Details for: PI 672594, Rubus hybr., 'Douglass'

Summary Data

Taxonomy:

Rubus hybr.

Cultivar:

'Douglass'

Origin:

Developed – Oregon, United States

Maintained:

National Clonal Germplasm Repository

Received by NPGS:

22 Aug 1991

Improvement Status:

Cultivar

Form Received:

Plant

Life Form:

Perennial

Life Cycle:

Perennial

Availability

This accession is not available. Contact site for status.

National Clonal Germplasm Repository

Request are accepted July 1st - Sept. 30th; Ships in Nov.

Images (2 total. Click on image for more.)

Core Passport Data

Taxonomy:

Rubus hybr.

Cultivar:

'Douglass'

Origin:

Developed – Oregon, United States

Maintained:

National Clonal Germplasm Repository

Received by NPGS:

22 Aug 1991

Improvement Status:

Cultivar

Form Received:

Plant

Life Form:

Perennial

Life Cycle:

Perennial

Source History

Developed

19 October 1993.
Oregon, United States

Developer(s):

Douglass, Barney

Donated

22 August 1991.
Oregon, United States
Comment: Received from Douglass to Lawrence to NCGR-Corvallis
Donor(s):

Lawrence, Francis J., National Clonal Germplasm Repository

May 2002.
Oregon, United States

Donor(s):

Finn, Chad, USDA, ARS

Accession Group(s)

Group name: Rubus: blackberries
Note: bramble cultivars fruit with solid center
To search for accessions in this group, click the following link. Rubus: blackberries

Group name: Rubus: thornless
Note:
To search for accessions in this group, click the following link. Rubus: thornless

Accession Names and Identifiers

'Douglass'

Type: Cultivar name

Group: BLACKBERRY

named for Bernard Douglass, discoverer

CRUB 1416

Type: Site identifier

Group: LOCAL

Corvallis local number

Narrative

The new and distinct variety of thornless blackberry described herein originated from a hand-pollinated cross of two non-patented parents, Sander and Lawrence, which were also created by the applicant at his resident blackberry breeding facilities near Hillsboro, Oregon.The seeds resulting from this controlled hybridization were germinated in the applicant's greenhouse in the spring of 1985 and planted in an outdoor experimental flat in the early summer of 1985. The seedlings first lightly bore fruit during the summer of 1986. The subject cultivar was selected for its thornless cane, vigorous, traling vines, high berry productivity, and large, firm black fruit of high quality. During 1987, the above described cultivar was propagated asexually both by cane layering and cane cuttings for the purpose of further testing and evaluations by research horticulturists at Oregon State University's Department of Horticulture. The researchers found the cultivar to have outstanding potential.In 1989 Oregon State University's North Willamette Agricultural Experiment Station at Aurora, Oreg., included samples of the cultivar in their blackberry test plots. Test at other locations show that the cultivar may adapt to other areas of the Pacific Northwest outside of Northwestern Oregon.During all asexual multiplication, the characteristics of the original plant have been maintained and no aberrant phenotypes have appeared.Plants of the cultivar are highly vigorous and develop large diameter canes. Although nominally thornless, the 3 lower 12 -to 18-inch bases of the canes do contain small, soft incipient type spines similar to those found on raspberry canes. These small spines tend to disappear completely from the canes at a point about 12 to 18 inches above the ground level. The plants are genetically thornless, having genes for thornlessness derived from its distant "Austin Thornless" ancestor. Plants are moderately resistant to blackberry leaf and cane spot (Septoria rubi) which is a major cause of blighted foliage on a number of other Northwest adapted blackberry cultivarsFruit of the new cultivar ripens in mid-July about the same time as "Marion," a leading Northwest standard cultivar. The harvest period is about 20 days duration. The plants have never suffered from spring frosts and the canes have survived winter temperatures of 5* F. The fruit varies in shape from bluntly cone shaped to bluntly pointed cylindrical. The length of the fruit usually exceeds its diameter by about 40%. Fruit clusters are medium large and borne on long stout stems which facilitate easy picking. Flower fertility is high and -fruit drupelets tend to fill out the berries completely.

named for Bernard Douglass, discoverer

NAMED FOR= Barney Douglass, breeder

Rubus hybr.

Genus:

Rubus

Family:

Rosaceae

Subfamily:

Rosoideae

Tribe:

Rubeae

Nomen number:

104971

Comment:

interim designation used in GRIN for Rubus hybrids which lack an acceptable binomial

Verified:

04/11/1988 by ARS Systematic Botanists.

Other conspecific taxa

Autonyms (not in current use), synonyms and invalid designations

Heterotypic Synonym(s)
Rubus ×proteus C. H. Stirt. ex L. Hend., nom. inval.

Common names

Language	Name	seq	Citation
English	Marionberry	1	Facciola, S. 1998. Cornucopia II: a source book of edible plants Note: Kampong Publications
English	Olallieberry	1	Facciola, S. 1998. Cornucopia II: a source book of edible plants Note: Kampong Publications
English	youngberry	1	Facciola, S. 1998. Cornucopia II: a source book of edible plants Note: Kampong Publications

Annotations

Observations

Phenotype Data

Category	Descriptor	Description	Value	Study	Inventory	Availability
CYTOLOGIC	CHROMOCOUNT	CHROMOCOUNT	56	RUBUS.Thompson.ChromosomeCount.1995	CRUB 1416 .001 PL	Not Available
CYTOLOGIC	Ploidy Equation	Equation of the ploidy of the plant. Example 2n = 2x = YY	2n = 8x = 56	RUBUS.Thompson.ChromosomeCount.1995	CRUB 1416 .001 PL	Not Available
PRODUCTION	PROPAGATION	Propagation by tip layering or rooted cuttings	tip	RUBUS.PROPAGATION.2017	CRUB 1416 .001 PL	Not Available