Carol Mason Kelly

• To evaluate the lint yield and fiber quality of 72 different genotypes across three different irrigation levels • To examine any trends that might have occurred, either within an environment or across environments.

• To focus on the adaptability of genotype performance as it is affected by water availability.

•To gain valuable knowledge that can be used as groundwork for future studies with similar interests.

• 3- Randomized Complete Block Designs.

• 4 replications • 3 Irrigation Levels:

• .1 in./day, .2 in./day, .3 in./day •Drip irrigation

• 72 genotypes: • 60 Experimental & 12 Commercial

• 2 Years of data: Yield and Fiber (HVI & AFIS)

2003: Planted on May 19th

First Hard Freeze on November 23rd

(set record for latest)

Harvested December 18th – 21st

2004: Planted on May 27th

First Hard Freeze on November 3rd

Harvested December 20th & January 21st

• Climatic Differences between years • Stability and the controversies

• For this study - adaptability

• Preliminary design of the study• Advantages• Limitations

0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

Inch

es

2003

2004

Annual Rainfall

0

500

1000

1500

2000

2500

0 15 30 45 60 75 90 105 120 135 150 165 180 195 210

Days After Planting

Calc

ulat

ed H

eat U

nits

20032004

Cumulative Heat Units

2003 2004

Minimum 322 287

Maximum 1998 1311

Mean 1011 887

Std. Deviation 294 201

B-S heritability

high irrigation 0.62 0.79

medium irrigation 0.51 0.76

low irrigation 0.54 0.53

1

6

11

16

21

26

31

36

41

46

51

56

61

66

71400

600

800

1000

1200

1400

1600

1

6

11

16

21

26

31

36

41

46

51

56

61

66

71

2003 2004

Entry

HighMedium Low

Irrigation Treatment

Lb

s.

Entry

Lint Yield

Entry

4 10 22 27 31 65 67 71200

400

600

800

1000

1200

1400

1600

Entry

4 10 22 27 31 65 67 71

Lb

s.Lint Yield

2003 2004

HighMedium Low

Irrigation Treatment

HighMedium Low

Irrigation Treatment

2003 Lint Yield

HighMedium Low

Irrigation Treatment

4 10 22 27 31 65 67 71

Entry

200

400

600

800

1000

1200

1400

1600

Lb

s.

2004 Lint Yield

HighMedium Low

Irrigation Treatment

4 10 22 27 31 65 67 71

Entry

200

400

600

800

1000

1200

1400

1600

Lb

s.

2003 2004

Mic

rona

ireMicronaire

HighMedium Low

Irrigation Treatment

Entry

4 10 22 27 31 65 67 712.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

Entry

4 10 22 27 31 65 67 71

Entry

4 10 22 27 31 65 67 710.78

0.80

0.82

0.84

0.86

0.88

0.90

0.92

0.94

0.96

0.98

1.00

1.02

Entry

4 10 22 27 31 65 67 71

Mat

urity

Fiber Maturity2003 2004

HighMedium Low

Irrigation Treatment

Hs

Standard Fineness

Entry

4 10 22 27 31 65 67 71160

165

170

175

180

185

190

195

Entry

4 10 22 27 31 65 67 71

2003 2004

HighMedium Low

Irrigation Treatment

Entry

4 10 22 27 31 65 67 711.00

1.05

1.10

1.15

1.20

1.25

1.30

1.35

Entry

4 10 22 27 31 65 67 71

UH

ML

Upper Half Mean Length2003 2004

HighMedium Low

Irrigation Treatment

Entry

4 10 22 27 31 65 67 710.75

0.80

0.85

0.90

0.95

1.00

1.05

Entry

4 10 22 27 31 65 67 71

LNLength (n)

2003 2004

HighMedium Low

Irrigation Treatment

SF

C (

n)Short Fiber Content by number

Entry

4 10 22 27 31 65 67 718

10

12

14

16

18

20

22

24

26

Entry

4 10 22 27 31 65 67 71

2003 2004

HighMedium Low

Irrigation Treatment

Str

eng

thStrength

Entry

4 10 22 27 31 65 67 7122

24

26

28

30

32

34

36

38

Entry

4 10 22 27 31 65 67 71

2003 2004

HighMedium Low

Irrigation Treatment

Entry

4 10 22 27 31 65 67 712.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

Entry

4 10 22 27 31 65 67 71

Elo

nga

tionElongation

2003 2004

HighMedium Low

Irrigation Treatment

• There are strong interactions between genotypes and the environment

• Environmental affect varied among genotypes

• The presence of such a strong interaction should be accounted for in breeding programs

• Trends were somewhat unpredictable

• Choosing an environment for selections is important yet EXTREMELY challenging

•One single environment should not be used for selections.

• Base irrigation levels on estimated ETs• 25%, 50%, and 75%

• Fewer number of entries•20 - 30

• More than one location• at least 2 maybe 3

• Included a rain fed treatment•having a dry-land component would be very beneficial

• Expect the Unexpected!