"Evaluation of Yield And Fiber Trait Responses Across Irrigation Treatments"
-
Upload
gabriel-merritt -
Category
Documents
-
view
13 -
download
0
description
Transcript of "Evaluation of Yield And Fiber Trait Responses Across Irrigation Treatments"
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!