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United States Department of Agriculture

Agricultural Research Service

Simon: Release: Apopka
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                   FLORIDA AGRICULTURAL EXPERIMENT STATION
                            UNIVERSITY OF FLORIDA
                          GAINESVILLE, FLORIDA 32611

                                     and

                   UNITED STATES DEPARTMENT OF AGRICULTURE
                        AGRICULTURAL RESEARCH SERVICE
                           WASHINGTON, D. C. 20250

               RELEASE OF OPEN-POLLINATED MARKET CARROT, APOPKA

The Florida Agricultural Experiment Station and the USDA Agricultural Research
Service announce the release of Apopka, an open-pollinated fresh market culti-
var adapted for production in both organic and mineral soils where the market
cultivars Imperator 58 and Waltham Hicolor are grown.  Also, a high quality
hybrid, B6274 BC1 X Apopka, will be released commercially as soon as pilot pro-
duction and commercial trials can be completed.  This cultivar is released now
to permit seedsmen to build up a supply of stock seed and to begin testing
Apopka for its potential for limited use as an open cultivar and more import-
antly for its potential as a pollen parent in hybrids.

Apopka was derived by mass selection from Hicolor 9. In 1978 the first mass
selection was made among thousands of roots for about 20 roots that had
improved internal color and a semi-Nantes shape.  These roots were intercrossed
in isolation.  A second mass selection was made in 1979 for internal color and
root shape.  In 1980 and 1981 the 3rd and 4th mass selections included selec-
tion for improved flavor as well as color and shape.  In 1982 and 1983 soluble
solids were measured in elite roots to indirectly select for higher sugar in
addition to the other selection criteria.  The 1984 season's crop was lost to
the hard freeze of Christmas 1983.  The final (7th) mass selection was made in
1985 and the uniformity was judged suitable for release.

Roots of Apopka are 8-10 inches long, and have a semi-Nantes shape.  The exter-
ior is smooth with bright orange color extending from the shoulder to the tap
root.  Internal color is uniform with little contrast between xylem and phloem
and a relatively indistinct cambium zone.

Apopka was developed to replace an open-pollinated cultivar, Hicolor 9 with one
more uniform for color, flavor, smoothness, and a semi-Nantes shape.  Apopka
will supply breeding programs with improved type of Hicolor 9 from which
breeders may extract inbred lines adapted to Central Florida.  Apopka was
evaluated for commercial acceptability for three years, 1983-1985 at the Uni-
versity of California Imperial Valley Field Station (IVFS) and two years at
Zellwood, Florida (Table 1).
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Table 1.  Appearance ratings for Apopka in observation trials 1983-1985.
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                                    1983              19841/           1985
Entry                             IVFS    FL           IVFS         IVFS    FL
___________________________________________________________________________________

1.  Apopka                       1.8     3.5          2.8          3.0     2.5
2.  Hicolor 9                    2.0     2.8                       2.8     3.1
3.  IMP 58                       2.6     2.5          1.9          2.6     2.7
4.  Candy Pack                   2.6     2.5          2.3          2.9     3.0
5.  Orlando Gold                 3.0     3.3          2.8          3.0     3.3
6.  Golden State                 3.2     3.4          2.3          3.2     3.4
7.  A Plus                       2.6     2.9          1.9          2.6     3.1
8.  Olympiad                     3.0     1.4          3.7          3.0     1.4
9.  (4 67x3640c)xApopka                               3.4          3.7     3.5
10.  (6 39x6274 2)xapopka                              3.1          2.6     3.0
    5 Commercial Hybrids2/
         Range                 2.7-3.0  1.7-3.3     2.3-2.8      2.2-3.0 2.3-2.8
         Mean                    2.9     2.4          2.6          2.6     2.5
         Number of Judges        24      27           49           52      40
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1/ 1984 Florida trial lost to winter freeze
2/ The 5 commercial entries scored above were:  Dagger    78, Dominator,
  Polaris, Chancellor and Diplomat.

Average scores in Table 1 are based on values of 1 = unacceptable, 2 = poor, 3 =
fair, 4 = good and 5 = excellent.

These values demonstrate that Apopka might be competitive with available open-
pollinated cultivars, Hicolor 9 and Imperator 58; with the USDA hybrids, Candy Pack,
Orlando Gold, Golden State, A Plus and Olympiad and with five standard commercial
entries.  Apopka is more uniform for both exterior and interior color than Hicolor 9
and Imperator 58.  The high grades received for two hybrids (9 and 10) in Table 1
are evidence that Apopka may serve in hybrid production and as a useful source for
extracting improved inbreds.  A limited supply of breeders seed from screen
isolations will be distributed to hybrid carrot seed producers who make written
requests to Dr. Mark J. Bassett, Vegetable Crops Dept., University of Florida
Gainesville, FL by September 15, 1985.




______________________________________________________     Date______________________
Director Florida Agricultural Experiment Station



______________________________________________________     Date______________________
      Administrator, Agricultural Research Service


Last Modified: 8/10/2004