USPP13099P2 - Dogwood tree named ‘Jean's Appalachian Snow’ - Google Patents

Dogwood tree named ‘Jean's Appalachian Snow’ Download PDF

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USPP13099P2
USPP13099P2 US09/655,503 US65550300V USPP13099P2 US PP13099 P2 USPP13099 P2 US PP13099P2 US 65550300 V US65550300 V US 65550300V US PP13099 P2 USPP13099 P2 US PP13099P2
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appalachian
jean
snow
cultivar
dogwood
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Mark T. Windham
Robert N. Trigiano
Willard T. Witte
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University of Tennessee Research Foundation
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    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
    • C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
    • C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
    • C12Q1/6888—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for detection or identification of organisms
    • C12Q1/6895—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for detection or identification of organisms for plants, fungi or algae
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q2600/00—Oligonucleotides characterized by their use
    • C12Q2600/13—Plant traits
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q2600/00—Oligonucleotides characterized by their use
    • C12Q2600/16—Primer sets for multiplex assays

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  • the present invention relates to a new and distinct cultivar of flowering dogwood which is resistant to powdery mildew.
  • This dogwood is botanically known as Cornus florida and hereinafter is referred to by the cultivar name ‘Jean's Appalachian Snow’.
  • FIG. 1 Photograph of a typical flower specimen of ‘Jean's Appalachian Snow’. This photograph is a closeup view of a typical flower of this cultivar.
  • FIG. 2. A similarity index for various dogwoods.
  • FIG. 3 Cluster analysis of various dogwoods.
  • FIG. 4 Principal coordinate analysis of the relationships between the dogwoods.
  • ‘Jean's Appalachian Snow’ is a white flowering dogwood cultivar isolated from a field planting of approximately 1,100,000 Cornus florida seeds in Decherd, Tenn. Seeds were bulked from collections of wild and landcape trees from Tennesee, North Carolina, Alabama, and Georgia. This cultivar may be reproduced asexually by rooting cuttings and by grafting.
  • ‘Jean's Appalachian Snow’ has white bracts which are overlapping.
  • the bracts are similar in size to the bracts of ‘Cherokee Princess’.
  • Clefts at the ends of the bracts are indented and have little pigmentation.
  • Control plants were (a) Cornus florida seedlings, (b) ‘Cherokee Sunset', or (c) ‘Cherokee Daybreak' that were of similar age and size. 2 ‘Cherokee Brave' is a pink flowering dogwood cultivar which is the only cultivar known to the inventors to possess partial resistance to powdery mildew.
  • DNA amplification fingerprinting was used to type ‘Jean's Appalachian Snow’, ‘Kay's Appalachian Mist’, and ‘Karen's Appalachian Blush’.
  • the methodology followed that of Trigiano and Caetano-Anollés (HortTechnology, 8:413-423 [1998]).
  • Data obtained from 235 loci generated from genomic DNA using seven (7) arbitrary octomeric primers, was used to compare the powdery mildew resistant dogwoods of the subject application to other dogwoods (including powdery mildew resistant lines and cultivars commonly found in nurseries).
  • the sequences of the primers were as follows: 1) GAGCCTGT, 2) GTTACGCC, 3) CTGTGAG, 4) GTAACGCC, 5) GACGTAGG, 6) GATCGCAG, and 7) GTATCGCC.
  • DNA amplification fingerprinting analysis as well as the cluster and principal coordinate analysis were completed using the NTSYS PROGRAM, pc version 2.2 (Exeter Software, 100 N. Country Road, Sedtauket, N.Y. 11733). A similarity index is provided in FIG. 2 .
  • FIG. 3 depicts the resulting cluster analysis.
  • FIG. 4 depicts the principal coordinate analysis of the relationships between the dogwoods.
  • Botanical classification Cornus florida , cultivar Jean's Appalachian Snow.
  • Type. Terminal softwood cuttings.
  • Rooting hormone 5,000-10,000 ppm; Five (5) second quick dip in DIP ‘N’ GROW (1% IBA, 0.5% NAA), (Dip ‘N’ Grow, Inc., Clackamas, Oreg.).
  • Plant form and growth habit Perennial deciduous tree, mostly upright with horizontal branching.
  • Vigor. Similar to other Cornus florida cultivars.
  • Branching habit Moderate, branch crotch angles of about 30-45° to main trunk.
  • Branch angle of about 50° with a range of 47°-55°.
  • Petiole length ( cm ).—About 1.1 ⁇ 1.24 ⁇ 1.5 (n 5).
  • Petiole diameter ( mm ).—About 1.23 ⁇ 1.29 ⁇ 1.37 (n 5).
  • Shape Broadly ovate.
  • Bipolar trichomes Upper surface ( ⁇ ) — sparse; 6 ⁇ 6.9 ⁇ 12. Lower surface ( ⁇ ) — dense; 8 ⁇ 11.9 ⁇ 16.
  • Inflorescence diameter About 32 cm wide.
  • Stamens. Typically 4.
  • Petal color ( abaxial and adaxial surfaces ).—Yellow green 151B.
  • Ovary. Bilocular with each locule having 1 ovule.
  • Berry type. Drupe (about 14 mm by 7 mm) aggregated in one mass.

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Abstract

A new and distinct cultivar of Dogwood tree, Cornus florida, named ‘Jean's Appalachian Snow’, is provided. This cultivar is characterized by resistance to powdery mildew which is superior to any other white flowering dogwood.

Description

CROSS-REFERENCE TO A RELATED APPLICATION
This application claims the benefit of U.S. Provisional Application No. 60/210,603, filed Jun. 9, 2000.
BACKGROUND OF THE INVENTION
The present invention relates to a new and distinct cultivar of flowering dogwood which is resistant to powdery mildew. This dogwood is botanically known as Cornus florida and hereinafter is referred to by the cultivar name ‘Jean's Appalachian Snow’.
This new dogwood cultivar was discovered in a field planting of approximately 1,100,000 Cornus florida seeds in Decherd, Tenn. in 1994. ‘Jean's Appalachian Snow’ is a white flowering dogwood which, to the knowledge of the inventors, is superior to any other white flowering dogwood cultivar with respect to powdery mildew resistance. Asexual reproduction of ‘Jean's Appalachian Snow’ by terminal cuttings rooted at the Tennessee Agricultural Experiment Station in Knoxville, Tenn. has shown that the unique features of this new dogwood cultivar are stable and reproduced true to type in successive vegetative generations.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1. Photograph of a typical flower specimen of ‘Jean's Appalachian Snow’. This photograph is a closeup view of a typical flower of this cultivar.
FIG. 2. A similarity index for various dogwoods.
FIG. 3. Cluster analysis of various dogwoods.
FIG. 4. Principal coordinate analysis of the relationships between the dogwoods.
Flower colors in the photographs may differ from the actual colors due to light reflectance.
DETAILED DESCRIPTION OF THE NEW VARIETY
The parental lineage of this cultivar is unknown. ‘Jean's Appalachian Snow’ is a white flowering dogwood cultivar isolated from a field planting of approximately 1,100,000 Cornus florida seeds in Decherd, Tenn. Seeds were bulked from collections of wild and landcape trees from Tennesee, North Carolina, Alabama, and Georgia. This cultivar may be reproduced asexually by rooting cuttings and by grafting.
‘Jean's Appalachian Snow’ has white bracts which are overlapping. The bracts are similar in size to the bracts of ‘Cherokee Princess’. Upper pairs of bracts average about 15.8 cm long by about 11.2 cm wide in size (n=30). Clefts at the ends of the bracts are indented and have little pigmentation. Flower petals are yellow and flowers average 23 per inflorescence (n=15).
‘Jean's Appalachian Snow’ is, to the knowledge of the inventors, superior in resistance to powdery mildew to any other white flowering dogwood cultivar. This cultivar has been tested for four (4) years. Test plants were exposed to powdery mildew and assessed for resistance to powdery mildew. Mildew scores for ‘Jean's Appalachian Snow’, control plants, and ‘Cherokee Brave’ were obtained using the following scale: 0=healthy; 1=≦2% of foliage with signs or symptoms of powdery mildew; 2=≦10% of foliage with signs or symptoms of powdery mildew; 3=≦25% of foliage with signs or symptoms of powdery mildew; 4=≦50% of foliage with signs or symptoms of powdery mildew; 5=≦75% of foliage with signs or symptoms of powdery mildew; 6=≦100% of foliage with signs or symptoms of powdery mildew. Table 1 presents the data obtained over the last four years.
Year ‘Jean's Appalachian Snow' Control Score1 ‘Cherokee Brave'2
1995 0.0 5.0 (a) —
1996 0.0 5.0 (b) 1.2
1997 0.0 4.6 (b) 2.3
1998 0.0 4.8 (c) 2.1
1Control plants were (a) Cornus florida seedlings, (b) ‘Cherokee Sunset', or (c) ‘Cherokee Daybreak' that were of similar age and size.
2‘Cherokee Brave' is a pink flowering dogwood cultivar which is the only cultivar known to the inventors to possess partial resistance to powdery mildew.
DNA amplification fingerprinting was used to type ‘Jean's Appalachian Snow’, ‘Kay's Appalachian Mist’, and ‘Karen's Appalachian Blush’. The methodology followed that of Trigiano and Caetano-Anollés (HortTechnology, 8:413-423 [1998]). Data, obtained from 235 loci generated from genomic DNA using seven (7) arbitrary octomeric primers, was used to compare the powdery mildew resistant dogwoods of the subject application to other dogwoods (including powdery mildew resistant lines and cultivars commonly found in nurseries). The sequences of the primers were as follows: 1) GAGCCTGT, 2) GTTACGCC, 3) CTGTGAG, 4) GTAACGCC, 5) GACGTAGG, 6) GATCGCAG, and 7) GTATCGCC. DNA amplification fingerprinting analysis as well as the cluster and principal coordinate analysis were completed using the NTSYS PROGRAM, pc version 2.2 (Exeter Software, 100 N. Country Road, Sedtauket, N.Y. 11733). A similarity index is provided in FIG. 2. FIG. 3 depicts the resulting cluster analysis. FIG. 4 depicts the principal coordinate analysis of the relationships between the dogwoods.
The abbreviations found in the Figures are as follows: AS=‘Appalachian Spring’, KAM=‘Kay's Appalachian Mist’, JAS=‘Jean's Appalachian Snow’, C9=‘Cloud Nine’, KAB=‘Karen's Appalachian Blush’, CP=‘Cherokee Princess’, SPR=‘Springtime’ and CB=‘Cherokee Brave’. All are white bract dogwoods except CB, which is red.
DETAILED BOTANICAL DESCRIPTION
The following observations, measurements, and comparisons describe the cultivar grown in Knoxville, Tenn. under container nursery conditions which approximate commercial production conditions. Dogwoods used for this description were about six (6) years old and were grown in twenty-five (25) gallon containers. Plant hardiness is expected to be zones 5-9.
The following description uses color references to The Royal Horticultural Society Colour Chart, except where general terms of ordinary dictionary significance are used. All color ratings were on adaxial surfaces. Color ratings for abaxial surfaces were not obtained because reflected/refracted light, due to the density of pubescence on abaxial surfaces, made accurate color determinations difficult or impossible. Measurements are provided as a range with the middle value providing the average (lower limit<average value<upper limit).
Botanical classification: Cornus florida, cultivar Jean's Appalachian Snow.
Parentage: Unknown.
Propagation:
Type.—Terminal softwood cuttings.
Time to initiate roots (in June).—About 3-4 weeks at about 25-30° C.
Rooting hormone.—5,000-10,000 ppm; Five (5) second quick dip in DIP ‘N’ GROW (1% IBA, 0.5% NAA), (Dip ‘N’ Grow, Inc., Clackamas, Oreg.).
Intermittent mist.—Six (6) seconds every six (6) minutes; light: 30-50% shade over propagation bench.
Media.—Peat-perlite.
Rooting habit.—Profuse from base of cutting.
Plant description:
Plant form and growth habit.—Perennial deciduous tree, mostly upright with horizontal branching.
Plant size.—A six (6) year old tree will attain a height of about 200 cm and a width of about 130 cm.
Vigor.—Similar to other Cornus florida cultivars.
Branching habit.—Moderate, branch crotch angles of about 30-45° to main trunk.
Main stem/trunk description.—Diameter: About 3.1 cm; bark texture: smooth; bark color: gray 201C.
Lateral branch description.—Branch angle of about 50° with a range of 47°-55°.
Foliage description:
Arrangement.—Simple, opposite; leaves mostly crowded towards branch apices.
Leaf blade length (cm).—About 12.8<13.8<15.5 (n=5).
Leaf blade width (cm).—About 7.0<8.4<9.0 cm (n=5).
Petiole length (cm).—About 1.1<1.24<1.5 (n=5).
Petiole diameter (mm).—About 1.23<1.29<1.37 (n=5).
Shape.—Broadly ovate.
Apex.—Acuminate, leaf tip with 90° twist.
Base.—Mostly acute, about 10% are unequal.
Margin.—Entire, slightly undulate.
Leaf vein pairs.—5.5-6, opposite to alternate. Petiole reflexed 80-90% from plane of leaf blade.
Bipolar trichomes.—Upper surface (μ) — sparse; 6<6.9<12. Lower surface (μ) — dense; 8<11.9<16.
Texture.—Upper surface: Nearly glabrous. Lower surface: Leaf hairs — on veins, and vein axils (μ), 16<22.1<38.
Color.—Yellow green 144B.
Flower description:
Fragrance.—None observed.
Flower bud size.—Width: 8.2 mm (widest diameter). Length: 6.5 mm (base to tip).
Shape of involucral bracts.—Obovate.
Apex shape of involucral bracts.—Emarginate.
Base shape of involucral bracts.—Cuneate.
Number of bracts.—4 (in two pairs).
Natural flowering season.—1999: about 15 days (April 12 through April 27). 2000: about 19 days (April 6 though April 25). 2001: about 14 days (April 14 through April 27).
Inflorescence arrangement.—Typical for species, large bracts overlap.
Inflorescence diameter.—About 32 cm wide.
Bract dimensions.—Upper bracts 15.8 cm long by about 11.2 cm wide (n=30). Inflorescence is 6.8 mm wide; anther length is 1.4 mm. Floral development is asynchronous among inflorescence.
Color (abaxial and adaxial surfaces).—White bracts (155D); bract clefts have, either no pigmentation or little pigmentation of yellow green (150B) color.
Sepals.—Typically 4.
Stamens.—Typically 4.
Pistil.—Typically 1.
Petal color (abaxial and adaxial surfaces).—Yellow green 151B.
Flower number.—22.
Ovary.—Bilocular with each locule having 1 ovule.
Fruit description:
Berry type.—Drupe (about 14 mm by 7 mm) aggregated in one mass.
Color.—5R({fraction (5/10)}) using Munsell Color Chart for Plant Tissues (Munsell Color, Baltimore, Md. 21218).
Seed.—Typical for species.
Disease resistance: this cultivar demonstrated outstanding resistance to powdery mildew superior to that of any other white flowering dogwood cultivar known to the inventors. No susceptibility to other diseases or arthropod pests was observed.

Claims (1)

What is claimed is:
1. A new and distinct cultivar of Dogwood tree, Cornus florida, named ‘Jean's Appalachian Snow’, as illustrated and described.
US09/655,503 2000-06-09 2000-09-05 Dogwood tree named ‘Jean's Appalachian Snow’ Expired - Lifetime USPP13099P2 (en)

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US09/654,765 Expired - Lifetime USPP13165P2 (en) 2000-06-09 2000-09-05 Dogwood tree named ‘Karen's Appalachian Blush’
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070150992P1 (en) * 2005-12-22 2007-06-28 Trigiano Robert N Dogwood tree named 'Missy's Appalachian Morning'
USPP18238P3 (en) 2005-12-22 2007-11-20 University Of Tennessee Research Foundation Dogwood tree named ‘Appalachian Joy’
US20110138509P1 (en) * 2009-12-03 2011-06-09 Jeff Jones Flowering dogwood tree named 'nm1'

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USPP13098P2 (en) 2000-06-09 2002-10-22 University Of Tennessee Research Corporation Dogwood tree named ‘Kay's Appalachian Mist’
PL2247751T3 (en) 2008-02-04 2023-04-11 Hazera Seeds Ltd. Disease resistant pepper plants

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070150992P1 (en) * 2005-12-22 2007-06-28 Trigiano Robert N Dogwood tree named 'Missy's Appalachian Morning'
USPP18238P3 (en) 2005-12-22 2007-11-20 University Of Tennessee Research Foundation Dogwood tree named ‘Appalachian Joy’
USPP18292P3 (en) 2005-12-22 2007-12-11 University Of Tennessee Research Foundation Dogwood tree named ‘Missy's Appalachian Morning’
US20110138509P1 (en) * 2009-12-03 2011-06-09 Jeff Jones Flowering dogwood tree named 'nm1'
USPP22089P3 (en) 2009-12-03 2011-08-23 Jeff Jones Flowering dogwood tree named ‘NM1’

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WO2001094643A3 (en) 2002-07-11
US6677510B2 (en) 2004-01-13
USPP13165P2 (en) 2002-11-05
AU2001275459A1 (en) 2001-12-17

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