, Montmorency. No graft incompatibility is presently known.
Ploidy of 148/9 is probably triploid (2n=3.times.). The ploidy status of the parents has been investigated by isoenzyme analysis and is tetraploid (2n=4.times.) for the mother plant=Prunus cerasus, "Schattenmorelle", and diploid (2n=2.times.) for the father plant, Prunus canescens.
Leaves:
Overall shape.--Obvate.
Apex shape.--Acute to slightly acuminate.
Base shape.--Rounded, slightly acuminate.
Leaf serration.--Doubly serrate leaf margin.
Veination.--Pinnate, 10-12 major veins, mainly alternate.
Stipules.--Prominent, pointed, attached to base of petiole.
Glands.--Rounded, usually 3, sometimes 2 or 4 attached to bottom edge blade or petiole close to blade.
Pubescence.--Very slightly pubescent on adaxil surface (top), fairly obvious pubescent on abaxil surface especially along veins.
Color.--Light green.
Leaf dimensions at 5th and 9th:
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5th leaf
9th leaf
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Mean length of leaves
83 mm 80 mm
Mean width of leaves
42 mm 50 mm
Mean length of petioles
12 mm 10 mm
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Branches:
Thickness of one year branch.--22 mm diameters.
Color of 2-year old branch.--greyed orange, Fan 4, 173-A (R.H.S. color chart)
Overall.--1-Year old branches are very slightly pubescent, buds alternate on branch; 1-year old branches with cream colored lenticels 0.5 mm diameter.
Branch dimensions (For a single GI 148/9 plant in the ungrafted condition after the 5th leaf; in brackets, comparable data for F12/1):
Mean length of 1-year-old branches.--21.6 cm (19.8 cm).
Mean length of 2-year-old branches.--24.8 cm (35.0 cm).
Mean length of 3-year-old branches.--54.4 cm (63.2 cm).
Mean diameter of 1-year-old branches.--2.2 cm (3.4 mm).
Mean diameter of 2-year-old branches.--3.4 mm (5.8 mm).
Mean diameter of 3-year-old branches.--6.2 mm (10.1 mm).
Mean no. of branches from 2-year-old branches.--0 (0.7).
Mean no. of branches from 3-year-old branches.--2.6 (2.4).
Mean no. of nodes of 2-year-old branches.--17.4 (15.3).
Mean no. of nodes of 3-year-old branches.--20.2(22.4).
Mean angle of 3-year-old branches.--61.3 (59.7).
Mean angle of 4-year-old branches.--55.0 (58.3).
Buds: Conical, acute, adpressed, 3-4 mm long, prominent leaf scars.
Flowers:
Flowering.--Flowering started in the first year.
Abundance.--Flowering became abundant during third year.
Petal color.--White.
Petal shape.--Oblong.
Petal length/width ratio.--Approximately 1.5:1.
Bloom: Time of bloom is very late.
Overall vigor:
Ungrafted.--Medium.
Suckers.--None or very few.
Root system: A comparison of the root systems of GI 148/9 grafted "Hedelfinger" and F12/1 grafted with "Hedelfinger" is shown below in Table 1:
TABLE 1
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GI 148/9
F12/1
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Fresh Matter 26.6 103.9
(kg)/13.8 m3 soil
Dry Matter 14.7 51.3
(kg)/13.8 m3 soil
Total length of roots
1615 1379
(m)/13.8 m3 soil
Dry Matter/root length (g)
9.1 37.6
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GI 148/9 has a more dense root system than F12/1 and a much higher portion of fine roots.
Survey of growth data: Growth of one ungrafted clone, 60 kilometers south of Giessen, Germany at about 5th and 9th leaf is shown in Table 2 below:
TABLE 2
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5th leaf
9th leaf
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Height 210 340
Width (cm) 230 400
Depth (cm) 370
Fresh Weight (kg) 19.0
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In Table 3 the growth results after 12 years of GI 148/9 and F12/1, both grafted with Hedelfinger.
TABLE 3
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GI 148/9
F12/1
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Height of Crown (m) 3.0 5.2
Width of Crown (m) 4.7 6.2
Stem Cross Sectional (cm2)
245.9 503.4
Area of Variety
Stem Cross Sectional (cm2)
778.8 486.0
Area of Rootstock
Fresh Weight of Plant
54.5 726.3
Parts Above Ground
Weight in Percent 37.0 100.0
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A Crown-silhouette comparison of GI 148/9 and F12/1 (m2)=height.times.(with+depth)/2: is shown in Table 4.
TABLE 4
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GI 148/9
F12/1
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After 4 years in orchard:
3.5 7.7
After 6 years in orchard:
6.1 14.3
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Enzyme polymorphism of GI 148/2: (Studied by horizontal starch gel electrophoresis of leaf tissue of 8 loci.) are shown in Table 5.
TABLE 5
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148/9
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Aconitase-2 2
Alkoholdehydrogenase-1 7
Isocitratdehydrogenase-2
772
Leucinaminopeptisase-1 34
5-Phosphogluconat-Dehydrogenase-1
772
6-Phosphogluconat-Dehydrogenase-2
722
Phophoglucose-Isomerase-2
224
Phosphoglucomutase-2 25
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Claims
1. A new and distinct variety of cherry hybrid tree as shown and described herein.
Type: Grant
Filed: Jun 7, 1995
Date of Patent: Aug 13, 1996
Assignee: Inter-Plant Patent Marketing, Inc. (Ontario)
Inventors: Werner Gruppe (Linden/Grossen/Linden), Hanna Schmidt (Ahrensburg)
Primary Examiner: James R. Feyrer
Law Firm: Flynn, Thiel, Boutell & Tanis P.C.
Application Number: 8/485,403
International Classification: A01H 500;
