Group Title: Sweet corn variety trial.
Title: Sweet corn variety trial. Spring 1991.
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 Material Information
Title: Sweet corn variety trial. Spring 1991.
Series Title: Sweet corn variety trial.
Translated Title: Research Report - University of Florida Institute of Food and Agricultural Sciences ; 92-01 ( English )
Physical Description: Serial
Language: English
Creator: Hancik, I. D.
White, J. M.
Publisher: Central Florida Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida
Publication Date: 1991
 Record Information
Bibliographic ID: UF00075806
Volume ID: VID00004
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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o r University of Florida
Institute of Food & Agricultural Sciences
Central Florida Research & Education Center j 1 '
Sanford, Florida 32771

Research Report SAN 92-01 A i ius 1I'

Sweet Corn Variety Trial, Spring 1991

I. D. Hancik and J. M. White


A supersweet (shrunken-2 gene) sweet corn variety trial was conducted on
Clonts Farm, Inc., Apopka, FL, during the spring of 1991. This 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.

Material & Methods

Seeds were planted.by hand on March 29, 1991; plots were single-row 3' wide
x 20' 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 May 30, 1991, and
ending June 10, 1991. Only first ears were harvested and 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 at 42 lb crates/acre, ranged from 83-332
crates/acre. High-yielding cultivars included Paksweet, Challenger, ES-XP-35,
XPH 3030, XPH 2687, and XPH 3039. Three of these entries (Paksweet, Challenger,
and ES-XP-35) were yellow varieties. XPH 2687 and XPIH 3039 were bicolor and XPH
3030 was the only white line in the top-yielding entries.

The lowest yielding cultivars in this trial were Sunex 2643 and Butterfruit
Bicolor; plant stand and marketable percent were very low (<40%) in both cases.









Considerable variation in ear size/shape was recorded. Variations may have
been due to rains and field flooding in late April. Ear length (cm) ranged from
16.50 (Ssupersweet 7801) to 21.87 (WSS 3680); ear diameter (cm) ranged from 3.83
(Apex) to 5.20 (GSS 3710). Although husk cover and tip fill were generally
acceptable, nine of 13 white lines had unacceptable husk cover and/or green-
tipped ears.

Among the 10 top-yielding cultivars, eight matured at 66 days (Paksweet,
Challenger, ES-XP-35, XPH 2687, XPH 3039, Ssupersweet 8102, SS-7210, and ES-XP-
15) while Showcase and XPH 3030 matured at 68 and 73 days, respectively.

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, Inc., P.O. Box F307, Feasterville, PA 19047
AG Agway, Inc., Crop Services, 1225 Zeager Rd., Elizabethtown, PA 17022
AM Amsa Seed Co., P. O. Box 5301, Modesto, CA 95352-5301
AS'- Asgrow Florida Co., Rt. 9, Box 380, Lake City, FL 32055
ERC Everglades Research & Education Center, IFAS, P.O. Box 8003, Belle Glade,
FL 33430-1101
FM Ferry-Morse Seed Co., 361 S.E. 53rd Ct., Ocala, FL 32671
HM Harris Moran, Moreton Farms, Rochester, NY 14624
MM Market More, Inc., 4305 32nd St., W., Bradenton, FL 34205
PK Park Seed Co., Wholesale Division, Highway 254, Greenwood, SC 29647-0001
RNK Rogers NK Seed Co., P. O. Box 4188, Boise, ID 83711-4188
SU Sunseeds, Inc., P. O. Box 1438, Hollister, CA 95024

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 60 ft2
plots/rows to yield/acre (43560 ft2).

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

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

Husk cover 1 = ear protrudes from husk; 5 = ear is tightly wrapped and
completely covered.


% I *





Table 1. Sweet Corn Variety Trial -'Zellwood, FL 1991, cont'd.


% Days to rates/
'. . l l. ,., \


ItA In L", rTiHu Kerne


1 ar-%rt l


d i amq


fill


color Notes/comments


Cultivar Source Stan
d harvest acre(42#) mous.xev ause a eng


Ssupersweet 8801
XP-589
Billy #1
_Ssupersweet 7620
HMX 8368S


AC
HM


95
80
100
85
95


236 d-o
234 d-o
233 d-p
232 d-p
S232 d-p


0.00
+0.50
0.00
0.00
0.00


81
79
79
74
79


19.90 c-m
19.03 f-u
18.07 q-aa
18.67 k-y
19.53 c-q


4.23 g-o
4.33 e-1
4.27 f-n
4.27 f-n
4.50 c-g


4.33 a-e
3.00 f-j
2.83 g-j
4.17 a-f
4.50 a-d


2.50 g-1
3.33 b-i
4.00 a-g
5.00 a
3.17 c-j


W green tip
B curved, green tip
Y curved ears
S --
Y curved ears


Ssupersweet 7210
GSS 3749
Ssupersweet 7710
Golden Gourmet
HMX 8386S


AC 100
RNK 93
AC 100 -
HM 100
HM 100l


232 d-p
230 d-q
227 e-q
226 e-q
224 e-q---


0.00
+0.33
-1.33
0.00
0.00


18.10 q-aa
18.47 m-z
18.97 g-v
20.60 a-e
17.10 z-bb


4.40 d-j
4.47 c-h
4.13 j-g
3.93 p-r
4.30 e-m


2.83 g-j 3.83 a-g
4.83 ab 4.83 ab
3.50 c-i 3.50 a-h
4.00 a-g 1.83 j-m
3.00 f-j 3.67 a-g


-- ---- ------ ---- ---- ---- ---- ----- ----Y-r ------------ry tip,-curve- ---y tip,-curve-ear-- --- ---- -


Y dry tip, curved ear
Y --
Y --
Y green tips, skinny ears
Y blunt & curved at tip


ES-XP-904
Flagship
Ssupersweet 7500
HMX 7357BS
AMY 34045


ERC
MM
AC
HM
AM


100
100
91
87


219
218
217
216
213


f-r
f-r
f-s
f-s


-0.33
0.00
-0.67
+0.33
0.00


20.50 a-f
18.23 p-z
18.63 l-y
17.60 u-bb
19.57 c-q


3.97 o-r
4.23 g-o
4.17 i-p
4.47 c-h
4.43 c-i


3.67 b-i
5.00 a
3.50 c-i
2.83 g-j
4.83 ab


- -------------- ------ -------------- -- ------- -- ----------5.00-a-Y--ong,-----------ears


5.00 a
4.67 a-c
5.00 a
3.50 a-h
3.17 c-j


tiny kernels
large kernels


Florida Staysweet
Discovery
XP-427
Twice-AS-Nice
HMX 9353 BS


Zenith
GSS 3492
Ultimate
Dazzle
-Sweet TOD


ERC
MM
AG
AG
HM


RNK
HM
AS
RNK


100
73
79


88-
100
100
92
100


210 h-t
209 i-t
207 i-t
207 i-t
206 i-t


203 i-t
201 i-u
192 j-v
191 k-v
190 k-v


-0.33
+0.33
+1.50
-0.33
-1.33


-1.00
-2.33
0.00
-0.33
-1.33


19.43 c-q
18.70 k-y
17.87 r-bb
18.33 n-z
19.27 d-r


19.03 f-u
18.43 m-z
18.33 n-z
20.03 c-1
19.43 c-q


4.07 l-r
4.37 e-k
4.50 c-g
4.30 e-m
4.07 l-r


4.00 n-r
4.03 m-r
4.27 f-n
4.33 e-1
4.10 k-r


3.67 b-i
4.33 a-e
1.83 j-k
3.50 c-i
3.00 f-j


---- --- --- ------ ---4.50-a---------- -- ---------------------- a-- -- -


4.50 a-d
4,50. a-d
4.17 a-f
3.17 e-i
4.17 a-f


.------a-g
- - - - - - - - - - -- -gree --ps-
e% n~


3.83 a-g
4.33 a-e
3.33 b-i
2.50 g-1
4.33 a-e


3.83 a-g
5.00 a
4.67 a-c
3.00 d-k
4.50 a-d


large kernels


Y curved
Y --
B --
S --


.... .----
- I. , - ~ ~ -__ _ _ _ _ 4 -- -


Upmost
Aloha
Butterfruit
SGSS 3590
ES-XP-903


HM
RNK
PK
RNK
ERC


97
84
76
-80
100


190 k-v
180 1-w
177 m-w
177 m-w
175 n-w


+1.33
0.00
+0.33
+1.67
0.00


17.37 x-bb
19.03 f-u
20.33 b-i
17.43 w-bb
20.43 b-g


4.30 e-m
4.20 h-p
4.37 e-k
4.50 c-g
4.10 k-r


2.67 h-j
4.50 a-d
3.17 e-i
1.00 k
4.17 a-f


3.00 d-k
3.83 a-g
3.50 a-h
4.17 a-f
5.00 a


Y curved, large kernels
B --
Y curved tip
Y curved, large kernels
Y long & skinny


L-


PlarKet;


iv2. ear m ll


longn, skinny ears


i


green tips


I


- - - - - -- - - - - - - - --" ~"~




Sweet Corn Variety Trial Zellwood, FL 1991


rni t- iTr


Source Stand


Days to Crates/
harvest acre(42#T


Market
Maturity able %


Avg. ear (cm)


length


diam


Paksweet
Challenger
ES-XP-35
XPH 3030
XPH 2687


XPH 3039
Ssupersweet 8102
Showcase
SS-7210
ES-XP-15-

Quasar
Ssupersweet 8502
Ssupersweet 7630
Ssupersweet 8701
Sunex 2577


*25HMLX 7355
MMI-35
ES.-BC-43
Sweet Belle
GSS 4312

Illini Gold
Promenator
WSS 3680
*ES-XP-7
BSS 4498-


AS
ERC
AS
AS

AS
AC
RNK
ERC
ERC


AC
AC
AC
SU


HM
MM
ERC
AS
RNK


100
100
100
100
100

100
100-
99
100
100

100
100
99
100
97

100
100
, 99
96
100


PK 100
AM 100
RNK 81
ERC 100


RNK


100


66
66
68
66
66


332 az
322 ab
306 a-c
298 a-d
290 a-e

290 a-e
285 a-f
281 a-g'
280 a-h
269 a-i-

266 b-i
265 b-i
263 b-j
262 b-j
256 b-k

255 b-k
249 c-1
248 c-1
248 c-1
247 c-m


246 c-m
246 c-m
245 c-m
244 c-n
241 c-n

240 c-n
239 c-o
238 c-o
237 c-o
237 c-o


RNK 95
ERC 100


GSS 3710
ES-W6
AMX 34040
GSS 3617
ES-W67


AM'
SRNK
ERC


99
100
99


+1.00
+0.50
0.00
+2.00
+0.50

0.00
-0.50
0.00
0.00
0.00

+1.00
0.00
+0.33
0.00
+1.00

0.00
0.00
0.00
0.00
0.00

0.00
+0.33
+0.33
0.00
+1.00

+2.67
0.00
-0.50
-0.67
0.00


99
100
100
100
94

100
100
88
81
99

90
100
89
100
86


20.10 c-1
18.40 m-z
18.40 m-z
18.57 1-z
20.90 a-c

18.37 m-z
19.50 c-q
.18.77 j-y
18.87 h-x
17.70 t-bb

19.70 c-p
18.83 i-x
20.17 b-k
19.03 f-u
18.17 p-z


4.23 g-o
4.40 d-j
4.43 c-i
4.80 b
4.33 e-1

4.70 bc
4.10 k-r
4.50 c-g
4.33 e-1
4.43 c-i

4.13 j-q
4.27 f-n
4.53 c-f
4.20 h-p
4.07 l-r


19.37 d-r 4.30 e-m
19.07 f-u 4.20 h-p
20.03 c-1 4.27 f-n
20.07 c-1 4.43 c-i
16.67 aa-bb 4.37 d-k


20.70 a-d
18.90 h-w
21.87 a
17.73 s-bb
19.23 d-s

18.73 j-y
17.47 u-bb
19.23 d-s
17.57 u-bb
20.23 b-j


4.17 i-p
4.40 d-j
4.63 b-d
4.27 f-n
4.50 c-g

5.20 a
4.07 1-r
4.10 k-r
3.87 g-r
4.37 d-k


3.50 c-i
3.17 e-i
4.33 a-e
2.83 g-j
4.00 a-g

3.17 e-i
4.67 a-c
4.00 a-g
3.33 d-i
3.67 b-i

3.00 f-j
3.50 c-i
2.50 i-j
4.33 a-e
4.33 a-e

3.67 b-i
3.67 b-i
3.33 d-i
4.67 a-c
4.17 a-f

3.00 r-j
4.00 a-g
4.00 a-g
4.17 a-f
3.67 b-i

2.83 g-j
5.00 a
4.67 a-c
5.00 a
5.00 a


4.33 a-e
4.00 a-g
3.83 a-g
1.83 j-m
3.00 d-k

3.67 a-g
3.83 a-g
4.33 a-e
4.00 a-g
4.67 a-c

3.33 b-i
2.17 h-m
3.33 b-i
2.17 h-m
4.00 a-g

2.00 i-m
4.00 a-g
3.33 b-i
3.33 b-i
3.67 a-g

3.83 a-g
5.00 a
2.00 i-m
4.67 a-c
3.00 d-k

2.83 e-k
3.00 d-k
5.00 a
5.00 a
4.00 a-g


Y -
Y --
Y --
W --
B nice appearance

B small kernels
B --
Y blunt .tip
Y dry tip


Y curved ear/dry tip
B short, curved, grn tip


green tip
large kernels


W green tip
y --
B green tip
Y curved, rough, uneven
Y too short

y --
y --
W --
y --
B big, wide ear

y --
W poor pollination
Y --
y --
W green tip


ak A


Tip
fill


Husk
cover


Kernel
.nl nr


Nntp /comm nrnnt


'a


a


kjul uL a L --- -- -L ----- ~-'`~'~'I LL~ ~


Table 1.






Sweet Corn Variety Trial Zellwood, FL 1991, cont'd.


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


ES-W4
BSS 3714
XP-147
-WSS 3686
Candy Store


-Silver Extra Sweet
Ssupersweet 8601
Ssupersweet 7801
Ssupersweet 7702
Apex


ERC
RNK
AG
RNK
HM

MM
AC
AC
AC
AM


SXPH 3009 AS
Even Sweeter AS
BSS 4019 RNK
Ssupersweet 7410 AC
Butterfruit Bicolor PK


52
100
71
S100
96

63
60
79
100
37


68
68
62
62
68


169 o-w
164 p-w
161 q-w
152 r-w
151 r-w

149 s-x
149 s-x
143 t-x
133 u-x.-
132 v-x


130 v-x
124 v-x
120 w-x
118 w-x
83 x


0.00
0.00
-0.33
0.00
-1.00

0.00
0.00
+0.33
-1.33
-1.33

-1.67
0.00
-0.67
-1.33
0.00


20.37 b-h
19.87 c-n
19.17 e-t
18.93 g-w
20.30 b-i

18.30 o-z
18.73- j-y
16.50 bb
18.57 1-z
18.73 j-y

21.60 a-b
19.70 d-p
17.27 y-bb
17.37 x-bb
20.73 a-d


4.30 e-m
4.30 e-m
4.43 c-i
4.17 i-p
4.00 n-r

4.57 b-e
4.30 3-m
4.13 j-q
4.00 n-r
3.83 r

4.10 k-r
4.23 g-o
3.97 o-r
3.87 q-r
4.43 c-i


5.00 a
5.00 a
4.33 a-e
4.33 a-e
3.67 b-i

3.83 a-h
4.33 a-e
3.67 b-i
3.67 b-i
4.33 a-e

3.50 c-i
3.67 b-i
4.00 a-g
4.67 a-c
4.33 a-e


1.67 k-m
4.00 a-g
4.00 a-g
2.67 f-1
2.00 i-m

3.67 a-g
0.83 m
5.00 a
2.83 e-k
4.67 a-c

5.00 a
1.33 1-m
4.00 a-g
5.00 a
1.33 1-m


green tips
blunt tip


W -
B green tips


w
W green tip, poor
W large kernels
B glossy kernels
Y --

Y
y --
S --
B --
Y small, nice
B green tip


Sunex 2643


83 x


+1.33


19.80 c-o


4.13 j-q


5.00 a


4.67 a-c


Y large kernel


ZMean separation by Duncan's Multiple Range Test, 5% level.


Table 1.


- - - - - - - - - - - - - - - - - - -






.fr'


Table 2. Temperature and rainfall at CFREC-Sanford (30
miles east of Zellwood) during the Spring 1991 sweet corn
season (March 29 June 10).


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

March 29-31 87 60 0.23

March 1-30 92 48 7.26

May 1-31 94 62 7.69

June 1-10 92 65 2.99

Total 18.17




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