How Do Our Dominant Cotton Varieties Differ University of Arkansas Fred Bourland, University of Arkansas All cotton varieties are winners, BUT may not be adapted to your specific environment! Specific adaptation due to subtle varietal differences. Primary focus on cotton varieties grown in Arkansas, similar to other Delta states.

How Do Our Dominant Cotton Varieties Differ Major Factors that Differ Transgenes Yield by location Maturity Yield components Pubescence Host plant resistance Fiber quality www.ArkansasVarietyTesting.com (results for all crops)

How Do Our Dominant Cotton Varieties Differ Transgenes in Arkansas Cotton Year B2RF B2XF LL-B2,G,T WRF Other 2010 88.0 - 9.0 3.0 2011 87.6 0.6 10.2 1.6 2012 68.5 15.8 12.5 3.2 2013 51.0 34.2 14.4 2014 23.4 70.9 5.7 2015 8.8 11.1 73.8 6.3 2016 0.4 55.7 20.2 22.8 1.0

How Do Our Dominant Cotton Varieties Differ Dominant Varieties in 2016 - Arkansas r 2016 (% ac) 2015 (% ac) 2014 (% ac) 2013 (% ac) 1 DP 1518 B2XF (29.9%) ST 4946 GLB2 (52.6%) ST 4946 GLB2 (48.1%) FM 1944 GLB2 (16.4%) 2 NG 3406 B2XF (18.0%) ST 4747 GLB2 (17.4%) FM 1944 GLB2 (15.2%) ST 5458 B2F (15.9%) 3 PHY 333 WRF (14.5%) PHY 333 WRF (4.65%) ST 5458 B2F (8.68%) DP 0912 B2RF (9.97%) 4 ST 4946 GLB2 (14.2%) DP 1518 B2XF (3.76%) DP 0912 B2RF (6.17%) PHY 499 WRF (9.02%) 5 PHY 312 WRF (8.3%) DP 1522 B2XF (3.76%) PHY 499 WRF (5.11%) ST 4145 LLB2 (6.92%) Sum = 84.9% Sum = 82.2% Sum = 83.3% Sum = 58.2%

How Do Our Dominant Cotton Varieties Differ Dominant Varieties in 2016 – Arkansas: Maturity Rk,ac Variety (% ac.) Plant Ht (in.) % Open bolls 1 DP 1518 B2XF (29.9%) 44.8 (17) 57 (21) 2 NG 3406 B2XF (18.0%) 40.6 (33) 68 (2) 3 PHY 333 WRF (14.5%) 46.1 (9) 62 (11) 4 ST 4946 GLB2 (14.2%) 42.5 (28) 62 (13) 5 PHY 312 WRF (8.3%) 46.1 (10) 64 (9) Variety x Location *** www.ArkansasVarietyTesting.com 35 transgenic varieties in 2016

How Do Our Dominant Cotton Varieties Differ Dominant Varieties in 2016 – Arkansas: Lint yield Rk,ac Variety (% ac.) Lint yield, All loc Man.,Sand Kei., Clay J. H., Vert. Mar., mid. Roh., s.Ark., lb/a (rank) Rank by location 1 DP 1518 B2XF (29.9%) 1220 (4) 24 31 2 6 NG 3406 B2XF (18.0%) 1059 (29) 32 25 17 26 27 3 PHY 333 WRF (14.5%) 1191 (9) 8 18 4 22 7 ST 4946 GLB2 (14.2%) 1203 (5) 15 12 5 PHY 312 WRF (8.3%) 1284 (1) Variety x Location *** www.ArkansasVarietyTesting.com 35 transgenic varieties in 2016

How Do Our Dominant Cotton Varieties Differ Dominant Varieties in 2016 – Arkansas: Yield components Rk Variety (% ac.) Lint yld L% SI LI SPA FPS Fden ac. lb/a (rk) Ranks 1 DP 1518 B2XF (29.9%) 1220 (4) 29 18 30 2 16 NG 3406 B2XF (18.0%) 1059 (29) 25 9 13 27 10 11 3 PHY 333 WRF (14.5%) 1191 (9) 7 14 5 4 ST 4946 GLB2 (14.2%) 1203 (5) 28 12 26 PHY 312 WRF (8.3%) 1284 (1) 6 Variety x Location *** ns * ** www.ArkansasVarietyTesting.com 35 transgenic varieties in 2016

How Do Our Dominant Cotton Varieties Differ Dominant Varieties in 2016 – Ark.: Host plant resistance Rk Variety (% ac.) Lint yld Lpub Spub Btri TPB BB ac. lb/a (rk) rate #/cm %dam %sus 1 DP 1518 B2XF (29.9%) 1220 (4) 3.3 6.0 59.0 35 (4) 2 NG 3406 B2XF (18.0%) 1059 (29) 1.5 4.9 52.7 37 (8) 49 3 PHY 333 WRF (14.5%) 1191 (9) 3.9 58.7 51 (28) 50 4 ST 4946 GLB2 (14.2%) 1203 (5) 3.2 4.5 55.2 30 (2) 55 5 PHY 312 WRF (8.3%) 1284 (1) 3.8 59.3 36 (7) 23 Variety x Location *** n/a www.ArkansasVarietyTesting.com 35 transgenic varieties in 2016

Fiber quality – less trash Less leaf pubescence on smooth-leaf & semi-smooth varieties If experience good leaf defoliation, most of trash in ginned cotton is bract tissue. Density of marginal bract trichomes varies among hairy and smooth leaf varieties. Visually rate leaf (& stem) pubescence using scale of 1 (smooth) to 9 (pilose)

How Do Our Dominant Cotton Varieties Differ Dominant Varieties in 2016 – Arkansas: Fiber quality Rk Variety (% ac.) Lint yield QS Mic Len UI Str Elo ac. lb/a (rk) in. % g/tex 1 DP 1518 B2XF (29.9%) 1220 (4) 72 4.3 1.22 86.8 30.5 6.5 2 NG 3406 B2XF (18.0%) 1059 (29) 54 4.5 1.16 85.9 30.4 7.8 3 PHY 333 WRF (14.5%) 1191 (9) 1.23 86.3 30.3 6.3 4 ST 4946 GLB2 (14.2%) 1203 (5) 59 4.8 1.19 86.0 33.3 6.7 5 PHY 312 WRF (8.3%) 1284 (1) 71 86.9 31.9 Variety x Location *** ns ** www.ArkansasVarietyTesting.com 35 transgenic varieties in 2016

Varieties Expressing Both High Yield and High Fiber Quality Variety Yield r QS Mic Len UI Str Elo 2016 Arkansas Transgenic Variety Test (35 entries) PHY 312 WRF 1284 1 71 8 4.5 29 1.22 10 86.9 5 31.9 9 6.3 30 PHY 444 WRF 1244 2 81 4.0 35 1.27 87.1 31.2 19 6.8 DP 1646 B2XF 1242 3 84 26 86.1 14 30.5 24 7.3 11 DP 1518 B2XF 1220 4 72 7 4.3 33 86.8 6 6.5 25 PHY 333 WRF 1191 34 1.23 86.3 30.3 28 BX 1737 GLT 1159 16 75 4.6 20 1.24 31.6 15 7.2 12 2016 Arkansas Conventional Variety Test (10 entries) Ark 0701-17 1098 68 86.4 32.6 6.4 SSG UA 222 1010 67 4.7 85.6 33.4 8.0 AM UA48 935 86 5.2 1.32 88.6 36.9 5.1 SSG UA 103 932 1.25 33.9 6.9

Cotton Breeding Dr. R.R. (Bob) Bridge (1939-1999): “Cotton breeding is like trying to get a bunch of monkeys up a tree. About the time you have all of them there, one will fall (or jump) out.”