Blackberry plant named ‘Chesapeake’

Details Blackberry plant named ‘Chesapeake’ Blackberry plant named ‘Chesapeake’

2001-07-30

2003-06-17

Campell, Bruce R. (Department: 1661)

Plants

Fruit

Bramble

Plant Patent

active

PP013878

ABSTRACT:

GENUS AND SPECIES OF THE CLAIMED PLANT
Rubus hybrid.
VARIETY DENOMINATION
‘Chesapeake’.
FIELD OF THE INVENTION
This invention concerns a new and distinct cultivar of thorny blackberry plant with a botanical name of
Rubus argutus×R. cuneifolius L.
DESCRIPTION OF RELATED PRIOR ART
Several cultivars of thorny blackberry plants are known. ‘Chesapeake’ may be distinguished from its parent, ‘Shawnee’ (U.S. Plant Pat. No. 5,686) and other large fruited thorny blackberry cultivars such as ‘Kiowa’ (U.S. Plant Pat. No. 9,861) by the recurvature of its spines and flavor of its fruit. It may be distinguished from ‘Black Butte’ (unpatented) by the type of spines and its erectness, compared to the semi trailing habit of the large fruited ‘Black Butte’. Fruit size and flavor distinguishes ‘Chesapeake’ from all other thorny blackberry cultivars known to us, including ‘Choctaw’ (U.S. Plant Pat. No. 6,678), ‘Illini Hardy’ (U.S. Plant Pat. No. 8,333), ‘Raven’ (unpatented) and ‘Ranger’ (unpatented). The presence of thorns and the size of the fruit distinguish ‘Chesapeake’ from thornless cultivars such as ‘Arapaho’ (U.S. Plant Pat. No. 8,510), ‘Navaho’ (U.S. Plant Pat. No. 6,679), ‘Hull Thornless’ (unpatented), ‘Triple Crown’ (unpatented) and ‘Chester Thornless’ (unpatented).
ORIGIN OF THE NEW CULTIVAR
The new cultivar of blackberry originated from a controlled cross at the University of Maryland Greenhouses in College Park, Md. The cross “SKNA” was ‘Shawnee’ (U.S. Plant Pat. No 5,686)×
R. cunefolius
(a wild selection from the town of Crisfeld, Md). This year was designated “N” as part of the University of Maryland at College Park; Rutgers University of New Brunswick, N.J.; Virginia Polytechnic Institute and State University, Southern Piedmont Agricultural Research and Education Center at Blackstone; and the University of Wisconsin at River Falls cooperative breeding program. The clone was first selected in 1992 at the Wye Research and Education Center of the University of Maryland located at Centerville, Md. and was therefore designated “−1”. Thus, the complete breeding designation was “NSKNA-1”.
SUMMARY OF THE NEW CULTIVAR
This application relates to a new and distinct thorny, spring bearing blackberry cultivar, botanically known as
Rubus argutus×R. cuneifolius L.
The following characteristics are outstanding:
1. Production of fruit which is much larger than the standard cultivars in use and larger or of equal size to two new extra large cultivars, ‘Black Butte’ (unpatented) and ‘Kiowa’ (U.S. Plant Pat. No. 9,861).
2. When compared to all othern eastern blackberry cultivars known to us, ‘Chesapeake’ has production of fruit which have a flavor less acid when slightly immature, at the glossy black fruit stage, allowing a slight blueberry flavor to emerge.
The following characteristics are useful in distinguishing this cultivar and can be useful for cultivar identification.
1. Plants are sparingly suckering and very upright, growing to 12 feet or taller when mature. Canes are only moderately cold hardy, i.e. not recommended for areas where the minimum winter temperature is less than 0° F.
2. Canes, petioles, petiolules and leaf midribs have only a moderate amount of large recurved thorns.
3. The fruit is very large, typically 15-22 grams in the first picking and has an aroma of a blueberry in cooler temperatures. The flavor contains undetectable quantities of highly aromatic compounds typical of eastern U.S. erect thorny or semierect thornless blackberry cultivars.
4. The fruit is produced in the midseason from floricanes. Primocane produced fruit is unknown.

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