USPP11719P - Apple tree named `Pi 80 Select` - Google Patents

Apple tree named `Pi 80 Select` Download PDF

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Publication number
USPP11719P
USPP11719P US08/869,069 US86906997V US11719P US PP11719 P USPP11719 P US PP11719P US 86906997 V US86906997 V US 86906997V US 11719 P US11719 P US 11719P
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select
variety
rootstock
rooting
apple
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US08/869,069
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Manfred Fischer
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SACHSISCHE LANDESANSTALT fur LANDWIRTSCHAFT
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
    • A01H6/00—Angiosperms, i.e. flowering plants, characterised by their botanic taxonomy
    • A01H6/74—Rosaceae, e.g. strawberry, apple, almonds, pear, rose, blackberries or raspberries
    • A01H6/7418—Malus domestica, i.e. apples
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
    • A01H5/00—Angiosperms, i.e. flowering plants, characterised by their plant parts; Angiosperms characterised otherwise than by their botanic taxonomy
    • A01H5/08—Fruits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/44—Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44641—Clasp, clip, support-clamp, or required component thereof having gripping member formed from, biased by, or mounted on resilient member
    • Y10T24/44684—Clasp, clip, support-clamp, or required component thereof having gripping member formed from, biased by, or mounted on resilient member with operator for moving biased engaging face
    • Y10T24/44692—Camming or wedging element

Definitions

  • the present invention comprises a new and distinct variety of apple tree (Malus pumila mill), referred to by the varietal name ⁇ Pi 80 Select ⁇ .
  • the ⁇ Pi 80 ⁇ variety is the result of a cross of ⁇ M9 ⁇ and ⁇ M4 ⁇ .
  • the original plant of the ⁇ Pi 80 select ⁇ variety is the result of a mutation of the ⁇ Pi 80 ⁇ variety.
  • the ⁇ Pi 80 select ⁇ variety was originally asexually propagated using the stoolbed layering method in Dresden Germany.
  • the ⁇ Pi 80 Select ⁇ variety is believed to be a naturally occurring mutation of ⁇ Pi 80 ⁇ .
  • ⁇ Pi 80 Select ⁇ has not been observed under all possible environmental conditions.
  • the phenotype may vary significantly with variations in environment such as temperature, light intensity, and daylength, without any variation in genotype.
  • the following combination of traits have been repeatedly observed in asexually propagated progeny of the ⁇ Pi 80 Select ⁇ variety and are determined to be the basic characteristics of this variety and distinguish this variety as a new and distinct variety of apple tree: (1) dwarfing when used as a rootstock; (2) excellent compatibility with a number of different apple cultivars; (3) good propagability; (4) sufficient mechanical strength for vigorous scion varieties; and (5) excellent rooting characteristics.
  • the new variety is readily identified by the uniformity of these characteristics.
  • FIG. 1 is a view of a row of trees of ⁇ Pi 80 Select ⁇ .
  • FIG. 2 is a view of a typical twig and leaves of ⁇ Pi 80 Select ⁇ .
  • FIG. 3 is a view of a branch of ⁇ Pi 80 Select ⁇ .
  • FIG. 4 is a view of roots of plants of the ⁇ Pi 80 Select ⁇ variety in comparison to roots of plants of the ⁇ M9 ⁇ variety obtained by layering and which were grown under similar growing conditions at a nursery in McMinnville, Oreg.
  • FIG. 5 is a view of a branch from the ⁇ Pi 80 Select ⁇ variety that shows several blossoms.
  • ⁇ Pi 80 ⁇ was selected and asexually propagated. ⁇ Pi 80 ⁇ does not have excellent rooting properties. I selected ⁇ Pi 80 Select ⁇ as a better layering plant than ⁇ Pi 80 ⁇ , and ⁇ Pi 80 Select ⁇ was asexually propagated under my direction and control. ⁇ Pi 80 Select ⁇ is a dwarfing rootstock suitable for intensive to semi-intensive planting systems and displays a number of advantages over other apple rootstocks as discussed below.
  • FIG. 4 shows a direct comparison of plants of the ⁇ Pi 80 Select ⁇ variety and of the ⁇ M 9 ⁇ variety obtained by layering, and shows the difference in rooting of these plants.
  • Table 1 shows a comparison of the performance of ⁇ Pi 80 ⁇ and ⁇ Pi 80 Select ⁇ in stoolbed propagation by layering with ⁇ M 9 ⁇ , ⁇ M 4 ⁇ , and ⁇ MM 106 ⁇ .
  • ⁇ Pi 80 Select ⁇ exhibits a better rooting system than ⁇ Pi 80 ⁇ .
  • ⁇ Pi 80 Select ⁇ has more root primordia under the bark than the ⁇ Pi 80 ⁇ variety. Observations are of virus free plants of both varieties and thus the better rooting capacity of ⁇ Pi 80 Select ⁇ is not connected with the virus status of the plants.
  • ⁇ Pi 80 Select ⁇ in McMinnville, Oreg. has also confirmed the rooting superiority of this variety. For example, under like growing conditions, the ⁇ Pi 80 Select ⁇ variety has rooting which has been observed to be about four times better than ⁇ M9 ⁇ . This is consistent with the comparison between ⁇ Pi 80 Select ⁇ and ⁇ M9 ⁇ set forth in the lower portion of Table 1 above. The comparision of ⁇ Pi 80 ⁇ to ⁇ M9 ⁇ set forth in the upper portion of Table 1 above shows that the ⁇ Pi 80 ⁇ is not nearly as strong a rooting plant.
  • the length of rootstocks in inches was: 11.4 inches for ⁇ Pi 80 Select ⁇ , 7 inches for ⁇ M 26 ⁇ and 4.4 inches for ⁇ M9 ⁇ (337 clone).
  • the number of rooting nodes per plant was: 11 nodes for ⁇ Pi 80 Select ⁇ , 5 nodes for ⁇ M9 ⁇ (337 clone) and 4 nodes for ⁇ M26 ⁇ . Again, the superior rooting capability of ⁇ Pi 80 Select ⁇ is confirmed.
  • Table 2 shows the specific yield and growing capacity (crown volume as a percentage of ⁇ M 26 ⁇ ) of a variety of apple cultivars grafted as scions to ⁇ Pi 80 Select ⁇ , ⁇ M 4 ⁇ , ⁇ M 26 ⁇ and ⁇ MM 106 ⁇ rootstock. Apple scions grown on ⁇ Pi 80 Select ⁇ rootstock display similar growing capacity but higher specific yield than when grown on ⁇ M 26 ⁇ rootstock.
  • Table 5 shows the results of a test program to evaluate the hardening, dehardening, and rehardening capacity of ⁇ Pi 80 Select ⁇ and other rootstocks.
  • ⁇ Pi 80 Select ⁇ is not highly frost-resistant but has a good reaction ability, i.e., the physiological state can rapidly change as the temperature changes, especially as the temperature drops below freezing. By contrast, continental types have a poor reaction ability and die.
  • ⁇ Pi 80 Select ⁇ also has a good stability of hardening. In stoolbeds the rate of loss of ⁇ Pi 80 Select ⁇ resulting from strong winters was low and no problems were encountered in orchards.
  • Propagation Holds to distinguishing characteristics through succeeding propagation.
  • Leaves.--Leaf stem Leaf stem color like R.H.S. 144D. Size: Medium to large. Shape: Rounded. Color: Dark green to green, more specifically, upper leaf color like R.H.S. 137B and lower leaf color like R.H.S. 138B. Margin: Serrate. Petiole: Medium, straight.
  • Sepal.--Green like R.H.S. 138B
  • pubescent
  • Anchorage Better than ⁇ M 9 ⁇ , similar to ⁇ M 26 ⁇ .

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physiology (AREA)
  • Botany (AREA)
  • Developmental Biology & Embryology (AREA)
  • Environmental Sciences (AREA)
  • Natural Medicines & Medicinal Plants (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)

Abstract

A new and distinct variety of apple rootstock named `Pi 80 Select` characterized by (1) dwarfing when used as a rootstock; (2) excellent compatibility with a number of different apple cultivars; (3) good propagability; (4) sufficient mechanical strength for vigorous scion varieties; and (5) strong rooting capacity.

Description

BACKGROUND OF THE INVENTION
The present invention comprises a new and distinct variety of apple tree (Malus pumila mill), referred to by the varietal name `Pi 80 Select`.
The `Pi 80` variety is the result of a cross of `M9` and `M4`. The original plant of the `Pi 80 select` variety is the result of a mutation of the `Pi 80` variety. The `Pi 80 select` variety was originally asexually propagated using the stoolbed layering method in Dresden Germany.
The `Pi 80 Select` variety is believed to be a naturally occurring mutation of `Pi 80`. `Pi 80 Select` has not been observed under all possible environmental conditions. The phenotype may vary significantly with variations in environment such as temperature, light intensity, and daylength, without any variation in genotype. However, the following combination of traits have been repeatedly observed in asexually propagated progeny of the `Pi 80 Select` variety and are determined to be the basic characteristics of this variety and distinguish this variety as a new and distinct variety of apple tree: (1) dwarfing when used as a rootstock; (2) excellent compatibility with a number of different apple cultivars; (3) good propagability; (4) sufficient mechanical strength for vigorous scion varieties; and (5) excellent rooting characteristics. The new variety is readily identified by the uniformity of these characteristics.
Asexual reproduction through succeeding generations shows that these characteristics are extablished and transmitted through succeeding asexual propagations.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a view of a row of trees of `Pi 80 Select`.
FIG. 2 is a view of a typical twig and leaves of `Pi 80 Select`.
FIG. 3 is a view of a branch of `Pi 80 Select`.
FIG. 4 is a view of roots of plants of the `Pi 80 Select` variety in comparison to roots of plants of the `M9` variety obtained by layering and which were grown under similar growing conditions at a nursery in McMinnville, Oreg.
FIG. 5 is a view of a branch from the `Pi 80 Select` variety that shows several blossoms.
DETAILED DESCRIPTION
The following is a detailed description of the `Pi 80 Select` variety based on plants produced and observed under orchard conditions at the Genbank Obst Dresden-Pillnitz at the Institut fur Pflanzengenetik und Kulturpflanzenforschung Gatersleben, Germany and in McMinnville, Oreg.
Color references are made in accordance with The Royal Horticultural Society (R.H.S.) standards, except where general color terms of ordinary dictionary significance is obvious.
In order to improve the stoolbed and fruit-growing characteristics of European apple rootstocks by breeding and clonal selection, the cross `M 9`×`M 4` (pollen parent) was performed, resulting in a population of seedlings. The best seedlings were cloned (vegetatively propagated) and tested in the stoolbed for compatibility with various apple cultivars, including Laxtons Superb, Berlepsch, and Boskoop. Later, the clones were tested in the field for pomological performance and compatibility with Alkmene, Auralia, Carola, Golden Delicious, James Grieve, Jonathan, and Ontario. Pomological testing was preformed under a minimal pruning regime.
Of these clones, `Pi 80` was selected and asexually propagated. `Pi 80` does not have excellent rooting properties. I selected `Pi 80 Select` as a better layering plant than `Pi 80`, and `Pi 80 Select` was asexually propagated under my direction and control. `Pi 80 Select` is a dwarfing rootstock suitable for intensive to semi-intensive planting systems and displays a number of advantages over other apple rootstocks as discussed below.
Propagability. The performance of `Pi 80 Select` with respect to layering was improved significantly by soil improvement using wood shavings. FIG. 4 shows a direct comparison of plants of the `Pi 80 Select` variety and of the `M 9` variety obtained by layering, and shows the difference in rooting of these plants. Table 1 shows a comparison of the performance of `Pi 80` and `Pi 80 Select` in stoolbed propagation by layering with `M 9`, `M 4`, and `MM 106`.
              TABLE 1                                                     
______________________________________                                    
Stoolbed performance of `Pi 80` and `P 80 Select`                         
(2 sites, 5 years)                                                        
          Rooted layers                                                   
                      % Rooted  Evaluation of                             
          for field   layers for                                          
                                rooting                                   
Rootstock no./year    field planting                                      
                                (1-5)*                                    
______________________________________                                    
Pi 80 normal propagation techniques                                       
Pi 80     2.5         56        2.2                                       
M 9       1.6         48        1.2                                       
M 4       2.9         51        1.4                                       
MM 106    3.8         72        2.3                                       
Pi 80 Select, soil improved with wood shavings                            
Pi 80 Select                                                              
          15.0        78        3.2                                       
M 9       3.2         68        2.0                                       
M 4       14.2        56        2.7                                       
MM 106    8.4         71        2.7                                       
______________________________________                                    
 *1 = no rooting, 5 = very good rooting
`Pi 80 Select` exhibits a better rooting system than `Pi 80`. `Pi 80 Select` has more root primordia under the bark than the `Pi 80` variety. Observations are of virus free plants of both varieties and thus the better rooting capacity of `Pi 80 Select` is not connected with the virus status of the plants.
Observations of `Pi 80 Select` in McMinnville, Oreg. has also confirmed the rooting superiority of this variety. For example, under like growing conditions, the `Pi 80 Select` variety has rooting which has been observed to be about four times better than `M9`. This is consistent with the comparison between `Pi 80 Select` and `M9` set forth in the lower portion of Table 1 above. The comparision of `Pi 80` to `M9` set forth in the upper portion of Table 1 above shows that the `Pi 80` is not nearly as strong a rooting plant.
In a specific comparison of plants showing under like growing conditions in stool beds in McMinnville, Oreg., the length of rootstocks in inches (averages of ten roots and three plants) was: 11.4 inches for `Pi 80 Select`, 7 inches for `M 26` and 4.4 inches for `M9` (337 clone). In addition, the number of rooting nodes per plant (averaged from ten plants) was: 11 nodes for `Pi 80 Select`, 5 nodes for `M9` (337 clone) and 4 nodes for `M26`. Again, the superior rooting capability of `Pi 80 Select` is confirmed.
Observations of `Pi 80 Select` plants growing in stool beds in McMinnville, Oreg. has indicated that the differences in rooting of the `Pi 80 Select` variety is not a matter of juvenility. Contrary to what one would expect of a plant exhibiting juvenile characteristics, the observed `Pi 80 Select` plants have few side shoots, lack spikes or spines, have a relatively short internode distance between buds, have rooting which improves as the `Pi 80 Select` plants age, and have not been observed to exhibit suckering.
Growing Capacity and Yield. Table 2 shows the specific yield and growing capacity (crown volume as a percentage of `M 26`) of a variety of apple cultivars grafted as scions to `Pi 80 Select`, `M 4`, `M 26` and `MM 106` rootstock. Apple scions grown on `Pi 80 Select` rootstock display similar growing capacity but higher specific yield than when grown on `M 26` rootstock.
              TABLE 2                                                     
______________________________________                                    
Yield and growing capacity of apple rootstocks                            
         Specific yield                                                   
          Crown Volume          Crown volume                              
Rootstock (kg/m.sup.3) % of M 26                                          
                                % of M 26                                 
______________________________________                                    
Cultivars `Alkmene`, `Jonathan`, `Golden Delicious`, `Auralia`            
(3 sites, 8 years)                                                        
Pi 80 Select                                                              
          3.4          103      96                                        
M 4       2.5          76       157                                       
M 26      3.3          100      100                                       
MM 106    2.9          88       145                                       
Cultivar `Alkmene` (1 site, 11 years)                                     
Pi 80 Select                                                              
          6.1          127      103                                       
M 4       3.9          81       133                                       
M 26      4.8          100      100                                       
MM 106    5.6          117      148                                       
Cultivars `Golden Delicious`, `James Grieve`, `Carola`, `Ontario`         
(2 sites, 11 years)                                                       
Pi 80 Select                                                              
          3.9          105      90                                        
M 4       3.5          95       148                                       
M 26      3.7          100      100                                       
MM 106    4.0          108      139                                       
Cultivar `Golden Delicious` (1 site, 12 years)                            
Pi 80 Select                                                              
          6.6          129      102                                       
M 4       5.4          106      121                                       
M 26      5.1          100      100                                       
MM 106    6.3          123      108                                       
______________________________________
Another measure of growing capacity of rootstocks is the man-hours required for pruning of cultivars. Table 3 shows expenditures for pruning `Pi 80 Select`, `M 4`, `M 26`, and `MM 106` trees between the fourth and sixth years (`M 26`=100 percent).
Resistance to biotic damage. No problems were observed with scab, wooly aphids, and Phytophtora when `Pi 80 Select` was grown in stoolbed and under orchard conditions. `Pi 80 Select` is weakly susceptible to mildew and as susceptible to fireblight as `M 26`. Suckers were very seldom observed as a source of dangerous infections in the orchard.
Table 4 shows resistance of `Pi 80 Select` and other rootstocks to fire blight (1.0=susceptible, 9.0=highly resistant) in tests in which the rootstocks were artifically infected in greenhouses.
              TABLE 3                                                     
______________________________________                                    
Relative man-hours required for pruning of cropping tree                  
of between years 4 and 6 (M 26 = 100)                                     
          Cuttings     Cuttings  Cut wood                                 
          by saw       by scissors                                        
                                 kg/tree                                  
Rootstock (% of M 26)  (% of M 26)                                        
                                 (% of M 26)                              
______________________________________                                    
Pi 80 Select                                                              
          114          107       109                                      
M 4       196          145       217                                      
M 26      100          100       100                                      
MM 106    165          126       158                                      
______________________________________                                    

              TABLE 4                                                     
______________________________________                                    
Resistance to fire blight*                                                
         Resistance evaluation                                            
Rootstock  Test 1       Test 2  Test 3                                    
______________________________________                                    
Pi 80 Select                                                              
           3.3          1.9     2.3                                       
M 4        3.8          1.5     6.9                                       
M 9        1.0          1.0     3.1                                       
M 11       1.0          1.3     --                                        
MM 106     2.2          2.4     4.4                                       
MM 111     --           --      6.6                                       
Budagovskij 9                                                             
           --           --      2.6                                       
A 2        --           --      2.4                                       
M 26       --           --      2.3                                       
______________________________________                                    
 *1.0 = susceptible, 9.0 = highly resistant.
Resistance to frost and freezing. Table 5 shows the results of a test program to evaluate the hardening, dehardening, and rehardening capacity of `Pi 80 Select` and other rootstocks. `Pi 80 Select` is not highly frost-resistant but has a good reaction ability, i.e., the physiological state can rapidly change as the temperature changes, especially as the temperature drops below freezing. By contrast, continental types have a poor reaction ability and die. `Pi 80 Select` also has a good stability of hardening. In stoolbeds the rate of loss of `Pi 80 Select` resulting from strong winters was low and no problems were encountered in orchards.
              TABLE 5                                                     
______________________________________                                    
Winter frost resistance after artificial freezing*                        
        Hardening                                                         
                 Hardening                                                
                          Hardening                                       
                                 De-    Re-                               
Rootstock                                                                 
        rate     intensity                                                
                          stability                                       
                                 hardening                                
                                        hardening                         
______________________________________                                    
Pi 80 Select                                                              
        7.4      5.8      7.4    6.9    7.6                               
Supporter 1                                                               
        8.8      5.0      5.3    3.2    8.5                               
Supporter 2                                                               
        7.2      5.4      7.2    7.2    7.0                               
M 4     7.1      8.5      6.0    6.4    7.3                               
M 9     5.2      6.0      7.1    6.8    6.1                               
______________________________________                                    
 *1.0 = very susceptible, 9.0 = very hard.
All trees of the new variety, insofar as I have been able to observe them, have been identical in all the characteristics described below. The description is of young trees on their own roots.
Propagation: Holds to distinguishing characteristics through succeeding propagation.
Parentage: Believed to be a mutation of `Pi 80`.
Locality where grown and observed: Genbank Obst Dresden-Pillnitz at the Institut fur Pflanzengenetik und Kulturpflanzenforschung Gatersleben, Germany and McMinnville, Oreg.
Tree:
Size.--Medium, like `M26`.
Vigor.--Medium (see Table 1).
Habit.--Wide, rounded.
Trunk.--Smooth, not cracked (young trees).
Branches.--Wide angled, small group of dense branches in the crown.
Bud.--Bud color like R.H.S. 201D.
Internodes.--Medium (2-4 cm).
Lenticels.--Few (1-2 per cm), small to very small, light brown.
Shoot.--1 year shoot color like R.H.S. 148B, and 2 year shoot color like R.H.S. 195A.
Leaves.--Leaf stem: Leaf stem color like R.H.S. 144D. Size: Medium to large. Shape: Rounded. Color: Dark green to green, more specifically, upper leaf color like R.H.S. 137B and lower leaf color like R.H.S. 138B. Margin: Serrate. Petiole: Medium, straight.
Flowers:
Diameter.--One and one-half inches.
Petals.--Five.
Color.--Open bloom white with pink borders (like R.H.S. 155C). Closed bloom red-purple (like R.H.S. 62A).
Sepal.--Green (like R.H.S. 138B), pubescent.
Pistil.--Stigma: Bulbous on top.
Anthers.--13-15 single row. Pale yellow (like R.H.S. 9C).
Fragrance.--Very light.
Bloom date.--Approximately April 15 to April 23, when observed in the spring of the year 2000 in plants grown in a propagation bed at Weil Farms, Dundee Oreg.
Fruit of cultivars grafted onto `Pi 80 Select` root stock:
Skin coloration.--Better than on `M 26` or `MM 106`, similar to `M 9`: more red in the overcolor and/or more yellow as green in the ground color.
Storability.--Better than `M 9` and `M 26`, similar to `M 7`.
Compatibility: Excellent, better than `M 26`.
Growing capacity: Similar to `M 26`, dependent on the cultivar.
Yield capacity: Better than `M 26` and `MM 106`, lower than `M 9`.
Anchorage: Better than `M 9`, similar to `M 26`.
Resistance to biotic damage: Good resistance to winter frost, no problems with wooly aphids, crown gall and scab, weakly susceptible to mildew. Tolerant to Phytophthora cactorium.

Claims (1)

I claim:
1. A new and distinct variety (`Pi 80 Select`) of apple tree substantially as herein shown and described.
US08/869,069 1997-06-04 1997-06-04 Apple tree named `Pi 80 Select` Expired - Lifetime USPP11719P (en)

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