50%-Tropical GEM Program at NC State
Scope of program
2004 Results
Major Goodman, Joe Hudyncia, and Mike Jines
Department of Crop Science and USDA/ARS
N. C. State University
Standard Plots Grown by 15 cooperators: 9,200
(11 company locations, 2 other
universities, 2 USDA-ARS sites)
Standard Plots Grown by
NC State (5 locations):
6,342
Additional GEM Plots at NC State
(tester, CML-type line, GEM inbred
development, and breeding cross
evaluations):
6,712
TOTAL NC YIELD TRIAL PLOTS
22,234
Seeds of the following families are
available for distribution now.
Complete lists of all families in these
trials are available for the cost of an
e-mail.
(maize_resources@ncsu.edu or
major@nc.rr.com).
DK212T N11 F2S2 x FR992.FR1064 (EX87)
3315-003/00
175.4
19.5
86.3
3320-005/00
167.7
18.8
91.8
Check mean
179.2
18.6
91.1
DK697
183.3
19.7
89.8
DK743
173.5
21.1
90.1
HC33.TR7322
155.3
16.6
94.5
LH200.LH262
179.9
19.3
85.8
P31G98
199.1
18.4
89.6
P32K61
174.6
17.9
95.5
23 Env. CV:
10.9
5.2
15.5
DK888 N11 F1S2s x FR992.FR1064 (EX89)
3607-034/00
165.0
19.4
85.1
3620-028/00
162.1
18.5
86.4
Check mean
171.8
18.4
87.9
DK687
167.3
18.5
89.5
DK697
178.7
19.8
84.6
DK743
171.5
20.4
81.6
FR1064.LH185
154.7
17.7
87.3
LH200.LH262
164.7
18.8
84.5
P31G98
194.3
18.2
87.8
P32K61
172.4
18.1
93.2
24 Env. CV:
10.2
6.6
12.1
DKXL380 N11 F2S3 x FR992.FR1064 (EXG2)
ENTRY
YIELD
MOIS. % EP
B9527-01/97
168.7
19.3
88.1
Check mean
170.8
18.8
89.6
DK697
176.9
19.4
89.8
G8288
177.2
19.9
88.1
HC33.TR7322
144.3
16.6
90.5
LH200.LH262
168.7
19.3
89.0
P31G98
187.6
18.8
90.4
19 Env. CV:
11.2
8.1
13.8
The following data have many
fewer test environments, but are
for a 2nd tester. Seed available
now (maize_resources@ncsu.edu
or major@nc.rr.com).
DKXL380 N11 F2S2 x FR992.1064 (EX01)
ENTRY
YIELD MOIS. % EP
2423-011/99 143.0 19.9 92.3
2423-017/99 145.2 19.2 94.4
Check means 141.3 19.3 92.1
DK687
147.3 19.1 93.9
DK697
152.7 19.4 90.8
LH132.LH51 131.5 18.2 90.8
LH200.LH262 151.5 19.4 93.5
P3165
123.3 20.9 88.0
P32K61
143.4 18.5 95.7
9 Env. CV: 12.9
7.2 10.5
The remaining data are for 2nd
year trials from 2004. Seeds
have not yet been increased and
will not be available until Fall of
2005.
DK888 S11 F2S4s x FR615.FR697 (EXF2)
4018-001/00
165.7
21.3
81.4
Check mean
175.4
19.1
85.4
DK697
185.6
19.7
82.7
G8288
177.4
19.6
85.4
LH200.LH262
163.6
19.5
80.7
NK91-R9
178.0
21.3
88.0
P31G98
187.2
18.3
89.9
P32D99
197.1
20.4
82.6
P32K61
167.6
18.3
89.8
P32R25
167.2
18.4
82.8
21 Env. CV:
13.1
7.8
14.8
DK N11 F2S3s x FR992.FR1064 (EXG4)
3439-001/00 163.7
20.4
76.9 DK888
3483-005/00 162.5
20.9
79.3 XL380
Check mean 170.3
19.3
85.5
DK697
180.3
19.9
85.0
G8288
170.1
19.6
84.4
LH200.LH262 161.7
19.3
81.1
NK91-R9
173.4
21.2
87.2
P31G98
181.5
19.0
89.0
P32D99
187.5
20.5
83.1
P32K61
163.0
18.3
89.0
19 Env. CV: 11.3
6.7
13.4
Breeding-Cross Choices
In 2003 and 2004, we grew many 50%tropical Breeding Crosses in per-se yield trials.
Results were startling: Yield ranges were wide,
many yields were extremely low.
Conclusions: Many Breeding Crosses should be
junked, new crosses made or goals adjusted.
Some performed well:
1. PE11:S11a (BR51501)
2. CL-00331:N18
3. FS8B(S):S03
4. BR105:S16
5. DKB830:S19
6. FS8B(T):N11a
7. RN07:S20 (BR51721)
8. SE32:N11c (BR52051)
9. PASCO14:S11a
10. GUAT209:N11c
These were
generally within
10% of the checks.
Others performed abysmally:
1. CML325:N13
2. CHIS462:N08a
These ranged from
3. CML247:N17a
about 1/3 to 1/2 of
4. CML247:N18
check yields.
5. CUBA117:S15
6. CML247:N17b
7. SANM126:S12
8. DK888:S08a
9. FS8B(S):S17b
10. DKXL370:S08a
Yield trials of CML, KUI, and TZI lines, first with
a LH132.LH51 screen, followed by SS and NSS
testers, suggests the following lines as good
GEM candidates:
CML258
TZI9
TZI8
CML341
CML343
CML277
CML91
CML10
CML269
CML373
CML157Q
CML108
CML327
KUI43 was
best Ki
line tested.