Plants – Rose – Climber
Plant Patent
2000-02-04
2002-01-29
Campell, Bruce R. (Department: 1661)
Plants
Rose
Climber
Plant Patent
active
PP012377
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention of ‘Gem Star’, a new and distinctive cultivar of strawberry plant , is a result of the cross breeding between ‘B2’ (an unpatented J&P selection) and ‘A3’ (an unpatented J&P selection). The resulting plant was selected in a controlled breeding plot at J&P Research's cultivated field located in Naples, Fla. during the fruiting season of 1997-1998. It was designated as ‘JP2’ by the inventor. This cultivar is botanically identified as
Fragaria xananassa Duch.
‘Gem Star’ has been propagated by runners and meristem culture in Naples, Fla. as well as in the commercial nurseries in United States and Canada. It has been trialed in the field of growers in North Carolina and Florida. ‘Gem Star’ plant retains its distinctive characteristics and reproduces true to type in successive generations.
COMPARISON TO CLOSEST CULTIVARS
The commercial cultivar which we believe to be closest to ‘Gem Star’ from those known to us is ‘Chandler’, (U.S. Plant Pat. No. 5,262). However, there are several characteristics of ‘Gem Star’ that are different or not possessed by ‘Chandler’. Those are:
(1). Anthracnose crown rot tolerance: The plant of ‘Gem Star’ is tolerant to anthracnose crown rot disease, which is one of the major diseases in strawberry production in the southeastern United States. ‘Chandler’ is susceptible to anthracnose disease.
(2). Fruit size: The fruit size of the primary fruit of ‘Gem Star’ is much larger than that of ‘Chandler’.
(3). Fruit color: The fruit color of ‘Gem Star’ is lighter than that of ‘Chandler’.
(4). Isozymes in leaf extracts: isozyme analyses see Table 1. (a) The phosphoglucoisomerase (PGI) isozyme banding pattern for ‘Gem Star’ is A4 whereas ‘Chandler’ is A1(b) The leucine aminopeptidase (LAP) isozyme banding pattern for ‘Gem Star’ and ‘Chandler’ is B3. (c) The malate dehydrogenase (MDH) isozyme banding for ‘Gem Star’ is C1 whereas ‘Chandler’ is C2.
All isozyme analyses were conducted using leaf tissue. Reference: J. Amer. Soc. Hort. Sci. 106:684-687, (1981); USDA Forest Service General Technical Report PSW-64,(1982); and Tanksley,S. D. and Orton, T. J. Isozymes in Plant Genetics and Breeding, Part A, pp. 469-516 (Elsevier Science Publishers B.V., 1984).
TABLE 1
Isozyme in leaf extracts by electrophoresis
‘Gem Star’
‘Chandler’
PGI
A4
A1
LAP
B3
B3
MDH
C1
C 2
As shown in Table 1 ‘Gem Star’ can be unambiguously distinguished from ‘Chandler’ by using the above-mentioned isozyme patterns.
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