Mutations in the acetolactate synthase (ALS) enzyme affect shattercane (Sorghum bicolor) response to ALS-inhibiting herbicides

Table 3 Shattercane injury estimated visually 21 d after treatment (DAT) in response to ALS-inhibiting herbicides applied at labeled rates. High numbers indicate greater reduction in growth, discoloration, or growth deformation. The Run x herbicide x population and the herbicide x population interactions were significant (p = 0.001), so data were analyzed analyzed by herbicide for each run. Each value represents the mean of four replications. The wild type is a susceptible sorghum line Ck60

Herbicide	Run	P2-205		P9-102		P8-30		Wild type
Imazamox	1	75	c	98	b	0^a	d	100	a
Imazamox	2	70	d	80	c	0^a	e	100	a
Imazaquin	1	60	b	70	a	0^a	c	60	b
Imazaquin	2	63	ab	55	b	0^a	c	71	a
Imazethapyr	1	71	c	93	b	0^a	d	100	a
Imazethapyr	2	70	b	74	b	0^a	c	92	a
Bispyribac	1	100	a	98	a	32	b	100	a
Bispyribac	2	77	c	65	d	30	e	99	a
Chlorsulfuron	1	0^a	d	10^a	c	0^a	d	65	b
Chlorsulfuron	2	0^a	c	0^a	c	0^a	c	23	b
Foramsulfuron	1	46	b	0^a	c	0^a	c	95	a
^aForamsulfuron	2	45	c	0^a	d	0^a	d	93	a
Nicosulfuron	1	99	a	0^a	b	0^a	b	99	a
Nicosulfuron	2	93	b	0^a	c	0^a	c	97	a
Primisulfuron	1	55	b	48	c	3^a	d	100	a
Primisulfuron	2	48	b	45	b	0^a	c	100	a
Rimsulfuron	1	100	a	100	a	50	b	100	a
Rimsulfuron	2	85	b	91	ab	58	c	100	a
Propoxycarbazone	1	5^a	b	0^a	b	3^a	b	58	a
Propoxycarbazone	2	0^a	c	0*	c	0^a	c	30	b
Thiencarbazone	1	66	b	70	b	0^a	c	100	a
Thiencarbazone	2	70	c	60	d	0^a	e	100	a
Penoxsulam	1	3	a	0	a	1	a	0	a
Penoxsulam	2	0	a	0	a	0	a	2	a
Glyphosate	1	100	a	100	a	100	a	100	a
Glyphosate	2	100	a	100	a	100	a	100	a

Highlighted values represent partial resistance relative to the wild type in both runs of the experiment
^arepresent resistance to the herbicide mode of action

ISSN: 1601-5223