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Table 4 Quadratic model ANOVA and optimization for protoplast transfection efficiency

From: Optimization of isolation and transfection conditions of maize endosperm protoplasts

Source

Sum of squares

DF

Mean square

F-value

p-value

R-Square

Model

43,683,750

9

4,853,750

41.82,179

< 0.0001 S

0.9666

X1-Protoplast Conc.

8,769,727

1

8,769,727

75.56,336

< 0.0001

 

X2-Total Plasmid DNA

22,592.06

1

22,592.06

0.194662

0.666,314

 

X3-Endosperm Age

55,999.63

1

55,999.63

0.482514

0.499,513

 

X1X2

2.88

1

2.88

2.48E−05

0.996101

 

X1X3

5703.12

1

5703.12

0.04914

0.82801

 

X2X3

208,658

1

208658

1.797878

0.202929

 

X21

10,755,781

1

10,755,781

92.67597

< 0.0001

 

X22

12,379,165

1

12,379,165

106.6637

< 0.0001

 

X23

20,139,145

1

20,139,145

173.5267

< 0.0001

 

Residual

1,508,753

13

116,057.9

   

Lack of Fit

713,758.2

5

142,751.6

1.436,504

0.0385  NS

 

Pure Error

794,994.8

8

99,374.34

   

Corrected Total

45,192,503

22

    

Factor

Name

Optimal level

Experimental level range

  

Optimum

Lowest

Highest

  

Optimization for protoplast transfection efficiency

X1

Protoplast concentration (106/ml)

1.5

0.5

2.5

  

X2

Total plasmid DNA (µg)

10

5

15

  

X3

Endosperm Age (DAP)

8

6

10

  

Predicted response

Transfection efficiency (%)

Standard deviation

95% CI low

95% CI high

  
 

64.8

0.26

63

68.4

  
  1. N Significant, NS non-significant, SE standard error, CI confidence interval