1. 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.

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

3. 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

4. How Do Our Dominant Cotton Varieties Differ
Dominant Varieties in 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%

5. 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
***
35 transgenic varieties in 2016

6. 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
***
35 transgenic varieties in 2016

7. 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 * **
35 transgenic varieties in 2016

8. 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
35 transgenic varieties in 2016

9. 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)

10. 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 **
35 transgenic varieties in 2016

11. 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
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

12. 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.”