"Evaluation of Yield And Fiber Trait Responses Across Irrigation Treatments"

1. "Evaluation of Yield And Fiber Trait Responses Across Irrigation Treatments" Carol Mason Kelly

2. Objectives • 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.

3. Objectives • 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.

4. Experimental Design • 3- Randomized Complete Block Designs. • 4 replications • 3 Irrigation Levels: • .1 in./day, .2 in./day, .3 in./day • Drip irrigation

5. Experimental Design • 72 genotypes: • 60 Experimental & 12 Commercial • 2 Years of data: Yield and Fiber • (HVI & AFIS)

6. Important Dates 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

7. Things to Consider • Climatic Differences between years • Stability and the controversies • For this study - adaptability • Preliminary design of the study • Advantages • Limitations

8. Annual Rainfall

9. Cumulative Heat Units

10. Results

11. Production

12. Lint Yield

13. Trends

14. 1600 1400 1200 1000 Irrigation Treatment 800 600 High Medium Low 400 1 11 21 31 41 51 61 71 1 11 21 31 41 51 61 71 6 16 26 36 46 56 66 6 16 26 36 46 56 66 Lint Yield 2003 2004 Lbs. Entry Entry

15. 1600 1400 1200 Irrigation Treatment 1000 800 High Medium Low 600 400 200 4 10 22 27 31 65 67 71 4 10 22 27 31 65 67 71 Entry Entry Lint Yield 2003 2004 Lbs.

16. 1600 High Medium Low 1400 1200 1000 Irrigation Treatment Lbs. 800 600 High Medium Low 400 200 4 10 22 27 31 65 67 71 Entry 2003 Lint Yield Irrigation Treatment

17. 1600 1400 1200 1000 Irrigation Treatment Lbs. 800 600 High Medium Low 400 200 4 10 22 27 31 65 67 71 Entry 2004 Lint Yield

18. 5.5 5.0 4.5 4.0 3.5 3.0 High Medium Low Irrigation Treatment 2.5 2.0 4 10 22 27 31 65 67 71 4 10 22 27 31 65 67 71 Entry Entry Micronaire 2003 2004 Micronaire

19. 1.02 1.00 0.98 0.96 0.94 0.92 0.90 0.88 0.86 High Medium Low 0.84 Irrigation Treatment 0.82 0.80 0.78 4 10 22 27 31 65 67 71 4 10 22 27 31 65 67 71 Entry Entry Fiber Maturity 2003 2004 Maturity

20. 195 190 185 180 175 170 High Medium Low Irrigation Treatment 165 160 4 10 22 27 31 65 67 71 4 10 22 27 31 65 67 71 Entry Entry Standard Fineness 2003 2004 Hs

21. 1.35 1.30 1.25 1.20 1.15 1.10 High Medium Low Irrigation Treatment 1.05 1.00 4 10 22 27 31 65 67 71 4 10 22 27 31 65 67 71 Entry Entry Upper Half Mean Length 2003 2004 UHML

22. 1.05 1.00 0.95 0.90 0.85 High Medium Low Irrigation Treatment 0.80 0.75 4 10 22 27 31 65 67 71 4 10 22 27 31 65 67 71 Entry Entry Length (n) 2003 2004 LN

23. 26 24 22 20 18 16 14 High Medium Low 12 Irrigation Treatment 10 8 4 10 22 27 31 65 67 71 4 10 22 27 31 65 67 71 Entry Entry Short Fiber Content by number 2003 2004 SFC (n)

24. 38 36 34 32 30 28 High Medium Low 26 Irrigation Treatment 24 22 4 10 22 27 31 65 67 71 4 10 22 27 31 65 67 71 Entry Entry Strength 2003 2004 Strength

25. 9.0 8.5 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 High Medium Low 4.0 3.5 Irrigation Treatment 3.0 2.5 4 10 22 27 31 65 67 71 4 10 22 27 31 65 67 71 Entry Entry Elongation 2003 2004 Elongation

26. Conclusions • 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

27. Conclusions • Trends were somewhat unpredictable • Choosing an environment for selections is important yet EXTREMELY challenging • One single environment should not be used for selections.

28. Questions

29. If I were to do it again...... • 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!