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Table 2 Detailed results from six independent transformation experiments using the improved protocol.

From: High-throughput Agrobacterium-mediated barley transformation

Experiment

Construct

Embryo inoculation time

Number of embryos

Independent hygromycin-resistant plants

Transformation Efficiencya

A

pBract216

DA

75

20

26.7%

 

pBract215

DA

50

15

30.0%

  

SD

25

5

20.0%

 

pBract217

DA

50

16

32.0%

  

SD

25

5

20.0%

B

pBract216

DA

25

1

4.0%

  

SD

75

23

30.7%

 

pBract215

DA

25

8

32.0%

  

SD

75

22

29.3%

 

pBract217

DA

25

7

28.0%

  

SD

75

16

21.3%

C

pBract216

DA

50

9

18.0%

  

SD

75

20

26.7%

 

pBract215

DA

75

17

22.7%

  

SD

50

9

18.0%

 

pBract217

DA

75

24

32.0%

  

SD

50

16

32.0%

D

pBract216

SD

75

12

16.0%

 

pBract215

SD

75

22

29.3%

 

pBract217

SD

75

10

13.3%

E

pBract216

SD

100

17

17.0%

 

pBract215

SD

75

19

25.3%

 

pBract217

SD

75

14

18.7%

F

pBract216

DA

25

2

8.0%

  

SD

100

25

25.0%

 

pBract215

DA

50

18

36.0%

  

SD

75

22

29.3%

 

pBract217

DA

50

13

26.0%

  

SD

75

25

33.3%

Total

  

1750

432

24.7%

  1. DA = day after (embryos inoculated the day after isolation); SD = same day (embryos isolated and inoculated on the same day). aTransformation efficiency is given as the number of independent transformed lines yielding green, hygromycin resistant plants as a percentage of the number of immature embryos treated.