Group Title: Sweet corn variety trial.
Title: Sweet corn variety trial. Spring 1992.
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 Material Information
Title: Sweet corn variety trial. Spring 1992.
Series Title: Sweet corn variety trial.
Translated Title: Research Report - University of Florida Institute of Food and Agricultural Sciences ; 93-01 ( 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: 1992
 Record Information
Bibliographic ID: UF00075806
Volume ID: VID00005
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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*-( -fco3
S UNIVERSITY OF FLORIDA
C : INSTITUTE OF FOOD AND AGRICULTURAL SCIENCES 19-3
< f CENTRAL FLORIDA RESEARCH & EDUCATION CENTER
SANFORD, FLORIDA 32771 ,

Research Report SAN 93-01 August 1992
SWEET CORN VARIETY TRIAL, SPRING 1992

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

A supersweet (shrunken-2 gene) sweet corn variety trial was conducted on
Lust Farm, Inc., Apopka, FL, during the spring 1992 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
this 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 13, 1992; plots were single-row, 3'
wide x 25' long with 9" in-row spacing. Three replicates 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 May 26, 1992, and
ending June 3, 1992. Only first ears were harvested and individual plots were
harvested only once. Ears were counted and weighed; subsamples of ten 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 lb crates/acre, ranged from 170-143
crates/acre. High-yielding cultivars included Snow White, Ssupersweet 7210,
Golden Gourmet, MMI-0168, Ssupersweet 7630, and Florida Staysweet. Of these top-
yielding entries, Snow White (a white-kernel type) was the only non-yellow line.

The lowest yielding cultivars in this trial were Sunex 2732, Ssupersweet
7702, Sunre 2728, Ssupersweet 8701, and Candy Store.
Considerable variation in ear size/shape was recorded. Ear length (cm)
ranged from 17.4 (MMI-130) to 21.4 (Sunre 2732); ear diameter (cm) ranged from







4.17 (Ssupersweet 8102) to 5.15 (Ssupersweet 7210). Although husk cover and tip
fill were generally acceptable, Snow White, GSS 3492, Pinnacle, MMI-130, Sunre
*2732, Ssupersweet 7702, and Sunre 2728 had poor tip fill.. HMX 8368S, XPH3030,
Even Sweeter, MMI-0098, and Sunre 2732 had unacceptable husk cover.

Among the ten top-yielding cultivars, one line (MMI-0168) matured at 76
days, two lines (Ssupersweet 7210, Billy #1) matured at 78 days, two lines
(Challenger, GSS 3492) matured at 79 days, two lines (Snow White, Golden Gourmet)
matured at 80 days', two lines (Ssupersweet 7630, Florida Staysweet) matured at
82 days and one line (XPH 3009) matured at 84 days.

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 Abbott & Cobb, Inc., P.O. Box 307, Feasterville, PA 19053-0307
AM Amsa Seed Co., P. 0. Box 5301, Modesto, CA 95352-5301
AS Asgrow Florida Co., P. 0. Drawer D, Plant City, FL 33566
FM Ferry-Morse Seed Co., 3832 Hanover Hill Dr., Valrico, FL 33594
GL Gardenland, 1400 W. First Street, Sanford, FL 32771
HM Harris Moran, Moreton Farms, Rochester, NY 14624
MM Market More, Inc., P. 0. Box 445, Palmetto, FL' 34220
RNK Rogers NK Seed Co., P. 0. Box 4188, Boise, ID 83711-4188
SU Sunseeds, Inc., 1200 Anderson Corner Road, Parma, ID 83660

Explanation of Table Headings:

Crates/acre yield expressed as 42-lb crates containing 4.5-5 dozen ears,
calculated by extrapolating from the average yield of three 75 ft2 plots to
yield/acre (43560 ft2).

Husk 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 Y = yellow; W = white; B = bicolor.

Ear length/diameter (cm) measurements taken on husked ears, an average value
of a 10 ear sample/replication.


c'








Sweet Corn Variety Trial Zellwood, FL 1992.


Days to Yield/A % Husk Tip Kernel Avg. ear (cm)
Cultivar Source harvest crates cwt stand cover fill color length diam Notes/comments


Snow White HM
Ssupersweet 7210 AC
Golden Gourmet HM
MMI-0168 MM
Ssupersweet 7630 AC

SFlorida Staysweet GL
XPH 3009 AS
Challenger AS
Billy #1 AM
GSS 3492 .RNK

MMI-0021 MM
HMX 8368S HM
Flagship MM
Standing Ovation AM
-BSS 4498 RNK

Paksweet FM
MMI-0197 MM
Ssupersweet 8102 AC
XPH 3030 AS
Promenator AM

Ssupersweet 7801 AC
Monument .AM
GSS 3710 .RNK
Sweet Will i am AM
Discovery MM
-- --------------------------
Pinnacle HM
Even Sweeter AS
:Zenith HM
-.XPH 3039 AS
Upmos HM


80 f-i 413 a


78 1-n
80 f-i
76 o-q
82 bc

82 cd
84 a
79 i-1
78 k-m
79 i-I

75 q
81 c-e
80 e-h
80 e-h
80 g-j

-81 d-g
76 pq
79 j-m
80 f-i
80 f-i

-- 79-
76 op
81 d-g
79 h-k
80 f-i
79 h-k

74 r-
83 ab
80 f-i
80 f-i
73 r


403 ab
400 a-c
395 a-c
391 a-d

390 a-d
383 a-e
378 a-f
375 a-f
374 a-f

366 a-f
362 a-f
348 a-g
348 a-g
347 a-g

335 a-g
330 a-g
330 a-g
326 a-h
326 a-h

314 a-h
313 a-h
312 a-h
301 a-i
297 a-i

292 a-j
288 b-k
283 b-k
282 b-k
280 c-k


173 a


72.0 a-f


4.7 a-c


169 ab 74.2 a-f 5.0
168 a-c 64.5 a-h 4.7
166 a-c 84.9 a 5.0
164 a-d 66.7 a-g 4.5

164 a-d 81.7 a-c 5.0
161 a-e 69.9 a-g 5.0
159 a-f 67.7 a-g 4.7
158 a-f 67.7 a-g 5.0
157 a-f ..51.6 f-h 4.3

154 a-f 66.7 a-g 4.3
152 a-f 71.0 a-f 3.8
146 a-g 75.3 a-f 5.0
146 a-g 64.5 a-h 4.8
146 a-q 72.0 a-f 4.2


141 a-g
139 a-g
139 a-g
137 a-h
137 a-h

132 a-h
131 a-h
131 a-h
126 a-i
125 a-i

123 a-j
121 b-k
119 b-k
118 b-k
118 S&


53.8 d-h
76.3 a-e
61.3 a-h
82.8 ab
84.9 a

77.4 a-d
61.3 a-h
75.3 a-f
67.7 a-g
66.7 a-g

78.5 a-c
61.3 a-h
66.7 a-g
73.1 a-f


79.6


a-c


a
a-c
a
a-d

a
a
a-c
a
a-e

a-e
d-f
a
ab
b-e


4.8 ab
5.0 a
4.8 ab
3.8 d-f
5.0 a

4.3 a-e
4.5 a-d
4.5 a-d
5.0 a
4.7 a-c

5.0 a
3.7 ef
4.8 ab
4.8 ab
4.0 c-f


4.7 a-c


w
Y
Y
Y *
Y

Y


4.2 b-d
4.5 a-c
4.7 a-c
5.0 a
5.0 a

5.0 a
5.0 a
4.5 a-c
5.0 a
4.2 b-d

4.7 a-c
4.7 a-c
5.0 a
5.0 a
5.0 a

4.8 ab
4.3 a-d
5.0 a
4.8 ab
5.0 a

4.3 a-d
4.8 ab
4.8 ab
5.0 a
5.0 a

3.7 d
4.5 a-c
4.8 ab
5.0 a


B


Y
B
Y


W



Y

Y
W
Y
B
Y


19.7 b-g 5.00 a-c
18.7 f-k .33 m-p


poor pollinatia


Tabl e 1.


Y
Y



Y
Y
Y


19.2 d-j 4.87 b-e poor tip fill
20.0 b-f 5.15 a large kernels
20.9 ab 4.67 e-j--
18.0 jk 4.73 d-i ---
20.1 a-e 4.61 f-j poor pollination

18.7 f-k 4.49 j-n---
20.4 a-d 4.34 m-p---
19.8 b-f 4.88 b-e side ears
19.9 b-f 4.93 b-d---
19.5 c-h 5.07 ab large ear

19.6 b-h 4.37 I-p poor pollination
19.3 c-i 4.64 f-j---
18.3 g-k 4.59 h-k side ears
20.4 a-d 4.64 f-j long shank
18.9 e-j 4.73 d-i ---

20.7 a-c 4.63 f-j long, poor pollination
17.5 k 4.28 n-p med flags
19.9 b-f 4.17 p --
18.8 e-k 4.75 d-h---
19.5 c-h 4.47 j-o long shank

18.3 h-k 4.63 f-j
19.7 b-g 4.53 h-m side ears
18.0 i-k 4.81 c-g short foot
19.4 c-h 4.64 f-j
19.8 b-f 4.69 e-j long shank

20.0 b-f 4.26 op long flags
19.1 d-j 4.58 h-k side ears
18.3 h-k 4.52 i-m---








Table 1. Cont'd.


Days to Yield/A % Husk Tip .Kernel Avq. ear (cm)
Cultivar Source harvest crates cwt stand cover fill color length diam Notes/comments

MMI-0098 MM 77 no 269 d-k 113 d-k 72.0 a-f 3.3 fg 5.0 a B 20.1 a-e 4.63 f-j side ears
WSS-4948 RNK 74 r 261 e-k 110 e-k 51.6 f-h 5.0 a 4.3 a-d B 18.7 f-k 4.39 k-o long flags
Ultimate HM 81 c-f 261 e-k 110 e-k 59.1 b-h 5.0 a 5.0 a Y 18.8 e-k .4.53 h-m long.shank
-MMI-130 MM 78 mn 259 f-k 109 f-k 63.4 a-h 4.7 a-c 4.0 cd Y 17.4 k 4.28 n-p---
Dazzle AS 81 d-g 257 f-k 108 f-k 58.1 c-h 4.8 ab 5.0 a B 19.5 c-h 4.59 g-k
------------------------------------------------------------------------------------------------------------------
Sunre 2732 SU 81 d-g 236 g-k 99 g-k 47.3 gh 2.8 g 4.2 b-d Y 21.4 a 4.83 c-f poor tip fill
Ssupersweet 7702 AC 78 mn 206 h-k 87 h-k 58.1 c-h 4.3 a-e 4.0 cd B 19.1 d-j 4.27 op small ear
Sunre 2728 SU 78 1-n 189 i-k 79 i-k 66.7 a-g 5.0 a 4.0 cd Y 20.6 a-c 4.30 n-p short flags
Ssupersweet 8701 AC 80 f-i 177 jk 74 jk 52.7 e-h 4.8 ab 5.0 a W 19.2 d-j 4.67 e-j
Candy Store HM 80 e-h 170 k 71 k 43.0 h 4.3 a-e 4.5 a-c B 20.0 b-f 4.72 d-i


- mean separation by Duncan's Multiple Range Test, 0.05


1 evel .





* -V


Table 2. Temperature and rainfall at CFREC-Sanford

(30 miles east of Zellwood) during the spring 1992

sweet corn season (March 13 June 3).

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

March 13 31 84- 38 1.14

April 1 30 88 44 3.54

May 1 31 93 45 3.46

June 1 3 91 66 0.11

Total 8.25




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