U.S. patent number PP13,098 [Application Number 09/655,512] was granted by the patent office on 2002-10-22 for dogwood tree named `kay's appalachian mist`.
This patent grant is currently assigned to University of Tennessee Research Corporation. Invention is credited to Robert N. Trigiano, Mark T. Windham, Willard T. Witte.
United States Patent |
PP13,098 |
Windham , et al. |
October 22, 2002 |
Dogwood tree named `Kay's Appalachian Mist`
Abstract
A new and distinct cultivar of Dogwood tree, Cornus florida,
named `Kay's Appalachian Mist`, is provided. This cultivar is
characterized by resistance to powdery mildew which is superior to
any other white flowering dogwood.
Inventors: |
Windham; Mark T. (Knoxville,
TN), Trigiano; Robert N. (Knoxville, TN), Witte; Willard
T. (Knoxville, TN) |
Assignee: |
University of Tennessee Research
Corporation (Knoxville, TN)
|
Family
ID: |
22783545 |
Appl.
No.: |
09/655,512 |
Filed: |
September 5, 2000 |
Current U.S.
Class: |
PLT/220 |
Current CPC
Class: |
A01H
5/02 (20130101); C12Q 1/6895 (20130101); C12Q
2600/13 (20130101); C12Q 2600/16 (20130101) |
Current International
Class: |
A01H 005/00 () |
Field of
Search: |
;PLT/220 |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
Windham, M.T., et al.; "Reactions of Cornus Species to Powdery
Mildew," SNA Research Confrerence, vol. 42, pp. 227-229 (42.sup.nd
Annual Report, 1997). .
Triginao, R.N., et al.; "Three New Cultivars of Flowering Dogwood
Resistant to Powdery Mildew", HortScience, vol. 35(3), p. 490 (June
2000). .
Gary, L.B., "Appalachian Spring: New UT Cultivar is First to Resist
Deadly Dogwood Disease," UT Agriculture Magazine (Spring 1999).
.
Caetano-Anolles, G., et al., "DNA amplification fingerprinting and
marker screening for pseudo-testcross mapping of flowering dogwood
(Cornus florida L.)", Euphytica, 1999, 106:209-222 Pub.: Kluwer
Academic Publishers, Netherlands. .
Gary, L.B., "Appalachian Spring: New UT Cultivar is First to Resist
Deadline Dogwood Disease," UT Ag. Magazine, Spring 1999,
XP-002194700, Pub: Univ. of Tenn. Online. .
Hagan, A.K., et al., "Susceptibility of Cultivars of Several
Dogwood Taxa to Powdery Mildew and Spot Anthracnose", J. Environ.
Hort., 1998, 16(3):147-151, Pub: unknown. .
Hanson, S., "Dogwood: Current and Future Research", 2000,
XP-002194703 [online]. .
Hollins, S.J., et al., "Breeding Disease Resistant Flowering
Dogwood (Cornus florida)", SNA Research Conference, 1999,
44:359-361 [online]. .
Ragland, C., "Dogwood Tree", Dogwood, Microsoft.RTM. Encarta.RTM.
Online Encyclopedia 2000, XP-002194704, Pub: Microsoft Corporation.
.
Trigiano, R.N., et al., "Teaching Methods: Laboratory Exercises on
DNA Amplification Fingerprinting for Evaluating the Molecular
Diversity of Horticultural Species," Hor Technology, 1998,
8(3):413-23, XP-001064538, Pub: Unknown. .
Trigiano, R.N., et al., "Three New Cultivars of Flowering Dogwood
Resistant to Powdery Mildew," Hort. Science, 2000, 35(3):490, #549,
XP-001064539, Pub: Unknown. .
Unknown, "Powdery Mildew of Flowering Dogwood", 2000, XP-002194701
[online], Pub: The University of Tennessee Dogwood Research Group.
.
Windham, M.T., et al., "Are `Barton` and `Cloud 9` the Same
Cultivar of Cornus florida L. ?", J. Environ. Hort., 1998,
16(3):163-166, XP-001064563, Pub: unknown. .
Windham, M.T., et al., "Development of Flowering Dogwood Cultivars
Resistant to Powdery Mildew", Tenth Conference of Metropolitan Tree
Improvement Alliance (Sep.-Oct. 1998), XP-002194702 [online]. .
Windham, M.T., et al., "Naturally Occurring Resistance to Powdery
Mildew in Seedlings of Cornus florida", J. Environ. Hort., 1998,
16(3):173-175, XP-001064535, Pub: unknown. .
Windham, M.T., et al., "New Dogwood Cultivars Resistant to Powdery
Mildew", SNA Research Conference, 2000, 45:204-205, XP-002194698
[online]..
|
Primary Examiner: Campell; Bruce R.
Assistant Examiner: Hwu; June
Attorney, Agent or Firm: Saliwanchik, Lloyd &
Saliwanchik
Claims
What is claimed is:
1. A new and distinct cultivar of Dogwood tree, Cornus florida,
named `Kay's Appalachian Mist`, as illustrated and described.
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 `Kay's Appalachian Mist`.
This new dogwood cultivar was discovered in a field planting of
approximately 980,000 Cornus florida seeds in Decherd, Tenn. in
1995. `Kay's Appalachian Mist` 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 `Kay's Appalachian Mist` 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 `Kay's
Appalachian Mist`. 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 photograph may differ from the actual colors
due to light reflectance.
DETAILED DESCRIPTION OF THE NEW VARIETY
The parental lineage of this cultivar is unknown. `Kay's
Appalachian Mist` is a white flowering dogwood cultivar isolated
from a field planting of approximately 980,000 Cornus florida seeds
in Decherd, Tenn. Seeds were bulked from collections of wild and
landcape trees from Tennessee, North Carolina, Alabama, and
Georgia. This cultivar may be reproduced asexually by rooting
cuttings and by grafting.
`Kay's Appalachian Mist` has creamy white bracts which slightly
overlap. Average bract size is about 13.7 cm long by about 12.0 cm
wide (n=14). Clefts at the ends of the bracts are flat and deeply
pigmented. Flower petals are yellow and flowers average 22 per
inflorescence (n=14).
`Kay's Appalachian Mist` 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 three
(3) years. Test plants were exposed to powdery mildew and assessed
for resistance to powdery mildew. Mildew scores for `Kay's
Appalachian Mist`, control plants, and `Cherokee Brave` were
obtained using the following scale: 0=healthy; 1=.ltoreq.2% of
foliage with signs or symptoms of powdery mildew; 2=.ltoreq.10% of
foliage with signs or symptoms of powdery mildew; 3=.ltoreq.25% of
foliage with signs or symptoms of powdery mildew; 4=.ltoreq.50% of
foliage with signs or symptoms of powdery mildew; 5=.ltoreq.75% of
foliage with signs or symptoms of powdery mildew; 6=.ltoreq.100% of
foliage with signs or symptoms of powdery mildew. Table 1 presents
the data obtained over the last three (3) years.
Year `Kay's Appalachian Mist` Control Score.sup.1 `Cherokee
Brave`.sup.2 1996 0.0 5.0(a) -- 1997 0.0 4.6(b) 2.3 1998 0.0 4.8(b)
2.1 .sup.1 Control plants were (a) Cornus florida seedlings or (b)
`Cherokee Sunset` that were of similar age and size. .sup.2
`Cherokee Brave` is a pink flowering dogwood cultivar which is the
only cultivar known to the inventors to possess 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-Anolles (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) CCTGTGAG, 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
this cultivar grown in Knoxville, Tenn. under container nursery
conditions which approximate commercial production conditions.
Dogwoods used for this description were about five (5) 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 `Kay's Appalachian Mist`. Parentage: Unknown. Propagation:
Type.--Terminal softwood cuttings. Time to initiate roots (in
June).--About 3-4 weeks at about 25-30.degree. C. Rooting
habit.--Profuse from base of cutting. Rooting
hormone.--5,000-10,000 ppm; five (5) second quick dip of 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 cloth over propagation bench.
Media.--Peat-perlite. Plant description: Plant form and growth
habit.--Perennial deciduous tree, mostly upright with horizontal
branching. Plant size.--A five (5) year old tree will attain a
height of about 250 cm and a width of about 110 cm. Vigor.--Similar
to other Cornus florida cultivars. Branching habit.--Moderate,
branch crotch angles of about 45-50.degree. to main trunk, less on
upper branches. Main stem/trunk description.--Diameter: About 3.8
cm; bark texture: smooth; bark color: gray 202C. Lateral branch
description.--Branch angle of about 50.degree. with a range of
48.degree.-55.degree.. Foliage description: Arrangement.--Simple,
opposite; leaves mostly crowded towards branch apices. Leaf blade
length (cm).--About 10<11.7<13.7 (n=5). Leaf blade width
(cm).--About 5.5<6.1<7 (n=5). Petiole length (cm).--About
0.5<0.7<0.8 (n=5). Petiole diameter (mm).--About
0.7<0.9<1.1 (n=5). Shape.--Ovate. Apex.--Acuminate, leaf tip
twisted 90.degree.. Base.--Cuneate, 50.degree.-60.degree. are
unequal. Margin.--Slightly undulate. Texture.--Upper surface:
Nearly glabrous. Lower surface: leaf hairs on vein or vein axils
(.mu.) 17<26<34. Color.--Yellow green 146A. Leaf vein
pairs.--5 to 6.5 alternate to mostly opposite. Petiole
reflexed.--80-90.degree. from plane of leaf blade. Bipolar
trichomes.--Upper surface (.mu.) -- 6<7.8<12. Lower surface
(.mu.) -- 9<11.1<14. Flower description: Fragrance.--None
observed. Flower bud size.--Width: 7 mm (widest diameter). Length:
5 mm (base to tip). Shape of involucral bracts.--Obovate/pandurate.
Apex shape of involucral bracts.--Retuse. Base shape of involucral
bracts.--Cuneate. Number of bracts.--4 (in two pairs). Natural
flowering season.--1999: about 16 days (April 10 through April 26).
2000: about 17 days (April 4 through April 21). 2001: about 15 days
(April 12 through April 27). Inflorescence arrangement.--Typical of
species, creamy white bracts slightly overlap. Inflorescence
diameter.--About 27-28 cm wide. Bract dimensions.--Upper bracts
about 13.7 cm long by 12 cm wide. Inflorescence is 6.4 mm wide;
anther length is 1.4 mm. Floral development is asynchronous among
inflorescence. Color (abaxial and adaxial surfaces).--Creamy white
(155B) clefts. Sepals.--Typically 4 deeply pigmented (red purple
60A). Stamens.--Typically 4. Pistil.--Typically 1. Petal color
(abaxial and adaxial surfaces).--Yellow green 151B. Flower
number.--26. Ovary.--Bilocular with each locule having 1 ovule.
Fruit description: Berry type.--Drupe (about 14 mm by 7 mm)
aggregated in one mass. Color.--10R(6/10) using Munsell Color Chart
for Plant Tissues (Munsell Color, Baltimore, Md. 21218). 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.
* * * * *