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Group Title: Variety trials for Sh-2 type sweet corn
Title: Variety trials for Sh-2 type sweet corn, 1976
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Permanent Link: http://ufdc.ufl.edu/UF00075810/00002
 Material Information
Title: Variety trials for Sh-2 type sweet corn, 1976
Series Title: Variety trials for Sh-2 type sweet corn
Translated Title: Research report - UF Agricultural Research and Education Center ; CF-77-3 ( English )
Physical Description: Serial
Language: English
Creator: White, J. M.
Publisher: Agricultural Research and Education Center, University of Florida
Publication Date: 1977
 Record Information
Bibliographic ID: UF00075810
Volume ID: VID00002
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 144607719

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HISTORIC NOTE


The publications in this collection do
not reflect current scientific knowledge
or recommendations. These texts
represent the historic publishing
record of the Institute for Food and
Agricultural Sciences and should be
used only to trace the historic work of
the Institute and its staff. Current IFAS
research may be found on the
Electronic Data Information Source
(EDIS)

site maintained by the Florida
Cooperative Extension Service.






Copyright 2005, Board of Trustees, University
of Florida










AGRICULTURAL RESEARCH AND EDUCATION CENTER
Sanford, Florida

Research Report CF 77-3 July 21, 1976

Variety Trials for Sh-2 Type Sweet Corn, 97
HUME .....
J. M. White LIBRARY
Assistant Horticulturist S
SEP 27 1977
INTRODUCTION

Genes or hereditary factors determine the sugar t t-1 pt 'o
kernel. The sugar in sweet corn is controlled by the recesciVe-e~
relatively recent discovery of the shrunken 2 (sh2) gene, which produces twice
or more the amount of sugar found in regular sweet corn, has lead to the
development of new types or varieties of sweet corn called "Supersweet. "
These varieties retain sugar much longer after harvest and may be desirable
in shipping corn to distant markets.

MATERIALS AND METHODS

This experiment was conducted to test the yield and some plant
characteristics of the new sh2 types of sweet corn. It was a randomized block
experiment with six replications in Zellwood on Everglades mucky peat and
six replications in Sanford on Leon fine sand. Plot size was 3.0 feet
(Zellwood) and 2.5 feet (Sanford) times 30. 0 feet long. Seven varieties were
in the replicated trial and two varieties were in the observational
(2 replications) trial.

Prior to hand planting two seeds every 8 to 9 inches in Zellwood, 800 lb. /
acre of 5-5-8 fertilizer and a 2% parathion bait for wireworm control at 2 lb.
material per acre were broadcast and disked to incorporate. Plants were hand
thinned to one plant per 8 to 9 inches. In Sanford, 500 lb. /acre of 5-5-8
fertilizer was broadcast and disked in prior to planting one seed every 8 to 9
inches. Four side applications of 500 lb. /acre of a 10-4-10-3 fertilizer
were made.

A 50-50 mixture of Randox and Vegadex at the rate of 3. 0 lb. material of
each per acre was applied to control weeds. Methomyl was used on a daily
basis from silking until harvest for the control of corn earworm.

The Zellwood trial was planted on March 17, 1976, and harvested on
June 1 and 3. The Sanford trial was planted on March 19, 1976, and harvested
on June 2. Varieties grown in Sanford were harvested on the same day.
Therefore, optimum maturity for each variety was estimated because some
varieties were over mature while some were immature.









-2-


Ears were counted and weighed in pounds with husk on. Ear length
and width (diameter) measurements in centimeters were taken on a random
sample of ten husked ears per replication. Ear tip fill was assigned a value
of 5 when completely filled and a value of 1 if over one inch of the tip was not
filled, A value of less than 2.5 would be questionable for commercial fresh
market use. Husk cover would follow the same system as ear tip fill in that
a value of 2. 5 or less would be undesirable.

RESULTS AND DISCUSSION

The results of the Zellwood trial are found in Table 1 for the replicated
plot and Table 2 for the observational plot. There was no significant yield
difference in dozen ears per acre. E. S. 507-2 had the highest yield (1395
dozen/acre) in Zellwood and next to the lowest yield (1182 dozen/acre) in
Sanford. Florida Sweet 72F had the longest and heaviest ears at both
locations. Data for the Sanford trial are found in Table 3 for the replicated
plot and Table 4 for the observational plot. Again, there were no significant
yield differences in dozen ears per acre. E. S. 449-HB had the highest yield
(1397 dozen/acre) in Sanford and the lowest yield (1218 dozen/acre) in Zellwood.

Table 1. Replicated yield and size of Sh2 types of sweet corn trial, Zellwood,
1976.

2 3 3 4
Doz. 1 Avg. Avg. Avg. Rows Ear '5
Days to ears/ Tons/ ear ear ear of tip No. Husk
Variety harvest acre acre wt. length width kernels fill flags cover

ES 507-2 78 1395 6.3 .750 19.8 4.3 16.3 4.9 8.8 4.6
ES 449-C 79 1388 6.3 .756 18.6 4.3 15.0 5.0 7.5 5.0
Fla. Sweet 72F 77 1375 6.5 .782 20.6 4.3 16.5 5.0 9.3 5.0
ES 506-2 78 1354 5.9 .734 19.3 4.4 16.2 5.0 9.0 4.9
ES 505-2 76 1344 5.9 .727 18.8 4.2 16.0 5.0 9.7 5.0
ES 499-H-3 78 1355 5.9 .693 18.5 4.0 15.8 4.8 9.1 4.9
ES 499-H-B 78 1218 5.0 .689 18.6 4.1 15.8 5.0 8.4 5.0
LSD .05 N.S. 1.1

Tons per acre of unhusked ears.
2
Average ear weight in pounds.
3
Average ear length and width of ten husked ears in centimeters.
4Ear tip fill: 1= over 1 inch of tip not filled; 5=1/4 inch or less of tip not filled.
5
Husk cover: l=poor; end of ear exposed; 5=excellent; husk covers end of ear
and is tight.







-3-


Table 2, Observational yield and size of Sh2 types of sweet corn trial, Zellwood,
1976.

2 3 3 4
Doz. Avg. Avg Avg. Rows Ear
Days to ears/ Tons/ ear ear ear of tip No. Husk
Variety harvest acre acre wt. length width kernels fill flags cover

ES509-2 78 1266 6.0 .790 21.1 4.4 16.0 5.0 8.5 5.0
ES510-2 77 1243 5.4 .728 19.2 4.2 15.0 5.0 9.3 5.0




Table 3. Replicated yield and size of Sh2 types of sweet corn trial, Sanford, 1976.

2 3 3 4
Doz. Avg. Avg. Avg. Rows Ear 5
Days to ears/ Tons/ ear ear ear of tip No. Husk
Variety harvest acre acre wt. length width kernels fill flags cover

ES 449-H B 77 1397 5.7 .678 18.5 4.2 15.3 4.9 7.7 5.0
ES 505-2 76 1353 5.8 .715 18.2 4.2 15.8 5.0 8.5 5.0
ES 506-2 75 1314 5.9 .740 19.2 4.2 14.8 4.9 7.5 5.0
ES 449-G 77 1256 5.3 .709 18.9 4.2 14.7 4.7 8.0 5.0
ES 449-H3 77 1255 4.8 .641 18.3 4.1 15.2 4.7 7.5 5.0
ES 507-2 77 1182 4.8 .691 18.4 4.1 15.8 4.9 9.0 5.0
Fla. Sweet 72F 77 1178 5.2 .736 20.0 4.3 15.2 4.9 8.2 4.8

LSD .05 N.S. N.S.


Table 4. Observational yield and size of Sh2 types of sweet corn trial, Sanford, 1976.


Variety

ES 510-2
ES 509-2


Days to
harvest

76
78


Doz.
ears/
acre

1411
1210


Tons/
acre

6.2
4.9


Avg.
ears
wt.

727
685


2 3 3


2 Avg. Avg.3
ear ear
length width

19.4 4.4
19.2 4.1


Rows
of
kernels

14.7
14.3


4
Ear
tip
fill


5.0
5.0


No.
flags

6.7
9.0


5
Husk
cover

5.0
5.0


Tons per acre of unhusked ears.

2Average ear weight in pounds.
3
Average ear length and width of ten husked ears in centimeters.

4Ear tip fill: 1=over 1 inch of tip not filled; 5= 1/4 inch or less of tip not filled.
5
Husk cover: 1= poor; end of ear exposed; 5=excellent, husk covers end of ear and
is tight.


e


s


e


i .




Table 2. Summary of data for cabbage, Observational lines, Sanford, Florida, 1975-76
Crates Lb. Polar Core Equatorial Shape Core
Seed Days to % Heads per per diameter length diameter ind.x index Holding Plant Head
Variety source Lot No. harvest cut acre head (P) (C) (D) P/D C/P quality uniformity uniformity


XP-1069
Earliana
NOX 910
Synargreen
Exp Hyb 1554


Exp 926 A
Ncx 9021
DCS-36A3XB16
DCS-36A3XLL2M
cOX 9016

Ncx 9018
NCX 9022
Exp 6463
DSC-25A3XB14
* Exp 921E

Exp 926C
Ncx 9017
NSX 9020
Baby Red Early
Hyb 12

926B
926D
Ex Hyb 1562
Savoy Ice Queen
Savoy Ostara

540 CBRR
Baby Red Late
Winter White III
Winter White II


A2
S2
N1
92
K

N2
N1
N2
Ni

N1

K
N2
N2

N2






K
F1
S2
Al

N2
52
K
S2

F
82

S2


M-73505
me a
75-2025
an -
-- m


75-203
75-GH
75-c6
75-2335

75-2037
75-2127
a-e
75--
a--a

-- a
75-2105
75-2027

-s-r


a--
a--l
wma

a-a-
a- a
a--
"""


92
92
92
92
96


103
103
103
103
106

106
o06
io6
106
106


ULO
11o
nio
110
11o
no

no


113
113
113
117
117


117
117
-a -


84
96
84
80
96


100
84
96
96
96

84
100
88
100
100

100
92
92
88
64


100
100
92
100
96


84
76


539
527
515
303
494.

857
807
197
672
787

717
699
599
594
924

843
593
510
416
214

999
979
592
579
480

438
352
ama
a--


2.34
2.00
2.24
1.38
1.88

3.13
3.50
3.03
2.55
2.99

3.11
2.55
2.49
2.17
3.37

3.08
2.35
2.02
1.73
1.22

3.65
3.57
2.35
2.11
1.83

1.90
1.69
a-fl


14.1
12.6
12.8
12.4
13.2

14.2
15.6

15.1
15.5

16.0
16.2
13.4
13.4
13.5

15.0
11.8
13.5
13.9
15.8

14.5
12.6
14.7
14.0
14.2

12.7
14.1
-a-
@*"d


7.7
6.5
5.8
6.1
5.9


8.0
10.8
7.4
6.2
8.1

7.8
6.8
4.1
6.7
8.5

9.2
6.0
7.5
5.6
7.7

6.7
8.0
7.7
7.5
5.6


3.8
6.9
qmmm
ad.


13.0
12.5
12.7
n11.8
12.9

14.8
15.2
14.4
14.3
14.9


14.5
15.5

12.7
11.3
15.2

14.4
12.3
12.2
12.3
13.6

13.T
15.4
14.0
15.0
12.3

11.5
10.1
a- -
comm
---


1.1
1.0
1.0
1.1
1.0

1.0
1.0
1.0
1.1
1.0

1.0
1.1
1.1
1.2
0.9

1.0
1.0
1,2
1.1
1.1
1.2

ii
0.8
1.1
0.9
1.2

1.1
1.4


0.6
0.5
0.5
0.5


0.6
0.7
0.5
0.4
0.5

0.5
0.4
0.3
0.5
0.5

0.6
0.5
0.6
0.4
0.5

0.5
0.6
0.5
0.5
0.4

0.3
0.5


an. m6 %


.em-


iftm


4.o
1.5
2.0
4.0
4.0


4.0
4.0
4.0
4.0
4.0

4.0
4.0
3.5
4.0
4.0

4.0
4.0
4.0
4.o
4.0


4.0
4.5
4.0
4.5
4.5

4.5
4.5
-- m
ma.


3.5
3.5
3.0
4,5
4.0

4.5
2.5
3.5
4.0
3.0

3.5
3.0
4.0
4.0
4.o

4,5
3.0
1.0
3.0
0.5

4.5
4.5
3.0
3.5
4.0

1.0
3.0
---m
earn


3.5
3.5
2.0
4.0
3.5

4.5
2.5
3.5
3.5
3.5

3.5
3.0
3.5
4.0
4.0

4,5
3.0
2.5
2.5
1.0

4.5
4.5
2.0
3.5
2.5

1.5
1.5
a--
...






Mechanical Black
Plant Head Head harvest Firm- Tough- Internal Downy Black Storage speck
Variety color cover shape index Flavor ness ness quality mildew Alternaria rot rating index Comments


XP-1069
Earliana
NCX 910
Synargreen
Exp Hyb 1554


Exp 926A
NCX 9021
DCS-36A3XB16
DcS-36AXL2M
NOX 9016

NCX 9018
NCX 9022
Exp 6463
DSC-25A3XB14
Exp 921 E

Exp. 9260
NCX 9017
NCX 9020
Baby Red Early
Hyb 12

926B
926D
Ex Hyb 1562
Savoy Ice Queen
Savoy Ostara

540 CBRR
Baby Red Late
Winter White III
Winter White II


BG-G
Y-G
LG
G
G


--- S-R
-- R
--- S-R
-- R
2.5 R


3.5
2.0
3.0
2.0
3.5

3.0
4.0
3.5
3.0
4.0

4.0
2.5
2.0
3.0
0.5

4.0
4.5
2.0
4.5
4.0


BG
BG
BG
BG
BG

DG
G
LG
BG

BG
BG

R


BG
BG
LBG
DG
DG


Sl-F
R
R
S-R
B


S-R
R
0
S1-F

R
Sl-F
S-R

V

R
F
R
SI-P
S-R


2.0 0
3.5 E-0


a


ma


d-


3.0
2.5
1.5
4.0
3.0


3.5
2.5
3.0
3.0
2.0

3.5
3.0
3.5
3.5
3.5.

4.0
2.0
1.5
2.0
0.0

4.0
4.0
1.5
4.0
3.0


1.5
2.5
--


am m a


3.0
2.0
3.0
2.0
2.5

4.0
4.0
2.5
4.0
3.5

3.0
4.0
4,5
2.0
4.5

4.0
3.5
2.0
2.0
V

3.5
3.0
2.5
0.5
1.0


1.0
1.5
an


4.0
4.0
2.5
3.5
3.0

4.0
3.5
4.0
3.0


4.0
4.0
4.5
4.5
3.0

4.0
4.0
4.0
4.O
4.0

4.0
4.0
4.0
0.5
1.5


3.5
4.5


2.5
1.5
3.0
1.5
2.5

2.5
3.0
3.5
3.5
2.5

2.0
3.0
3.0
2.5
3.0

2.0
2.5
3.5
3.0
2.0

3.0
3.5
3.5
3.0
3.0

3.0
4.5
"-


4.0
2.5
2.5
3.5
2.5


3.5
3.5
3.0
4.0

4.0
4.0o
4.5
4.0
3.0 .

3.5
3.5
4.0
4.0
4.0

3.5
3.0
3.5
1.0
2.5


4,.5
4.0
-


1.0
4.0
2.5
2.5
1.0


2.5
1.0
2.0
0.5

2.0
2.0
1.5
T



1.0
2.0
nan
2.0

T
T
0.5



3.5

-a


a-a

- mm
f a
ama


S
8



sa
S



imn
--a
S
a m


--I
--




-a
--
s r


-i-
-R-


-- a
am -

a am
---




s

ma
ann





S
S
aua



-aw

-a a
a--
se4me
S


m--
an


a aol a ma m


4.0
2.0
4.5
3.5
4.0


4.0
3.0
4.5
0.7
4.0

3.5
2.5
3.0
5.0
4.0

4.0
4.0
4.0
4.0
4.o
4.5
4.0
5.0
5.0


4.0
an


Sm


1.0
1.3
1.1
0.8
0.8

0.6
0.6
0.9
3.0
1.2


has potential
1 brn stem, not adapt.
not adapt.
too small, not adapt.


has potential
large, not adapt.
has potential

60% brown stem


1.3 has potential
2.6 has potential
1.7 has potential
1.3
0.5


0.9
1.6


has potential, off shape
red veins


1.0 tip burn, not adapt.
a- good red, needs work
0.8 variable


0.7
1.0
0.8
0.0
0.0


flat heads
purple interior, not adapt.
small heads
small heads


0.5 wide, short core
"-- tall plants
-- did not head
.a did not head


TJable 2 1


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