Volume 52 Number 3 Article 28 Pages: 124-127
Year 1998 Month 7
Title: ´Triple Crown` Thronless Blackberry
Authors: G.J. Galletta, J.L. Maas, J.R. Clark and C.E. Finn
Triple Crown' is a midsummer-ripening tetraploid thornless blackberry cultivar
[Rubus sp., subgenus Rubus (Eubatus)]
suitable for fresh or processed use
developed and released by the Agricultural Research Service, U.S. Department of
Triple Crown, tested as US
1638, was selected in 1983 at Beltsville,
Maryland by G.J. Galletta from his 1980
cross of SIUS 68-2-5 (=C-47) × Arkansas
545 ('Darrow' × 'Brazos'). SIUS
68-2-5 ('Black Satin' × SIUS 64-21-4) is a
thornless selection bred by the late Dr.
"Jack" Hull of the USDA. SIUS 64-21-4
is a full sibling of 'Hull Thornless' (1),
'Black Satin,' 'Dirksen Thornless,' and
'Chester Thornless' blackberries.
Crown' has grown and fruited well in several locations in Beltsville from 1985
through 1995, and also at Corvallis, Oregon, where 7-year-old plants yielded an
average of 14.7 kg per plant in 1995 (C.
Finn, unpublished data). Triple Crown'
was named for its three crowning attributes: high vigor in a thornless plant, high
productivity, and improved fruit sweet
ness and aroma.
Coupled with its improved fruit display habit, this was
enough to suggest that this selection
might compare with the winner of the
Triple Crown of horse racing.
Crown' was released to nurseries in 1996.
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