Table 4 Minimum isolation distance of maize plots in 2017–2018 for different safety thresholds.

From: A new isolation device for shortening gene flow distance in small-scale transgenic maize breeding

Different areas

Directiona

NE

N

NW

W

SW

S

SE

E

Safe threshold value, 1%b

Control area D

1

3

3

10

3

1

1

1

Isolated area A

1

1

1

1

1

1

1

1

Isolated area B

1

1

1

1

1

1

1

1

Isolated area C

1

1

1

1

1

1

1

1

Safe threshold value, 0.1%c

Control area D

1

10

15

n.d

10

10

1

3

Isolated area A

1

1

1

1

1

1

1

1

Isolated area B

1

1

1

1

1

1

1

1

Isolated area C

1

1

1

1

1

1

1

1

  1. n.d. not determined.
  2. aMinimum isolation distance of maize pollen in eight different directions. Positions of distances A1–D8 are shown in Fig. 1.
  3. bThe minimum isolation distance required by control area D and three isolation areas (A, B and C) when the gene flow rate reached a safety threshold of 1% in eight different directions. The units of numbers in the table are meters.
  4. cThe minimum isolation distance required by control area D and three isolation areas (A, B and C) when the gene flow rate reached a safety threshold of 0.1% in eight different directions. The units of numbers in the table are meters.
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