Group Title: Sweet corn variety trial.
Title: Sweet corn variety trial. Spring 1993
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 Material Information
Title: Sweet corn variety trial. Spring 1993
Series Title: Sweet corn variety trial.
Translated Title: Research Report - University of Florida Institute of Food and Agricultural Sciences ; 94-01 ( English )
Physical Description: Serial
Language: English
Creator: Hancik, I. D.
White, J. M.
Crnko, G. S.
Publisher: Central Florida Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida
Publication Date: 1993
 Record Information
Bibliographic ID: UF00075806
Volume ID: VID00006
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 144607375

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4 University of Florida
Institute of Food & Agricultural Sciences '' i3
Central Florida Research & Education Center
Sanford, FL 32771-9608 esity of :

Research Report SAN 94-01 July 1993


SWEET CORN VARIETY TRIAL, SPRING 1993

I. D. Hancik, J. M. White, & G. S. Crnko


A supersweet (shrunken-2 gene) sweet corn variety trial was conducted at Zellwin
Farms, Inc., Zellwood, FL, during the spring 1993 growing season. The trial was limited to
cultivars/breeding lines of the gene type homozygous shrunken-2 (sh2), i.e. supersweet, since
these cultivars are considered the standard for large commercial growers. Yellow, white,
and bicolored lines were included in the trial.

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. This
slower conversion facilitates a longer harvest and storage period along with an increased
time for consumption. Consumer preference has also shifted toward the supersweet types
of sweet corn. In light of the widespread use of the sh2 type sweet corn, it is important to
evaluate commercially-available and advanced breeding lines for their adaptability to central
Florida's growing conditions.

Materials & Methods

Seeds were planted by hand on March 30, 1993; plots were single-row, 3' wide x 25'
long with 9" in-row spacing; Three replications were arranged in a randomized complete
block design.

Cultural practices, provided by the cooperating grower, were 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 June 10, 1993, and ending
June 14, 1993. Only first ears and/or marketable second ears were harvested. Individual
plots were harvested only once. Ears were counted and weighed; subsamples of 10
marketable ears/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.








Results & Discussion

Sweet corn yields, expressed as 42 Ib crates/acre, ranged from 160-704 crates/acre.
The five top-yielding entries were UF-67M, Ssupersweet 7630, UF-67B, XPH 3024, and
FMX 329.

The lowest yielding lines in this trial were GSS 3732, UFY #7, UFW #4R, UFB-
43R, and WSS.4233.

Considerable variation in ear length was recorded; ear length (cm) ranged from 17.3
(UFW #4R) to 22.2 (XPH 3027). Ear diameter (cm) was less variable, ranging from 4.3
(Florida Staysweet and WSS 4233) to 5.4 (Sunset); differences in diameter were not great
enough to be considered statistically different.

Husk cover was marginal on BSS 4273, WSS 4948, and BSS 4498. However, each
of these entries was overmature at harvest, which may have contributed to the poor husk
cover rating. Tip fill was generally good in all entire; XPH 3024 was somewhat weak in
tip fill and also had some pollination problems.

Days to harvest was not a factor in this trial, since all entries matured within a four
day period (June 10-14).

9 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 advised.

Seeds were obtained from the following:


AC
.AM
AS
FM
GL
RNK
SU
UF/EREC


- Abbott & Cobb, Inc., P. O. Box 307, Feasterville, PA 19053-0307
- Amsa Seed Co., P. O. Box 5301, Modesto, CA 95352-5301
- Asgrow Florida Co., 4144 Highway 39 North, Plant City, FL 33565
- Ferry-Morse Seed Co., P. O. Box 4948, Modesto, CA 95352-4938
- Gardenland, 1400 W. First St., Sanford, FL 32771
- Rogers NK Seed Co., P. O. Box 4188, Boise, ID 83711-4188
- Sunseeds, Inc., 1200 Anderson Corner Rd., Parma, ID 83660
- Univ. of Florida, Everglades REC, P. O. Box 8003, Belle Glade, FL 33430-8003






Table 1. Sweet corn variety trial Zellwood, FL Spring 1993.


Days to Yield/acrey % Husk Tip" Kernelv Avg. earu (cm)
Entry Source harvest cratesz cwt stand cover fill color length diam. Maturitvt Notes/comments

UF-67M UF 76 704 a 296 a 134 b-d 4.3 ab 5.0 a B 20.2 e-j 4.7 a 0 glossy
Ssupersweet 7630 AC 76 570 b 239 b 105 d-i 5.0 a 3.7 de Y 21.2 b-d 4.5 a -1 long flags
UF-67B UF 76 542 bc 228 bc 122 c-f 5.0 a 5.0 a B 20.1 e-k 4.7 a 0 ---
XPH 3024 AS 76 508 b-d 213 b-d 120 c-g 5.0 a 3.2 e Y 20.8 c-e 4.5 a 0 some pp5
FMX 329 FM 72 506 b-e 213 b-e 145 bc 4.5.a 4.5 a-d Y 20.9 c-e 5.1 a +1- .fat ears
----------------------------------------------------------------------------------------------------------------------------------------------
UFW #6M UF 72 488 b-f 205 b-f 134 b-d 5.0 a 5.0 a W 20.1 e-k 4.8 a 0 very long flags
GSS 4606 RNK 76 487 b-f 205 b-f 120 c-g 4.8 a 5.0 a Y 19.5 i-k 4.5 a 0 long flats, glossy
Monument AM 76 479 b-g 201 b-g 131 cd 5.0 a 3.7 de Y 20.4 d-h 4.7 a 0 curved ear, long flags
Ssupersweet 8102 AC 72 479 b-g 201 b-g 120 c-g 5.0 a 5.0 a B 20.7 c-f 4.4 a 0 glossy, nice
Promenator AM 76 471 b-g 198 b-g 161 ab 5.0 a 4.7 a-c Y 20.2 e-j 4.7 a 0 long flags, glossy
---------------------------------------------------------------------------------------------------------------------------------------------
XPH 3036 AS 76 467 b-g 196 b-g 114 d-h 4.0 a-c 4.0 b-e B 20.2 e-j 5.1 a 0
Billy #1 AM 72 457 b-h 192 b-h 117 c-g 5.0 a 4.7 a-c Y 21.9 ab 5.0 a 0 glossy
Sunset FM 76 453 b-h 190 b-h 108 d-i 5.0 a 3.8 c-e Y 20.7 c-f 5.4 a +2 sides, Ig. poor ears
UFY #15R UF 72 447 b-h 188 b-h 120 c-g 4.8 a 5.0 a Y 19.5 i-k 4.6 a 0 thick husk
WSS 4948 RNK 72 443 b-h 186 b-h 173 a 3.2 cd 4.8 ab W 20.3 e-i 4.9 a +3 Ig. kernels, poor
------;----------------------------------------------------------------------------------------------------------------------------------------
XPH 3028 AS 72 432 c-h 182 c-h 104 d-i 5.0 a 4.8 ab B 21.4 bc 4.5 a +1 Ig. kernels, crooked
UFLC-43 UF 76 431 c-h 181 c-h 107 d-i 3.5 b-d 5.0 a B 19.8 g-k 4.9 a 0 glossy, longflags, nice
Ssupersweet 7612 AC 72 426 c-h 179 c-h 134 b-d 4.8 a 4.8 ab B 20.8 c-e 4.7 a 0 glossy, Ig. kernel, nice
XPH 3056 AS 76 410 c-i 172 c-i 115 c-h 5.0 a 3.7 de Y 20.1 e-k 4.6 a 0 glossy
Standing Ovation AM 76 402 d-i 169 d-i 91 g-j 5.0 a 5.0 a Y 20.5 c-h 4.7 a 0 long flags, nice
--------------------------------------------------------------------------------------------------------------------------------------------
Ssupersweet 7210 AC 72- 398 d-i 167 d-i 91 g-j 5.0 a 4.3 a-d Y 20.7 c-f 4.8 a 0 Ig. kernels, glossy
BSS 4273 RNK 72 394 d-i 165 d-i 119 c-g 2.7 d 4.8 ab B 21.2 b-d 4.8 a +2 Ig. kernels
BSS.4498 RNK 76 389 d-i 163 d-i 110 d-i 3.3 cd 5.0 a B 19.7 h-k 5.0 a +2 long flags
XPH 3027 AS 72 385 d-i 162 d-i 94 f-i 4.3 ab 4.0 b-e Y 22.2 a 4.8 a +3 dark yellow
Sunre 2733 SU 76 381 d-i 160 d-i 129 cd 4.7 a 3.7 de B 21.3 b-d 4.9 a 0 long flags






Table 1. Cont'd.


Days to Yield/acrey % Huskx Tip" Kernel' Avg. earu (cm)
Entry Source harvest cratesz cwt stand cover fill color length diam. Maturityt Notes/comments


Sweet William AM 76 380 d-i 160 d-i 82 ij 5.0 a 4.7 a-c Y 20.6 c-g 4.5 a .0 long flags, some pp
UF Y #35 UF 72 372 e-i 156 e-i 114 d-h 5.0 a 5.0 a Y 19.3 k 4.6 a -1 glossy
Sunre 2763 SU 72 369 f-i 155 f-i 127 c-e 4.3 ab 4.8 ab B 21.9 ab 4.9 a 0 glossy, Ig. kernels
XPH 3030 (Frontier) AS 72 364 f-i 153 f-i 130 cd. 4.8 a 4.8 ab W 19.9 f-k 4.5 a -1 long shank
FL Staysweet GL 76 359 f-i 151 f-i 90 g-j 5.0 a 3.7 de Y 19.3 k 4.3 a 0 pp, poor appearance

GSS 3710 RNK 72 347 g-i 146 g-i 112 d-i 4.7 a 5.0 a Y 19.3 jk 4.5 a 0 glossy, Ig. flags
GSS 3732 RNK 76 325 h-j 137 h-j 123 c-f 4.8 a 3.8 c-e Y 20.5 c-h 4.6 a 0 long flags, sm. kernels
UF Y #7 UF 72 284 i-k 119 i-k 98 e-i 5.0 a 5.0 a Y 19.5 i-k 4.4 a -1 long flags
UFW #4R UF 76 218 j-1 92 j-1 86 h-j 4.7 a 4.8 ab W 17.3 1 4.7 a 0 curved, poor appear.
UFB-43R UF 76 193 kl 81 kl 64 j 5.0 a 4.5 a-d B 19.8 g-k 4.8 a 0 sides, some pp
WSS 4233 RNK 76 1601 641 106 d-i 5.0 a 5.0 a W 17.7 1 4.3 a 0 long flats


'Mean separation in columns by Duncan's Multiple Range Test, 0.05 level. Means followed by the same letter are


not significantly different.


YYield expressed as 42 lb crates/acre.

XHusk cover 1 = ear protrudes from husk; 5 = ear is tightly wrapped & completely covered.

"Tip fill 0 = at least 1" of unfilled kernels at the ear tip; 5 = full at tip.

"Kernel color B = bicolor; W = white; Y = yellow.

UEar length/diam (cm): measurements on husked ears, an average value of a 10-ear sample/replication.
tMaturity 0 = harvested at optimal maturity, + I = indicates over mature (+) or undermature (-) & the number of days.


Spp poor pollination.













Table 2. Temperature and rainfall at CFREC-

Sanford (30 miles east of Zellwood) during the

spring 1993 sweet corn season (March 30 June 14).


Daily temp. ( F) Rainfall
Month max. min. (in.)


March 30-31 83 65 0.00.

April 1-30 82 60 1.72

May 1-31 92 71 3.88

June 1-14 95 66 0.36

Total 5.96




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