UA Conventional Cotton VarietiesFred Bourland

• Interest in conventional cotton has increased due to: • Glyphosate resistant weeds (pigweed) • New budworm insecticides (Coragen, Belt)• Desire to reduce technology fee

No well-adapted conventional varieties were available.

Arkansas Agricultural Experiment Station released• ‘UA48’ in 2010• ‘UA103’ and ‘UA222’ in 2011

Yield and fiber quality of UA484 locations and 4 years (2007-10) of Strain Tests in Ark.

(UA 48, patent and PVP pending)

VarietyLint yield, lb/a Quality

scoreLength,

in.Micro-naire

Uniformity index (%)

Strength,g/tex

UA 48DP 393SG 105LSD0.10

116610871095ns

8857494

1.291.181.160.01

4.864.694.83ns

87.084.885.10.5

35.532.230.60.8

2-year (2009-10) mean lint yield of DP 393 over all locations was 10th out of 32 varieties in Ark. Cotton Variety Test; UA48 was 24 lb/a less than DP 393.

UA48ArkansasSilk

Yield component variables for UA484 locations and 4 years (2007-10) of Strain Tests in Ark.

(UA 48, patent and PVP pending)

VarietyLint fraction,

%Seed index, g/100 seed

Lint index, g/100 seed

Seed per ac, x 106

Fibers per seed

UA 48DP 393SG 105LSD0.10

37.840.839.50.8

12.310.410.90.2

7.67.47.30.2

6.6806.7056.776

ns

139771582715335

511

Other characteristics

• Earliest maturing variety in 2009 and 2010 Ark. Cotton Variety Test.• Leaf pubescence classed as “smooth-leaf”, equal to DP 393.• Stem pubescence and bract trichomes lower (smoother) than DP 393.• Resistant to bacterial blight and Fusarium wilt.• Tolerant to Verticillium wilt (highest relative yields at AR site with high wilt).• Relatively high “dirty flowers” in tarnished plant bug test.

*Based on these results and other performance data, AAES made agreement with West Gaines Delinting to increase seed in 2010.

• About 70 acre field near Whiteface, TX.• Very good production year for west Texas.• Lint yield = 2.2 bales/acre• Little or no field deterioration of seed.• Processed by West Gaines Delinting Company

2010 Seed Increase of UA48

Cotton Seed Quality Curve

2010 Seed Increase of UA48Resulting seed quality:• High warm germination, 80-90%• High tetrazolium test, over 90%• Low cold test germination, 35-45%

Treatment,min. in 65C HW

Germ%48 hr. @ 30C

Germ%62 hr. @ 30C

Germ% 108 hr. @ 30C

0 min. 60 78 905 min. 58 77 8515 min. 50 71 8225 min. 51 75 7935 min. 48 67 4945 min. 35 47 48

Hot water test – UA48 seed from 2010 TX increase

Attempts to break “hard dormancy”:• 85C for 2 minutes• Freezer for 1 and 2 weeks• Soak 15 and 30 minutes then dry • Tumble in metal mixer for 4 and 8 hours

Variety Dormant lot

Non- dormant lot

Dormant lot

Non-dormant lot

Germ% at 30C after 2 days Germ% at 30C after 7 daysAM 1532 B2RF 59 91 94 99NG 4111 RF 50 97 79 98NG 2051 B2RF 55 83 88 98

NG 4010 B2RF 68 96 98 99NB 4012 B2RF 57 96 94 100UA48 53 . 86 .AM 1550 B2RF ,VT . 93 . 97Mean 57 93 90 98

Germ. of dormant and non-dormant seed lotsAll seed produced 2010 in west TX

“Hard Dormancy” in CottonseedOccurs rarely, and is not variety specific.

Specific cause and way to break it are unknown.

Easily detected: high warm germ and TZ percentages, but low cool test results.

Dormant lots should be stored and retested until dormancy breaks – usually a few weeks BUT can persist for as long as 2 to 3 years.

Best to only sell seed from non-dormant lots/fields – WAS NOT an option for 2010 produced UA48 seed.

UA48, 2011 Ark. Variety Test, Keiser

2011 UA48 stands

UA48, 2011 Ark. Variety Test, Keiser

UA48, 2011 Manila production field

UA48, 2011 Manila production field

Yields (lb/a) of UA48 in Arkansas

Variety All loc. Keiser Judd Hill Marianna Rohwer

2011 seedcotton:UA 48 (TX seed)DP 393% DP393

96 plots25342687

94

24 plots1781*2475

72

24 plots27602575107

24 plots28083108

90

24 plots27872591108

2007-10 lint:UA 48 (AR/AZ)DP 393% DP393LSD0.10

384 plots11161087103ns

96 plots9841059

9356

96 plots1320113611646

96 plots1095113297ns

96 plots10631019104ns

Arkansas Strain Tests

*2011 seedcotton yield at Keiser with Ark produced seed: DP393 = 2522, UA48 = 2802

Variety All loc. Keiser Judd Hill Marianna Rohwer

2011 lint:UA 48 (TX seed)Mean (24 entries)

12 plots11191304

4 plots9871273

GlyphosateDrift?

4 plots10901329

4 plots12801264

Arkansas Cotton Variety Test

Yields of UA48 in 2011 Production Fields,Planted using 2010 TX grown seed

(Hearsay yields)

Location Lint yieldlb/a

Comparison to other varieties

Miss. Co., farm 1 Miss. Co., farm 1 – non-irrig.Miss. Co., farm 2St. Francis County Lonoke County, farm 1Lonoke County, farm 2Monroe CountyAshley County

Mississippi (state)

78039495096810007501200900

1200-1500

SimilarMuch less

Minus 100 lbn/a

Minus 100 lbMinus 150 lb

n/an/a

n/a

2011 Verification Field of UA48 in Phillips CountyYield = 600+ lb/aSuspected glyphosate drift

Performance of UA1034 locations and 4 years (2005-08) of Strain Tests in Ark.

(UA 103, patent pending)

VarietyLint yield, lb/a Quality

ScoreLength,

in.Micro-naire

Uniformity index (%)

Strength,g/tex

UA 103DP 393SG 105LSD0.10

125413301282ns

7662583

1.201.171.160.01

4.54.84.80.2

84.884.784.8ns

31.531.730.10.8

VarietyLint fraction,

%Seed index, g/100 seed

Lint index, g/100 seed

Seed per ac, x 106

Fibers per seed

UA 103DP 393SG 105LSD0.10

40.341.139.90.9

11.510.410.80.4

8.07.57.10.7

7.1048.0898.1150.575

176581620515393

746

UA103 is a smooth leaf, very early maturing okra-leaf variety. Best yields at Judd Hill and Rohwer, AR and in south TX.

Performance of UA2224 locations and 4 years (2008-10) of Strain Tests in Ark.

(UA 222, patent pending)

VarietyLint yield, lb/a Quality

ScoreLength,

in.Micro-naire

Uniformity index (%)

Strength,g/tex

UA 222DP 393SG 105LSD0.10

112710331003

93

7561545

1.231.191.170.01

4.44.64.80.1

85.284.784.00.4

31.932.130.30.8

VarietyLint fraction,

%Seed index, g/100 seed

Lint index, g/100 seed

Seed per ac, x 106

Fibers per seed

UA 222DP 393SG 105LSD0.10

40.440.339.50.8

11.010.611.00.4

7.77.37.30.4

6.6726.4166.244

ns

166571577715342

690

UA222 is a moderately hairy leaf, early maturing variety. Appears to be very widely adapted.

UA Conventional Cotton Varieties -Current Status

• UA48• Licensed to Americot (AM UA48)• 200 acre seed increase in 2011 • Conventional seed (non-dormant) will be available in 2012 • Introgression of transgenes initiated by Americot

• UA103• Licensed to Seed Source Genetics (SSG UA103)• 10 acre seed increase at Keiser in 2011• No plans for transgenic versions of UA103

• UA222 • Conventional licensed to Seed Source Genetics (SSG UA222) • 20 acre seed increase at Keiser in 2011• Transgenic option for UA222 in Cotton States program.