Table 2 Occurrence and frequencies of imazamox-resistant plants and of tribenuron-resistant plants in the 31 populations from the targeted sampling (43 populations in total) where at least one resistant plant was detected by herbicide sensitivity bioassays.

From: A high diversity of mechanisms endows ALS-inhibiting herbicide resistance in the invasive common ragweed (Ambrosia artemisiifolia L.)

Population code

Imazamox

Tribenuron

% Resistant plants

% Resistant plants sequenced

Mutation detected

% Mutant, resistant plants

% Resistant plants

% Resistant plants sequenced

Mutation detected

% Mutant, resistant plants

ARA2

10

100

0

 

0

   

ARA3

3

100

Leu574

100

NA

   

NAQ4

3

100

0

 

0

   

OCC4

3

100

0

 

0

   

OCC5

3

100

Thr205

100

0

   

ARA4

0

   

15

50

0

 

CVL2

0

   

8

100

0

 

CVL3

0

   

5

50

0

 

CVL4

0

   

8

33

0

 

CVL5

0

   

13

100

0

 

NAQ10

0

   

10

100

Thr197

25

NAQ5

0

   

5

50

0

 

NAQ6

0

   

16

100

0

 

NAQ7

0

   

15

100

0

 

NAQ8

0

   

43

100

0

 

NAQ9

0

   

18

71

0

 

OCC6

0

   

5

100

0

 

OCC7

0

   

3

100

0

 

OCC8

0

   

3

0

NA

 

OCC9

NA

   

25

0

NA

 

ARA5

70

20

Val205

100

70

25

Val205

100

ARA6

5

100

Val205

100

33

77

Val205

33

ARA7

65

20

Val205

100

58

9

Val205

100

ARA8

3

100

0

 

15

100

0

 

NAQ11

3

100

0

 

03

100

0

 

NAQ12

3

100

0

 

10

100

0

 

NAQ13

3

100

Glu376

100

3

0

NA

 

OCC10

16

100

Thr205

100

5

0

NA

 

OCC11

3

100

0

 

5

100

Thr205

50

OCC12

5

100

0

 

5

100

0

 

OCC13

5

100

0

 

10

100

0

 
  1. Mutant ALS alleles were sought in resistant plants by Sanger sequencing. Populations are grouped according to the presence of resistance to imazamox only, to tribenuron only, or to both herbicides.
  2. NA not assayed.