Table II.
Herbicide sensitivity of and codon present at position 2,041 on each copy of the gene encoding chloroplastic ACCase in A. myosuroides and L. rigidum seedlings from field populations
| A. myosuroides | Genotypesa | CHD herbicides
|
APP herbicides
|
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cycloxydim | Clethodim | Fenoxaprop | Clodinafop | Haloxyfop | |||||||
| Rb | Sb | R | S | R | S | R | S | R | S | ||
| 00-017c | Ile/Ile | 0 | 50 | 0 | 50 | 0 | 50 | 0 | 50 | 0 | 50 |
| 02-F1c, d | Asn/Asn | 0 | 50 | 0 | 50 | 50 | 0 | 50 | 0 | 50 | 0 |
| Total of seven populations from the fielde | Ile/Ile | 7 | 196 | 5 | 197 | 81 | 123 | 25 | 179 | 10 | 190 |
| Ile/Asn | 4 | 69 | 11 | 72 | 76 | 0 | 76 | 0 | 71 | 0 | |
| Asn/Asn | 4
|
70
|
4
|
61
|
70
|
0
|
70
|
0
|
79
|
0
|
|
| L. rigidum | Cycloxydim | Diclofop | Clodinafop | Haloxyfop | |||||||
| Rb | Sb | R | S | R | S | R | S | ||||
| Total of two populations from the fielde | Ile/Ile | 0 | 45 | 0 | 65 | 0 | 52 | 0 | 53 | ||
| Ile/Asn | 0 | 14 | 7 | 0 | 2 | 0 | 6 | 0 | |||
| Asn/Asn | 0 | 6 | 3 | 0 | 11 | 0 | 8 | 0 | |||
| Ile/Val | 0 | 5 | 0 | 0 | 1 | 4 | 3 | 0 | |||
a
X/Z, plants containing chloroplastic ACCase copies with an X and a Z codon at position 2,041. b S, Sensitive; R, resistant. c Populations used for ACCase enzyme assay. d “Purified” population (see “Materials and Methods”). e The results from several populations from the field were pooled together.