Report to the Oregon Processed Vegetable Commission
2007–2008
1.
Title:
Broccoli Breeding, Evaluation and Seed Production
2.
Project Leaders:
James R. Myers, Horticulture
Brian Yorgey, Food Science and Technology
3.
Cooperators:
None
4.
Project Status:
Terminating 30 June, 2008
5.
Project Funding:
$6,795
breeding
$3,159
processing
$9,954
total
Research efforts were focused on testing various inbred combinations for hybrid production, and evaluating commercial cultivars for adaptation to Oregon growing conditions
and for head rot resistance. Breeding funds were used for a major portion of the support
of a vegetable breeding technician, student labor, supplies, and research farm expenses.
Processing funds were used for processing samples of experimental hybrids.
6.
Objectives:
I.
Develop broccoli varieties adapted to western Oregon with suitable quality, high yields, and disease resistance. Specific traits include:
a. Early to midseason maturity
b. Concentrated yield potential
c. Downy mildew & head rot resistance
d. Exerted heads with large openly branched heads with heavy, clean
stem for easy trimming and separation into spears and chunks
e. Firm, uniform florets of good color
f. Fine beads with short pedicels, which are retained after freezing
II.
7.
Evaluate cytoplasmic male sterility (CMS) as a method for producing F1
hybrid seed.
Report of Progress:
Greenhouse inbred and hybrid seed production: Cuttings were taken from inbreds and
breeding lines grown in the field in 2006 to establish material for crossing and hybrid
seed production in the greenhouse during the winter of 2006-2007. A total of 14 cross
combinations (Tables 1 & 6) were obtained.
Yield Trial: Eight hybrid combinations were tested in replicated yield trials (Tables 1 &
2, Figure 1). Entries were seeded in the greenhouse on 11 June, and then transplanted on
19 July into 30 ft rows spaced 30 in between rows with four replications. Within row
spacing was 12 in. between plants. Data were collected at harvest maturity on plant and
2007-2008 Broccoli Breeding Progress Report
head characteristics, and yield, and a sample of each hybrid was sent to the OSU Food
Science and Technology Pilot Plant for processing and evaluation. Data from the Pilot
Plant had not been completed at the time of this report and will be reported separately.
Three check hybrids (Regal, Arcadia, and Emerald Pride) were included for comparison
to experimental hybrids.
Five of the experimental hybrids had maturities similar to Emerald Pride and Arcadia (52-53 days) while two were earlier and one was slightly later. Two experimental
hybrids (S387 x S446, and S449 x S454) had yields (net ton/acre) statistically equal to
Regal, the hybrid with the highest yield (Table 1, Figure 1). Only one hybrid (S448 x
S454) had significantly lower net yield compared to Emerald Pride and Arcadia. The trial
was much more uniform this year than last, with much lower numbers of immature
(young) and over mature (cull) heads. We continue to observe significantly lower proportion of leaves (4-11% of total weight) attached to the stem of harvested heads for OSU
experimental hybrids compared to commercial checks (22-30%) (Table 1). This year we
initiated a pilot study to examine proportion of the head that constitutes florets relative to
stem. This arose from the observation that while many OSU hybrids have lighter heads
than the checks, they have proportionally more of their weight concentrated in the florets.
We floretted a sample of ten heads per line and calculated florets as a percent of total
head weight. The data were not replicated, but it appears that most OSU hybrids and Arcadia and Emerald Pride have similar percent florets, whereas Regal had a lower ratio of
florets to total head weight. Next year we will repeat this effort with replication to provide a statistical basis for our observations.
From observation data on the yield trial (Table 2), we identified 2 new hybrids
(S448 x S454 and S449 x S454) that show potential, although S448 x S454 had lower
yield, and S449 x S454 had a fairly flat head and lacked good segmentation but had excellent yield. Four previously evaluated hybrids that did well were S387 x S446, S387 x
S454, S445 x S454 and S447 x S454, with S387 x S446 having very good yield, S387 x
S454 and S445 x S454 showing excellent uniformity, and S447 x S454 looking especially
good for several qualities including head shape, stem color, exsertion, segmentation and
uniformity. When examining hybrids that have been tested over several years (table 3),
we found that S387 x S454 had good yields again this year, unlike last year, when it had
very low yields compared to previous years. Last year’s data were apparently due to uneven plant stands and uniformity caused by our transplanting method. S445 x S454 appears to have consistently good performance across years.
A head rot screening trial of commercial broccoli hybrids and selected OSU lines
was planted on 20 July in 30 in. rows, and thinned to a 9 in. within row spacing. Data on
head rot incidence and severity were recorded at actual maturity for each variety. Head
rot incidence and severity in ‘Emerald Pride’ (susceptible check) was 88% and 6.3 on a 9
point scale, respectively (Table 4). Several commercial hybrids had significantly less
head rot than the most susceptible hybrid (Arcadia), including Heritage, Avenger, Iron
Man, Everest, Green Goliath, Marathon, and Maximo. Hallmark, which showed very
good resistance last year, had very poor stand this year and was not included in the data.
It is not clear why Arcadia had such a poor performance with head rot because this hybrid
is usually considered to be more resistant than Emerald Pride, but we may have been late
in collecting data for this hybrid. Of the OSU material, S446 x S454 showed very poor
2007-2008 Broccoli Breeding Progress Report
resistance (not statistically different from Arcadia, the most susceptible variety in the
trial), while S387 x S410, S447 x S454, and S387 x S454 showed susceptibility in the
range of Emerald Pride. The OSU OP population showed some resistance again this year,
as did (CMS 13-1 x S454) x S446 (both statistically equal to Maximo, the best in the
trial). It is perhaps not surprising that the OSU OP population shows some resistance,
since it has been selected for head quality and performance under Oregon growing conditions for the past seven years now. It is interesting that the CMS and normal versions of
S454 when crossed to S446 yield such different results. It may be possible that the CMS
source brought in additional traits for head rot resistance that are not present in the OSU
materials. Empirical observations this year revealed that the overriding factor in head rot
resistance in broccoli appears to be bead size and density. This would explain why Hallmark with its very fine (intermediate to cauliflower) bead size had such high levels of resistance in 2006. Heads in the button to 5 cm (2 in) stage were generally not susceptible
to head rot, and then became most susceptible from 5 cm up to about 9 cm (3.5 in), with
head rot susceptibility decreasing (but never to the same low levels as young heads) as
heads mature.
Observation Trials: These trials included 22 inbreds, 11 lines under selection, and 13
hybrid combinations (Table 5 and 6). After evaluation, cuttings from inbreds were rooted
in the greenhouse to be used in selfing and crossing during the winter of 2008. Among
lines under selection, 04-3-2-2 stands out as being exceptional for large heads with very
find beads on a highly exserted stem (Table 6). This line will be fast-tracked for hybrid
combining ability testing. We determined that these plots were uniform enough to continue with propagation and selection on a plot, rather than an individual plant, basis. Six
of the hybrids in the observation trial were tests of CMS lines as parents, which generally
performed well (table 6). Of the normal (non-CMS) hybrids in the observation trial, S449
x S387 looked especially good, with very nice heads and good uniformity. S387 x S448
also looked very good. A number of inbred line cross combinations have been tested in
the past 8 years (Table 7) but additional testing is still needed among the S440 series inbreds.
Cytoplasmic Male Sterile (CMS) Facilitated Hybrid Seed Production: Selected OSU inbreds (S442, S445 and S446) were used as pollen parents in isolated crossing blocks at
the Vegetable Farm. They were planted in combination with a set of CMS lines which
had been backcrossed into one of three inbred backgrounds (S410, S411, and S454). The
trials were used to evaluate potential crossing ability with 3 OSU inbreds, and to produce
seed (table 8). Not all combinations worked well, but some did, with one cross, (CMS
14-1 x S411) x S445 being especially successful.
8.
Summary:
Trials at the Vegetable Research Farm included a yield trial of OSU derived hybrids, observation trials of OSU inbreds and hybrids, and head rot trial of commercial hybrids and some OSU hybrids. We see progress in the OSU material with the most recently derived inbreds being the best. It is of interest that the OSU OP population had a
relatively low head rot incidence, and perhaps we are making progress in selecting material more tolerant of head rot. Another season of evaluation would be useful in this regard.
2007-2008 Broccoli Breeding Progress Report
z
Table 1. Yield data from a hybrid broccoli trial, Corvallis, 2007.
Gross T/A
Young
Heads
T/A
Culls
T/A
Net T/A
Net
Heads/A
Head
Diameter
(cm)
%
Leaves
% Floy
rets
0.9
3.64
0.02
2.6
4.60
0.05
0.00
3.40
15827
11.7
6.1
55
0.07
4.27
15246
12.4
4.6
60
29.0
5.1
4.40
0.07
0.00
4.17
15101
13.5
3.7
57
49
27.8
3.5
3.75
0.07
0.04
3.31
14665
11.6
9.0
57
S446 x S454
52
28.8
3.5
4.78
0.14
0.03
4.07
14810
12.7
11.3
55
S447 x S454
52
28.8
5.2
4.63
0.12
0.09
4.16
12923
13.6
6.3
54
S448 x S454
48
28.5
8.9
3.42
0.08
0.22
2.79
12342
11.7
9.8
54
S449 x S454
52
28.5
1.8
4.60
0.03
0.01
4.30
15827
13.1
5.7
58
Arcadia
53
28.5
0.9
6.40
0.18
0.25
4.09
13504
12.0
29.7
57
Emerald Pride
52
28.3
4.5
5.52
0.07
0.00
4.23
14956
12.8
22.4
59
Regal
46
28.0
4.6
6.96
0.08
0.01
5.21
14810
12.5
23.9
52
1.2
5.7
0.78
0.11
0.10
0.95
2183
0.9
5.9
Days to
Harvest
No. Plts/
Plot
% Blind
Plants
S387 x S443
52
28.5
S387 x S446
55
29.0
S387 x S454
53
S445 x S454
Hybrid
LSD 0.05
z
Planted July 19 in 30' plots, rows 30" apart, thinned to 12" between plants. Mean of four replications.
y
% florets calculated as head weight minus stem weight for 10 heads; not replicated.
2007-2008 Broccoli Breeding Progress Report
Table 2. Observation notes from a broccoli yield trial, Corvallis, 2007.
Line
S387 x S443
S387 x S446
S387 x S454
Maturity
z
(days)
Head
Ht
(cm)
Plant
Ht (cm)
Head
y
Shape
Bead
x
Size
Stem
w
color
Exserw
tion
Segmentw
ation
Uniforw
mity
Branchw
ing
Overall
52
55
53
60
53
51
65
58
56
6
6
4
C
M
M
7
7
7
8
6
7
5
5
7
6
6
7
1
3
4
5
7
7
w
S445 x S454
49
50
58
4
F-C
7
6
4
8
1
8
S446 x S454
52
48
54
6
M-C
7
6
3
5
3
5
S447 x S454
S448 x S454
52
48
44
52
51
62
7
6
F
F
8
7
7
7
8
7
8
5
3
5
9
8
S449 x S454
Arcadia
Emerald Pride
Regal
52
53
52
46
36
47
46
37
44
64
67
48
4
5
5
6
M
F
M
M
7
6
6
5
5
4
3
3
3
2
1
1
6
3
5
5
3
3
3
7
6
3
4
4
z
Planted July 19.
Scale of 1 - 9 where 1 = concave and 9 = extreme dome.
x
F = fine; M = medium; C = coarse.
w
Scale of 1-9 where 1 = poor and 9 = excellent.
y
2007-2008 Broccoli Breeding Progress Report
Notes
Basal lodging
Strong apical
dominance; 1
bolter
Basal lodging;
variable maturity
Basal lodging;
variable maturity
Strong apical
dominance
Variable maturity
z
Table 3. Yield data (net T/A) from eight years of broccoli yield trials, Corvallis, 2007
Entry
S387 x S410
S387 x S411
S387 x S438
S387 x S443
S387 x S445
S387 x S446
S387 x S454
S396 x S445
S396 x S446
S396 x S454
S398 x S438
S398 x S445
S398 x S446
S398 x S454
S399 x S453
S399 x S454
S400 x S438
S400 x S445
S400 x S446
S400 x S453
S400 x S454
S410 x S442
S410 x S445
S410 x S446
S410 x S447
S410 x S453
S410 x S454
S411 x S445
S411 x S446
S411 x S453
S411 x S454
S438 x S442
S440 x S446
S442 x S411
S442 x S454
S443 x S454
S445 x S454
S446 x S454
S447 x S410
S447 x S411
S447 x S454
S448 x S454
S449 x S454
Arcadia
Excelsior
Legend
Regal
Emerald Pride
LSD 0.05
2000
2001
2002
Tons/Acre
2003
2004
4.62
2.45
2005
1.39
2006
2007
2.82
3.4
3.79
3.83
2.73
4.14
1.83
2.64
1.88
5.67
3.66
4.12
5.40
6.40
3.34
1.32
4.27
4.17
4.90
4.30
4.24
2.56
4.37
5.20
4.99
3.26
3.36
1.84
3.06
3.90
3.05
2.87
2.36
5.10
3.80
2.32
3.87
3.43
3.44
3.79
3.72
5.35
3.58
3.70
2.96
3.49
3.96
4.22
5.70
1.36
1.46
3.79
5.30
3.30
4.23
2.72
4.22
3.92
5.28
3.65
5.10
3.65
3.14
4.07
3.73
2.43
3.23
3.95
3.63
0.52
0.84
3.78
4.32
4.97
4.71
1.39
6.10
3.70
3.40
4.83
3.68
4.29
3.41
2.31
2.24
3.90
3.43
2.25
4.45
5.30
3.40
0.90
4.17
4.54
0.93
3.30
4.32
0.79
3.62
3.91
z
Uneven number of plots in 2006 prevented calculation of LSD.
2007-2008 Broccoli Breeding Progress Report
3.31
4.07
4.16
2.79
4.30
4.09
5.21
4.23
0.95
z
Table 4. Head rot incidence and severity in selected broccoli cultivars and lines from a head rot trial, Corvallis, 2007
Entry
Arcadia
Avenger
Emerald Pride
Everest
Green Goliath
Green Magic
Heritage
Iron Man
Liberty
Marathon
Maximo
Packman
Premium Crop
Tradition
Source
Maturity
Date
Sakata
12-Nov
Sakata
Sakata
Johnny's
Seminis
Sakata
Seminis
Seminis
Seminis
Sakata
Sakata
Nichols
Takii
Seminis
18-Nov
10-Oct
22-Oct
16-Nov
1-Nov
18-Nov
21-Nov
12-Nov
16-Nov
21-Nov
6-Oct
22-Oct
14-Nov
Total No. Plants
Rep
Rep
Rep
1
2
3
30
30
26
27
21
27
26
27
26
30
28
26
25
28
25
27
29
24
25
28
29
26
24
23
28
25
24
24
24
25
24
26
27
28
23
28
27
27
23
31
25
25
y
% Infected
Rep
Rep
Rep
1
2
3
100
100
92
59
86
33
88
100
69
90
93
62
52
86
96
56
59
88
64
29
86
58
63
87
46
56
96
79
92
76
92
31
63
93
70
39
100
56
22
52
88
100
Average
% Infecty
ed
Severity
97
5.7
65
88
43
60
93
66
64
93
55
43
78
88
82
4.0
6.3
2.3
3.7
7.7
3.0
2.7
6.3
4.3
3.7
4.3
6.3
3.3
x
OSU OP Population
(CMS 13-1 x S454) x S446
S387 x S410
S387 x S454
OSU
OSU
OSU
OSU
10-Oct
14-Nov
30-Oct
6-Oct
27
21
25
19
25
24
23
16
24
29
25
18
52
86
100
68
76
58
100
63
46
52
56
67
58
65
85
66
4.3
3.3
5.3
7.0
S446 x S454
S447 x S454
LSD 0.05
OSU
OSU
30-Oct
12-Nov
25
26
28
26
25
23
100
77
100
73
84
70
95
73
25
7.0
5.0
2.5
z
Planted July 20 in 30" rows, thinned to 9" between plants.
Percent of infected heads at maturity for each variety, based on actual counts.
x
Average of 3 reps; scores based on a 1-9 scale with 9 = severe
y
2007-2008 Broccoli Breeding Progress Report
Notes
Leaves cover
heads
Variable; severity
scores range from
2-9
Even immature
heads are infected
z
Table 5. Broccoli observation trial, OSU inbreds, Corvallis, 2007.
Maturity
(days)
Head Ht
(cm)
Leaf Canopy Ht (cm)
Head
Diam
(cm)
Head
y
Shape
Stem
x
Color
Bead
w
Size
Head
Exserx
tion
Head
Segmentx
ation
Plot Unix
formity
Branch
x
-ing
Overall
x
Score
ORCR1
HS143
HS179-1
S233B
82
47
44
53
38
31
53
43
49
46
48
50
8
7
10
14
5
7
6
8
5
3
5
7
F
C
C
C
3
3
9
6
1
1
1
1
3
3
7
9
5
7
7
3
3
3
5
5
S315
82
51
65
16
7
3
F
6
8
7
5
7
S352
60
43
68
11
4
5
C
3
1
5
1
3
S370
46
49
42
13
7
7
M-C
9
1
7
5
6
S387
66
50
64
11
7
5
C
7
7
1
7
5
S403
S410
S411
S437
S438
S440
53
53
60
53
53
60
47
43
55
42
44
50
50
52
57
54
55
45
13
12
13
16
10
13
7
7
5
6
6
7
5
5
7
7
7
5
M
F
F
C
F
C
8
6
7
7
7
9
7
8
7
2
5
3
3
6
3
6
6
3
1
3
5
3
5
5
6
7
7
5
6
6
S442
82
49
59
12
6
5
F
6
9
5
3
4
S443
S445
53
60
53
58
59
55
13
12
7
6
7
5
F-C
M
7
9
5
3
1
6
5
3
5
7
Inbred
2007-2008 Broccoli Breeding Progress Report
Notes
Chlorotic lower
leaves
Uneven stand
Strong apical
dominance
Uneven stand;
strong apical
dominance
Some leafy
heads
Poor stand; variable maturity
Uneven maturity;
some aphid infested heads
Uneven maturity
Small heads
Uneven maturity
Some heads
huge but loose
and full of tiny
leaves
Variable bead
size; uneven
maturity
z
Table 5. Broccoli observation trial, OSU inbreds, Corvallis, 2007 (cont).
Maturity
(days)
Head Ht
(cm)
Leaf Canopy Ht (cm)
Head
Diam
(cm)
Head
y
Shape
Stem
x
Color
Bead
w
Size
Head
Exserx
tion
Head
Segmentx
ation
Plot Unix
form-ity
Branch
x
-ing
Overall
x
Score
S446
60
51
65
13
6
5
F
6
3
1
1
6
S447
S448
66
53
62
59
58
61
15
10
6
8
5
5
F
F
8
8
7
8
3
7
1
5
6
7
S449
S454
60
60
38
55
50
57
17
12
6
7
7
7
F-M
F
3
8
3
7
5
6
1
7
4
0
Inbred
z
Planted July 19 in 30" rows, thinned to 12" apart.
Scale of 1-9 where 1 = concave, 3 = flat, 5 = slight dome, 7 = moderate dome and 9 = extreme dome.
x
Scale of 1-9 where 1 = poor and 9 = excellent.
w
F = fine, M = medium, C = coarse.
y
2007-2008 Broccoli Breeding Progress Report
Notes
Variable maturity
Variable maturity; some leafy
heads
Soft heads
Nice conventional type
z
Table 6. Broccoli observation trial, OSU hybrids and breeding lines, Corvallis, 2007.
Maturity
(days)
Head
Ht
(cm)
Leaf
Canopy Ht
(cm)
Head
Diam
(cm)
RS1-1-2-3
53
72
69
04-3-2-2
53
57
04-3-2-3-1
47
04-3-2-4-2
Bead
w
Size
Head
Exserx
tion
Head
Segmentx
ation
Plot
Uniformx
ity
Branchx
ing
Overall
x
Score
3
F
9
9
3
7
7
6
7
F
8
8
8
3
9
Tallest in field; head
loose & soft
Huge uniform headslarge heads become soft
13
5
7
F-M
6
5
3
3
7
Uneven maturity
66
13
7
7
F
7
9
5
7
6
Leaves in head
52
43
18
6
3
F
7
5
7
9
6
53
45
55
13
8
7
M
7
3
9
1
8
Uneven bead size
Lacks good segmentation
but otherwise very nice
04-4-2-2
53
44
55
14
5
7
F
6
7
6
1
7
04-5-2-1-3
53
53
55
13
8
4
M-C
7
1
5
7
5
Small heads
04-5-2-2-2
53
50
67
15
4
7
F
6
5
5
1
7
04-5-2-2-3
53
54
67
14
5
8
F
7
4
3
3
7
Heads lack purple cast
Still segregating but
overall nice type
04-5-3-3-2
53
47
60
15
7
8
M
6
7
7
5
7
S387 x S445
47
45
57
13
5
5
C
6
1
5
1
5
S445 x S387
47
45
56
13
6
7
M
6
3
5
1
6
S387 x S447
60
58
64
13
5
9
F
6
5
3
5
4
S387 x S448
53
66
71
11
8
5
F
9
5
8
3
8
S387 x S449
53
54
64
15
5
7
M
7
4
8
3
8
S449 x S387
60
61
61
17
4
7
F
6
5
8
5
9
S443 x S454
44
47
52
15
3
7
C
7
2
5
3
5
Head
y
Shape
Stem
Colx
or
15
8
63
19
48
52
60
59
04-4-1-1-3
60
04-4-1-1-4
Hybrid
2007-2008 Broccoli Breeding Progress Report
Notes
Variable bead size
Small heads but very tall
& exserted
Very nice heads
z
Table 6. Broccoli observation trial, OSU hybrids and breeding lines, Corvallis, 2007 (cont).
Maturity
(days)
Head
Ht
(cm)
Leaf
Canopy Ht
(cm)
Head
Diam
(cm)
CMS1-1 x
S454 BC2
60
53
52
CMS6-1 x
S411 BC4
53
45
CMS7-2 x
S410 BC4
60
CMS12-2A x
S410 BC4
Bead
w
Size
Head
Exserx
tion
Head
Segmentx
ation
Plot
Uniformx
ity
Branchx
ing
Overall
x
Score
5
F
7
8
6
3
7
9
3
M
7
5
3
3
5
12
5
7
M
6
6
4
3
5
55
15
6
7
F
7
0
5
3
7
56
63
13
7
7
F
6
8
4
5
7
Variable plot
57
72
13
5
5
M
7
3
3
3
6
Variable maturity
Head
y
Shape
Stem
Colx
or
14
7
59
17
52
58
60
52
CMS13-1 x
S454 BC2
60
CMS14-1B x
S411 BC4
53
Hybrid
z
Planted July 19 in 30" rows, thinned to 12" apart.
Scale of 1-9 where 1 = concave, 3 = flat, 5 = slight dome, 7 = moderate dome and 9 = extreme dome.
x
Scale of 1-9 where 1 = poor and 9 = excellent.
w
F = fine, M = medium, C = coarse.
y
2007-2008 Broccoli Breeding Progress Report
Notes
z
Table 7. Inbred line combinations tested in 8 years of broccoli yield trials, Corvallis, 2007 .
Inbred Line
S410
S411
S438
S442
S443
S445
S446
S447
S453
S454
S387
S396
S398
S399
S400
S410
S411
S438
S440
S442
S443
S445
S446
S447
S448
S449
2
0
0
0
0
1
0
0
0
0
0
1
0
1
0
1
0
0
0
0
0
0
0
1
2
1
0
1
0
0
0
0
0
0
0
0
0
1
1
1
0
1
1
1
0
0
0
0
3
2
2
0
1
2
3
0
1
0
0
0
0
0
0
0
0
2
1
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
7
3
2
1
4
5
5
0
0
3
1
5
4
3
1
1
z
Number in each cell indicates the number of times this combination has been tested.
2007-2008 Broccoli Breeding Progress Report
z
Table 8. Seed Set and Harvest for OSU Broccoli CMS Inbred Lines, Corvallis, Oregon, 2007
Crossed
To OSU
Inbred
% Silique
Set
Weight of
Harvested
Seed (g)
CMS 5-3 x S410
S442
near zero
0
CMS 7-2 x S410
S442
near zero
0
CMS 6-1 x S411
S442
1
1.3
CMS 14-1 x S411
S442
near zero
0
CMS 9-1 x S454
S442
1
1.1
CMS 13-1 x S454
S442
25
7.3
CMS 5-3 x S410
S445
10
5.1
CMS 7-2 x S410
S445
near zero
0
Inbred
CMS 6-1 x S411
S445
variable
7.6
CMS 14-1 x S411
S445
50
70.0
CMS 9-1 x S454
S445
near zero
0
CMS 13-1 x S454
S445
near zero
0
CMS 5-3 x S410
S446
none
0
CMS 7-2 x S410
S446
none
0
CMS 6-1 x S411
S446
1
1.7
CMS 14-1 x S411
S446
near zero
0
CMS 9-1 x S454
S446
1
0.9
CMS 13-1 x S454
S446
25
6.2
Notes
Variable seed set from plant to plant
Most plants with less than 0.01% silique
set; one plant with much better set--this was
saved as a single plant
Variable seed set from plant to plant
Planted May 1 in 3 separate, isolated crossing blocks, based on OSU inbred parent.
2007-2008 Broccoli Breeding Progress Report
Figure 1. Broccoli Yield Trial 2007
5.50
5.21
4.17
4.23
4.27
4.30
S387 x S446
S449 x S454
Arcadia
4.16
Emerald Pride
4.09
S387 x S454
4.07
S446 x S454
4.50
S447 x S454
5.00
4.00
3.50
T/A
3.00
3.31
3.40
2.79
2.50
2.00
1.50
1.00
0.50
Line
2007-2008 Broccoli Breeding Progress Report
Regal
S387 x S443
S445 x S454
S448 x S454
0.00