1. Reproducibility of check cultivar performance as affected by seed source by Jimmy X. Zumba and Gerald O. Myers Department of Agronomy and Environmental Management Louisiana State University, Baton Rouge, LA.

2. Conventional Vs. Transgenic Transgenic cotton 2006 2005 –AZ 86.93 % - AZ 82 % –CA 59.44 % - CA 43.5 % –LA 99.38 % - LA 95 % –MS 99.29 %- MS 95 % –TX 74.87 % - TX 63.5 % –USA 87.64 %- USA 82 % Conventional (Non-Transgenic) cotton in the US in 2006 –18 out of the 154 marketed Upland cotton varieties were conventional Most popular conventional varieties in LA –FM 958, FM 832, DP 493, DP 491, DP 393, ST 474

3. Who breeds for conventional varieties? –Mainly by public universities –Small effort by private companies Conventional breeding programs –Rudimentary seed processing –Different seed treatment (insecticide, fungicide) Conventional commercial checks –Unavailable (e.g. PSC 355) –Better seed processing? –Better seed treatments (insecticide, fungicide)? Conventional Vs. Transgenic

4. Reduction of the number of conventional (non- transgenic) varieties and their acreage planted, represents a growing problem for conventional cotton breeding programs if the benchmark check varieties become unavailable. Justification

5. Evaluate the purity and stability of performance of retained commercial seeds. Evaluate the seed selection and treatment of commercial checks in relation with retained commercial seeds Objective

6. 3 locations in 2006: Alexandria, Bossier City and Saint Joseph, LA. 2006 Advance Yield Trials (22 entries including checks) New DP 393, DP 493 and FM 958, and same retained varieties seeds from 2005 crop. Seed treatment (Baytan ® and Allegiance TM FL) RCBD with 2 rows 40 ft long plots Material and Methods

7. Seedcotton yield Lint Index Fiber characteristics: –Length –Strength –Micronaire –Elongation –Uniformity –Short Fiber Index Parameters measured

8. Seedcotton Yield and Lint Index NameLbs LA043070632661 LA043070662620 DP3932613 LA043070622553 LA043070042527 DP393 Retained2488 LA043070032441 DP493 Retained2409 LA004050332403 LA043070642376 DP4932374 FM958 Retained2374 LA043070612360 LA043070472334 LA043070272327 LA043070592297 LA043070152257 LA043070352232 LA043070652218 LA043070142213 LA043070542123 FM9582108 NameLbs DP3932613 a DP393 Retained2488 a DP493 Retained2409 a DP4932374 a FM958 Retained2373 ab FM9582107 b LocationLbs Alexandria2997 a Bossier City2169 b Saint Joseph1965 c LocationLint index (%) Alexandria39.5 a Bossier City40.1 a Saint Joseph40.5 a NAMELint index (%) DP49343.8 a DP493 Retained43.3 ab DP39341.7 ab FM958 Retained41.4 ab FM95840.0 b DP393 Retained37.3 b NameLbs "New"2365 a Retained2423 a NameLint index (%) "New"41.8 a Retained40.6 a

9. Fiber characteristic LocationLength (UHM) Alexandria1.195 a Bossier City1.123 b Saint Joseph1.102 c NameLength (UHM) FM9581.156 a FM958 Retained1.148 a DP3931.136 ab DP393 Retained1.121 bc DP493 Retained1.118 bc DP4931.111 c LocationStrength (GTEX) Alexandria34.9 a Bossier City31.1 b Saint Joseph30.1 c NameStrength (GTEX) DP39332.8 a DP393 Retained31.9 ab FM95831.5 ab FM958 Retained30.8 bc DP49330.6 bc DP493 Retained30.2 c LocationMIC Bossier City4.85 a Saint Joseph5.14 b Alexandria5.15 b NameMIC FM9584.9 a DP3934.9 a DP393 Retained4.9 a FM958 Retained5.0 ab DP493 Retained5.1 b DP4935.1 b NameLength (UHM) "New"1.134 a Retained1.129 a NameStrength (GTEX) "New"31.6 a Retained31.0 a NameMIC "New"5.0 a Retained5.0 a

10. Fiber characteristic LocationSFI (%) Alexandria3.1 a Bossier City5.3 b Saint Joseph5.7 c NameSFI (%) DP3934.0 a DP393 Retained4.6 ab FM9584.7 ab FM958 Retained5.3 bc DP493 Retained5.9 bc DP4936.1 c LocationElongation (%) Bossier City8.2 a Alexandria7.9 b Saint Joseph7.7 c NameElongation (%) DP3939.3 a DP393 Retained9.1 a DP4937.4 b DP493 Retained7.3 bc FM958 Retained7.0 c FM9586.9 c LocationUniformity (%) Alexandria85 a Bossier City83 b Saint Joseph82 c NameUniformity (%) DP39384.4 a FM95884.0 ab DP393 Retained83.9 ab FM958 Retained83.5 bc DP49383.5 bc DP493 Retained83.1 c NameSFI (%) "New"4.9 a Retained5.3 a NameElongation (%) "New"7.9 a Retained7.8 a NameUniformity (%) "New"84.0 A Retained83.5 B

11. Stability of performance is not lost when retaining commercial seed checks in one year The processing of retained seed was not affected in comparison with the commercial seeds Conclusion

12. Mr. Ivan Dickson (LSU Cotton Fiber Lab) Mr. David Caldwell (Red River Research Station) Mr. James Hayes (Red River Research Station) Mr. Brad Guillory (Dean Lee Research Station) Mr. Alfonso Coco (Northeast Research Station) Dr. Jack E. Jones Acknowledge