1. 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

2. 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 PLOTS22,234

3. 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).

4. 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

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

6. 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

7. 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).

8. 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

9. 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.

10. 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

11. 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

12. 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.

13. Some performed well: 1. PE11:S11a (BR51501) These were 2. CL-00331:N18 generally within 3. FS8B(S):S03 10% of the checks. 4. BR105:S16 5. DKB830:S19 6. FS8B(T):N11a 7. RN07:S20 (BR51721) 8. SE32:N11c (BR52051) 9. PASCO14:S11a 10. GUAT209:N11c

14. 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

15. 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: CML258CML91CML327 TZI9CML10 TZI8CML269 CML341CML373KUI43 was CML343CML157Qbest Ki CML277CML108line tested.