DP 515 BG/RR A New Mid-Full Maturing Picker Variety With Bollgard & Roundup Ready Ken E. Lege’, Ph.D. Dir. of Technical Service East Region Piedmont, AL Curtis Williams, Ph.D. Senior Breeder Tifton, GA

DP 515 BG/RR (DPLX04Y170BR) Breeder: Dr. Curtis Williams, Tifton, GA Mid-Full maturity Semi-smooth leaves Tall, upright plant Bushy fruiting habit Excellent yield potential (yielded = DP 555 BG/RR) Very good fiber quality potential (better than DP 555 BG/RR) Storm tolerance: 4 (1=loose, 10=high plains type) Seed size (#/lb): (slightly larger vs. DP 555 BG/RR) Tested Beltwide in OVTs, ASTs in 2005 Introductory commercial quantities in 2006 Full commercial quantities expected for 2007 Characteristics

DP 515 BG/RR Breeding History 2000 – Original cross made at Scott, MS – F1 grown at Costa Rica 2001 – F2 bulk population grown at Tifton, GA; selected for apparent yield, maturity, lint percent & HVI 2002 – F2:3 progeny rows grown at Tifton, GA and sprayed OT with 4TL stage; row # 1134, later tested as DPLX04Y170BR, selected for maturity, apparent yield potential, lint percent & HVI 2003 – Replicated tests at 3 GA locations; seed increased at Scott, MS – Seed increased at Costa Rica 2004 – Tested at 14 replicated stage 4 locations beltwide; seed increased in AZ 2005 – Large-plot, on-farm testing and OVT testing beltwide 2006 – Continued large-scale testing and introductory commercial quantities

DP 515 BG/RR DP 143 B2RF Relative Difference in DD60s to reach 100% open* *based on D&PL Technical Services final plant map data compiled as of Relative Maturity Differences Beltwide DP 555 BG/RR DP 444 BG/RR DP 117 B2RF DP 164 B2RF DP 445 BG/RRDP 455 BG/RRDP 449 BG/RRDP 454 BG/RRDP 488 BG/RR DP 110 RF DP 147 RF DP 434 RR DP 432 RRDP 494 RR DP 167 RFDP 121 RF

66 on-farm locations Beltwide; ; Plant Ht (in) Total Nodes Fruit- ing Nodes Height: Node Ratio (in/inter- node) Node of 1st Fruit- ing Branch Node of Upper- most Cracked Boll Node of Upper- most Harvest- able Boll DD60s earlier vs DP 555 BG/RR DP 445 BG/RR DP 455 BG/RR DP 454 BG/RR DP 515 BG/RR DP 555 BG/RR LSD (0.05) NS0.6NS1.586 DP 515 BG/RR vs mid-full D&PL BG/RRs Plant Growth and Maturity Values within columns in blue font do not significantly differ from the highest value (underlined) at P<0.05.

DP 515 BG/RR Performance Vs. key D&PL BG/RRs –DP 555 BG/RR (#1 in 2006) –DP 444 BG/RR (#2 in 2006) –DP 445 BG/RR –DP 455 BG/RR –DP 454 BG/RR Vs. key competitor varieties *source: ‘Cotton Varieties Planted, 2006 Crop’, USDA-AMS

Cents/lb or Loan Value = $0.52/lb +/- premiums or discounts according to 2006 USDA Loan Chart; $/A = Yield x Loan; T test: NS = not significant; *** = significant at P <0.001 DP 515 BG/RR vs DP 555 BG/RR Beltwide data; all datasources (as of ) % Difference

DP 515 BG/RR vs DP 555 BG/RR All Data Sources (as of ) % Yield Difference N (+ = DP 515 BG/RR better) Regional Performance No significant differences, according to T tests West = SJV and AZ; High Plains = Northern and Southern HP

DP 515 BG/RR vs DP 444 BG/RR Beltwide data; all datasources (as of ) % Difference Cents/lb or Loan Value = $0.52/lb +/- premiums or discounts according to 2006 USDA Loan Chart; $/A = Yield x Loan; T test: NS = not significant; *** = significant at P <0.001

DP 515 BG/RR vs DP 444 BG/RR All Data Sources (as of ) % Yield Difference N (+ = DP 515 BG/RR better) Regional Performance * = significant at P< 0.05, according to T test; all other regional differences were not significant High Plains = Northern and Southern HP *

DP 515 BG/RR vs DP 445 BG/RR Beltwide data; all datasources (as of ) % Difference Cents/lb or Loan Value = $0.52/lb +/- premiums or discounts according to 2006 USDA Loan Chart; $/A = Yield x Loan; T test: NS = not significant; *** = significant at P <0.001

DP 515 BG/RR vs DP 445 BG/RR All Data Sources (as of ) % Yield Difference N (+ = DP 515 BG/RR better) Regional Performance * = significant at P< 0.05, according to T test; all other regional differences were not significant High Plains = Northern and Southern HP *

DP 515 BG/RR vs DP 455 BG/RR Beltwide data; all datasources (as of ) % Difference Cents/lb or Loan Value = $0.52/lb +/- premiums or discounts according to 2006 USDA Loan Chart; $/A = Yield x Loan; T test: NS = not significant; *, **, *** = significant at P <0.05, <0.01, and <0.001, respectively

DP 515 BG/RR vs DP 455 BG/RR All Data Sources (as of ) % Yield Difference N (+ = DP 515 BG/RR better) Regional Performance -10.6% * = significant at P< 0.05, according to T test; all other regional differences were not significant West = SJV and AZ; High Plains = Northern and Southern HP *

DP 515 BG/RR vs DP 454 BG/RR Beltwide data; all datasources (as of ) % Difference Cents/lb or Loan Value = $0.52/lb +/- premiums or discounts according to 2006 USDA Loan Chart; $/A = Yield x Loan; T test: NS = not significant; *** = significant at P<0.001

DP 515 BG/RR vs DP 454 BG/RR All Data Sources (as of ) % Yield Difference N (+ = DP 515 BG/RR better) Regional Performance No significant differences, according to T tests West = SJV and AZ; High Plains = Northern and Southern HP

DP 515 BG/RR vs DP 555 BG/RR and Competitors Cents/lb or Loan Value = $0.52/lb +/- premiums or discounts according to 2006 USDA Loan Chart; $/A = Yield x Loan; Values within columns in blue font do not significantly differ from the highest value (underlined) at P< G sold as brands DG2520B2RF, CG4020B2RF, ST4357B2RF, BW4630B2RF and Americot 1532 B2RF. Least square mean analysis; restricted to trials where >4 of these varieties were tested; Beltwide data; all datasources as of

Summary – DP 515 BG/RR Good companion to DP 555 BG/RR –Earlier maturity, but still mid-full –Slightly better seedling vigor –Less aggressive growth habit –Slightly better storm tolerance –Slightly better fiber quality potential –Equivalent yield potential Good yield performance vs. D&PL early- to mid-maturing varieties –DP 444 BG/RR, DP 445 BG/RR, DP 455 BG/RR & DP 454 BG/RR

Summary – DP 515 BG/RR cont’d Strong yield & fiber quality performance history –Midsouth/SE, and picker areas of TX –Best performance in southern tier Strong performance history against key competitor varieties