Group Title: Sweet corn variety trial.
Title: Sweet corn variety trial. Spring 1989.
ALL VOLUMES CITATION THUMBNAILS PAGE IMAGE ZOOMABLE
Full Citation
STANDARD VIEW MARC VIEW
Permanent Link: http://ufdc.ufl.edu/UF00075806/00002
 Material Information
Title: Sweet corn variety trial. Spring 1989.
Series Title: Sweet corn variety trial.
Translated Title: Research Report - University of Florida Central Florida Research and Education Center ; 90-04 ( English )
Physical Description: Serial
Language: English
Creator: Hancik, Ivalou D.
White, J. M.
Publisher: Central Florida Research and Education Center, University of Florida
Publication Date: 1989
 Record Information
Bibliographic ID: UF00075806
Volume ID: VID00002
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 144607375

Full Text



University of Florida
Central Florida Research & Education Center
Sanford, Florida

Research Report SAN 90-04 November 1989

SWEET CORN VARIETY TRIAL, SPRING 1989

Ivalou D. Hancik and J. M. White


A supersweet (shrunken-2 and sugary enhanced) sweet corn variety trial was
conducted at A. Duda & Sons, Lake Jem, FL, during the spring of 1989. Sweet corn
lines of the gene type homozygous shrunken-2 (sh2) are considered the standard
for large commercial growers and constituted the major portion, i.e. 65 of 80
lines evaluated, of this trial. Thirteen lines of sugary enhanced (se) gene type
were also studied.

The kernels of sh2 type sweet corn have at least 2-3 times the total sugars
of normal sweet corn at optimum harvest; conversion of sugar to starch is also
much slower, facilitating extended storage and long distance shipping. Sugary
enhanced (se) sweet corn contains about 15% higher sugars at peak harvest than
normal sweet corn with a more tender pericarp than sh2 types; this type is
especially well-suited for roadside and fresh-market sales.

In light of the widespread use of supersweet corn by growers and a shift
in consumer preference toward supersweet types, it is important to evaluate
commercially available and advanced breeding lines for their adaptability to
central Florida growing conditions.

Materials and Methods

This trial was planted on March 21, 1989, in a Lauderhill muck. Seeds of
80 lines of sweet corn were planted by hand in single-row (3' wide x 12' long)
plots with an in-row spacing of 9 inches. Three replications of 80 lines were
arranged in a completely randomized block design.

Since the se lines were interplanted with the sh2 lines, the se lines had
to be de-tasseled (May 10) to provide isolation for the sh2 lines.

Cultural practices, provided by the cooperating grower, are comparable to
the routine practices used by commercial growers to produce a sweet corn crop
in central Florida.

Plots were harvested by hand at peak maturity, beginning May 26, 1989,
and ending June 6, 1989. Only first ears were harvested and individual plots
were harvested one time only. Ears were counted and weighed; subsamples of ten
marketable ears per plot were selected, husked,, and evaluated for length, width,
maturity, tip fill, husk cover, and kernel color (Table 1). Weather data are
recorded in Table 2.

Central Science
SLibrary

JAN 11 1990

University of Florida
... *,- d ^ Vm .-^ ....,M .I lL..... !. :.. '* '





i, f : ` > 1 i: i



S Results and Discussion

Sweet corn yields, expressed as 42 lb crates/acre. ranged from 199-625
crates/acre. High-yielding cultivars included XPH3009, Showcase, XPH2688, Sunre
2613, and Billy #1; all of these varieties were of the sh2 type. The lowest
yields were obtained with 87BC, an se type, and may be attributed to a poor
stand, i.e., 36% stand. Other varieties which were difficult to establish
include: Kandy Kiss (43%), 8801W (46%), and sweet Constance (49%).

Ear length ranged from 17.40 cm (GSS 3668) to 24.33 cm (Harlequin). Ear
diameter ranged from 4.03 cm (8202) to 5.17 cm (Showcase).

Plant heights were measured from the soil surface to the base of the
tassel. Since the se lines had been de-tasseled, it was only possible to
accurately record the height of the sh2 lines. GSS3668 was the shortest entry
(95'cm) while Even Sweeter was the tallest.

Placement of the first ear on the stalk is important in evaluating a
cultivar's potential adaptability to mechanical harvesting. Several lines had
first ears placed less than 30 cm from the ground: GSS3668 (20 cm), Silverado
(23 cm), HMX7344E (26 cm), HMX7345E (29 CM), GSS3170 (29 cm), and 77BC (29).

Among the five top-yielding cultivars (XPH3009, Showcase, XPH2688, Sunre
2613, and Billy #1), the top three matured at 76 days while Sunre 2613 and Billy
#1 were slightly earlier, maturing at 72 days after planting. XPH2688 was the
only bicolor type in the top five, however, tip fill was somewhat weak in this
line. Showcase also had a poorer stand (74%) than the other lines.

This report is not intended to recommend one variety over another, but
rather is meant as a general guideline for variety selection. Different field
locations, planting dates, and cultural practices may alter the performance of
these sweet corn lines; growers should be mindful of this variability when
selecting a new variety and small test areas of new varieties may be advisable.

Seeds were obtained from the following:

AC Abbott & Cobb, P. 0. Box 307, Feasterville, PA 19047
AG Agway Seeds, Box 4933, Syracuse, NY 13221
AM Amsa Seed Co., P. 0. Box 5301, Modesto, CA 95352
AS Asgrow Seed Co., 1811 East Florida, Nampa, ID 83651
EV Everglades REC, IFAS, P.O. Drawer A, Belle Glade, FL 33430
(E. A. Wolf)
FM Ferry-Morse Seeds, 3015 E. Cornstock, Nampa, ID 83651
HM Harris-Moran Seeds, Moreton Farm, Rochester, NY 14624
PS Park Seed, Cokesbury Rd., Greenwood, SC 29647
RB Rogers Brothers, P. 0. Box 80, Idaho Falls, ID 83402
SU Sun Seeds, P. 0. Box 1438, Hollister, CA 95024









Explanation of table headings:

- Plant & ear height: based on a representative plant from each plot in the A
& C replications.
- Ear length & width: measurements taken on husked ears, 10 ears/sample.
- Tip fill: 0 1" unfilled at tip; 5 full at tip
- Husk cover: 1-ear protrudes from husk; 5- ear is tightly wrapped
and completely covered.
- Notes/comments: sides side ears that form at the base of the main ear;
yellow, white, bicolor kernel color; glossy kernels
appear shiny at harvest.




U


Table 1. Sweet corn variety



S Cultivar Source-- Stand


trial Zellwood, FL 1989

Crates/ Plant Height
Days to acre height- to first
harvest (42#) (cm) ear (cm)


Market Avg. ear
able length
(%) (cm)


Avg. ear
diam (cm)


Tip Husk
fill cover


Notes/
comments


HMX7345E
(se)
Sunre 2644
(sh2)
Butterfruit
(sh2)
XPH2686
(sh2)
Zenith
(sh2)

7210Y
(sh2)
FMX280
(sh2)
7802BC
(sh2)
8000Y
(sh2)
7200Y
(sh2)


FMX 263
(sh2)
HMX7344E
(--)
Sunset
(sh2)
Sweet Treat
.(sh2)
70Y
(se),


HM-


SU.

PS

AS

HM


AC

FM

AC

AC

AC



FM

HM

FM

FM

AC


546

523

498

488

461


454

446

443

438

436



432

425

411

394

390


147

114

142

155


134

154

152

178

136



122


100.0

94.5

91.7

90.3

95.8


75.0

77.8

88.9

95.8

81.9



79.2

97.2

66.7

81.9

70.9


136

137


18.70

20.63

21.90

21.03

19.53


20.87

21.63

19.93

19.57

21.40



21.67

17.63

20.80

22.50

20.57


4.70

4.57

4.60

4.67

4.40


4.93

4.83

4.50

4.23

4.77



4.57

4.43

4.63

4.60

4.30


yellow/
4.83 5.00 sides
yellow/


4.50

3.00

4.00

4.67


4.67

4.50

3.33

4.17


5.00

3.83

5.00

5.00


5.00

5.00

4.67

4.67


sides
yellow Ig.
kernels

yellow
yellow
looks good

yellow
nice/flags

yellow

bicolor
yellow
sides


yellow
4.67 5.00 looks good


3.50

4.50

3.67

3.67

2.33


5.00

5.00

5.00

4.67

5.00


yellow


yellow/
many sides
yellow
1g.kernels

yellow


----------






Table 1. Cont'd.


Crates/ Plant Height Market Avg. ear
% Days to acre height to first able length Avg. ear Tip Husk Notes/
Cultivar Source Stand harvest (42#) (cm) ear (cm) (%) (cm) diam (cm) fill cover comments


82Y
(se)
8701W
(sh2)
7812BC
(sh2)
HMX7348S
(sh2)
77BC
(se)

GSS3590
(sh2)
Silverado
(sh2)
FMX285
(sh2)
80W
(se)
8202BC
(sh2)


72Y
(se)
6700Y
(sh2)
64Y
(se)
Twice As Nice
(sh2)
GSS3668
(sh2)


AC

AC

AC

HM

AC


RB

HM

FM

AC

AC


388

380

377

375

368


361

360

348

342

336


314

307

259

239


RB 90 70


133

135

132


135

146

132


145


47

62

40

39

29


37

23

49

51

61


119


151


228 95 20


91.7

87.5

93.1

87.5

84.7


76.4

77.8

66.7

87.5

87.5


66.7

66.7

77.8

57.0

70.8


22.40

19.00

19.30

19.57

18.10


17.77

20.93

20.77

19.80

19.20


20.07

20.06

17.67

19.37

17.40


4.69

4.57

4.37

4.59

4.60


4.70

4.37

4.87

4.50

4.03


4.73

4.67

4.10

4.27

4.55


2.67

4.67

4.17

4.50

3.50


4.00

4.50

4.33

2.83

4.17


3.50

3.83

3.33

3.83


4.33

5.00

4.67

4.33

5.00


4.67

4.50

4.67

5.00

5.00


5.00

4.50

4.00

5.00


yellow

nice

bicolor


bicolor
Ig.kernels




nice





bicolor


yellow

Ig.kernels



bicolor


2.67 3.67


- *







Table 1.


Crates/ Plant Height Market Avg. ear
% Days to acre height to first able length Avg. ear Tip Husk Notes/
Cultivar Source Stand harvest (42#) (cm) ear (cm) (%) (cm) diam (cm) fill cover comments


87BC
(se)
Sunre 2613
(sh2)
Billy #1
(sh2)
Sunex 2577
(sh2)
XPH2644
(sh2)

GSS3170
(sh2)
XPH 2687
(sh2)
GSS3548
(sh2)
8502BC
(sh2)
66BC
(se)

81W
(se)
Sunre 2636
(se)
7620Y
(sh2)
Sweet Belle
(sh2)
FMX271
(sh2)


AC

SU

AM

SU

AS


RB

AS

RB

AC

AC


AC

.SU

AC

AS

FM


36

86

94

96

87


83

94

64

75

100


86

94

80

70

73


199

581

568

534

526


517

517

490

487

477


471

469

452

447

441


150

143

145

160


134

162

165

141


148

157

154


55

43

40

55

74


29

51

61

55

37


57

35

49

62

63


58.4

90.3

88.9

94.4

90.3


83.3

93.0

91.7

98.6

100.0


95.8

95.8

87.5

80.6

77.8


18.70

20.73

21.20

20.33

20.57


21.47

21.40

20.40

21.10

18.73


19.20

18.57

19.57

21.20

21.63


4.10

5.00

4.97

4.73

4.57


4.93

4.67

4.33

4.67

4.23


4.23

4.47

4.47

4.70

4.83


4.50

4.17

5.00

4.33

3.67


3.83

4.33

4.00

3.50

3.67


3.67

2.83

4.50

4.50

4.50


5.00

4.67

5.00

5.00

5.00


4.17

5.00

5.00

5.00

5.00


5.00

5.00

5.00

4.83

5.00


bicolor

yellow

yellow

yellow
bicolor/
sides


yellow

bicolor

yellow
bicolor
glossy

bicolor


bicolor

bicolor

yellow

yellow

yellow


Cont'd.











Crates/ Plant Height Market Avg. ear
% Days to acre height to first able length Avg. ear Tip Husk Notes/
Cultivar Source Stand harvest (42#) (cm) ear (cm) (%) (cm) diam (cm) fill cover comments


GSS3485
(sh2)
79BC
(se)
XPH2640
(sh2)
Silverette
(normal)
XP427
(sh2)

8601W
(sh2)
Harlequin
(sh2) -
Butterfruit.
Bicolor (sh2)
Kandy Kiss
(sh2)
8801 W
(sh2)

XPH3009
(sh2)
Showcase
(sh2)
XPH2688
(sh2)
Promenator
(sh2)
7710Y.
(sh2)


RB

AC- --

AS

HM


AC

FM --

PS

FM- .--.

AC


-AS

RB

AS

AM

AC


88

62

71

87

72


60

65

61

43

46


87

74

83

71

94


72

72

72

72

72


72

72

72

72

72


76

76

76

76

76


418

417

413

404

393


370

356

314

283

281


625

587

584

536

528


132


176

137

121


160

151

152

126

152


163

145

174

148

138


88.9

76.4

79.2

84.7

77.8


82.0

59.7

61.1

54.2

62.5


98.6

83.4

91.7

98.6

95.8


20.17

20.83

20.63

19.67

19.77


19.67

24.33

20.60

21.73

20.40


20.60

20.90

20.73

20.84

20.77


4.53

4.70

4.73

4.53

4.93


4.27

4.77

4.47

4.60

4.43


4.53

5.17

4.80

4.50

4.63


4.50 5.00 yellow


3.67

4.17

3.17

2.50


3.83

4.00

3.33

4.33

4.83


4.00

4.00

3.33

4.17

4.83


5.00

4.83

5.00

4.17


4.17

5.00

5.00

5.00

4.83


5.00

5.00

5.00

5.00

5.00


bicolor

bicolor

bicolor

bicolor

white/
bicolor
bicolor
crooked

bicolor

yellow
bicolor
glossy


yellow
yellow
flags

bicolor
yellow/
flags
yellow
looks good


Cont'd.


Table 1.






Table 1.


Cont'd.


Crates/ Plant Height Market Avg. ear
% Days to acre height to first able length Avg. ear Tip Husk Notes/
Cultivar Source Stand harvest (42#) (cm) ear (cm) (%) (cm) diam (cm) fill cover comments


XPH2659
(sh2)
Excel
(sh2)
Diabolo
(sh2)
Sunex 2630
(sh2)
8802BC
(sh2)

Sweet Tooth
(sh2)
AMX34038
(sh2)
Sunre 2645
(sh2)
AMX 34035
(sh2)
7810Y
(sh2)

79Y
(se)
AMX34037
(sh2)
FL Staysweet
(sh2)
Sweet Constance
(sh2)
7900Y
(sh2)


AS

RB

FM

SU

AC


FM

AM

SU

AM

AC


AC

AM

ER

AM

AC


520

517

516

514

506


495

493

489

488

472


471

471

459

442

438


168

146

126

171

162


153

131

145

169

158


157

155

150

134


60

53

32

62

51


61

61

52

69

66


46

64

58

55

43


97.2

89.6

95.8

94.4

98.6


83.3

93.1

93.1

94.5

75.0


87.5

81.9

87.5

79.2

88.9


22.17

20.47

20.37

19.60

19.70


21.93

20.30

19.40

21.27

20.17


21.13

21.23

19.30

18.53.

21.33 .


4.50

4.70

5.13

4.93

4.60


5.07

4.47

4.77

4.53

4.63


4.63

4.70

4.43

4.67

4,70


4.00 5.00 yellow


4.00

3.33

3.50

3.50


3.00

4.33

4.17

4.00

4.17


.. 1.67

4.17


5.00

4.83

3.83

5.00


4.50

5.00

5.00

5.00

5.00


5.00

5.00


yellow

bicolor
bicolor
green tip

bicolor

bicolor,
crooked
yellow,
flags/nice

yellow

yellow
yellow/
nice


yellow

yellow


4.50 5.00 yellow


4.67 5.00

4.00 5.00


yellow/
flags

yellow


*


a

















Table 1. Cont'd.


Crates/ Plant Height Market Avg. ear
% Days to acre height to first able length Avg. ear Tip Husk Notes/
Cultivar Source Stand harvest (42#) (cm) ear (cm) (%) (cm) diam (cm) fill cover comments


Sunex 2626
(sh2) SU 51 76 412 169 79 65.3 19.83 4.67 3.17 4.83 bicolor
Seneca Sentry
(sh2) PS 51 76 386 182 45 69.4 21.20 4.53 3.00 5.00 yellow
Even Sweeter
(sh2) AS 67 76 324 185 73 72.2 19.03 4.30 3.00 4.50 bicolor
Upmost
(sh2) HM 86 77 362 142 45 70.8 19.67 4.77 3.00 4.33 bicolor
Ultimate
(sh2) HM 52 77 320 146 46 56.9 18.37 4.67 4.83 4.67 yellow

LSD 0.05 117.91


























Table 2. Temperature & rainfall at CFREC-Sanford (30 miles east of Lake Jem)
during the spring 1989 sweet corn season (March 21, 1989 June 6, 1989).

Daily temperature (OF)
Date maximum minimum Rainfall (in.)


March 21-31

PApril 1-30

May 1-31

June 1-6


Total


0.20

1.24

0.86


2.30




University of Florida Home Page
© 2004 - 2010 University of Florida George A. Smathers Libraries.
All rights reserved.

Acceptable Use, Copyright, and Disclaimer Statement
Last updated October 10, 2010 - - mvs