LOGIN
|
REGISTER
Wednesday, October 9, 2024
Home
Summaries
Country Summary
Site of Action Summary
Site of Action Table
ALS Mutation Database
Graphs
Chronological Increase in USA
Saving Graphs for PowerPoint
Multiple Resistance within Populations
Weeds Resistant to Many SOA's
Global Maps
Chronological Increase
Resistance by Site of Action
Graph Data for Resistance by SOA
Resistance by SOA listing species
Resistance by SOA and Crop
Resistance by Weed Family
Weed Families by # SOA
Top 15 Weed Species by # SOA
Lifecycle Duration for Resistant Weeds vs Weeds in General
Top 15 Herbicides to Select Resistance
ALS inhibitor mutations
ALS inhibitor Mutations - Residue #
#Herbicides for each of the Top 15 SOA's
Recent Additions
Select Multiple Resistance by Country
Resistant Weeds
By Species
By Crop
By Country
By Herbicide Site of Action
By Individual Herbicide
Add New Case
Add New Case of Resistance
Criterion for Confirmation
Herbicides
Herbicide Classification System
Herbicides by Site of Action
Herbicide Poster
Researchers
Login
Log Out
Edit Your Contact Details
Find Researchers
Register as Researcher
Email me my Password
Change my Password
Literature
Search Reference Database
Add a Document
Add a Reference
E-Books
Herbicide Resistant Phalaris minor in Wheat - India
Management of Resistant Weeds in Rice
Prevención y manejo de malezas resistentes a herbicidas en arroz
Help
About US
FAQ
FAQ
Login
FAQ
About Us
Cite this Site
Add New Case
Add Documents
Summaries
US State Map
European Map
Recent Cases
Countries
Sites of Action
All Species by SOA Table
Herbicides
Glyphosate Resistant Weeds
ALS Mutation Database
Sequence Database
Graphs
Global Maps
Herbicide Poster
Herbicide Classification System
Resistant Weeds
By Site of Action
By Crop
By Species
By Country
By Individual Herbicide
Membership
Register
Retrieve Your Password
Edit Your Contact Details
Change Your Password
Contacts
Researchers
Contact Us
Search the Herbicide-Resistance Reference Database
Searches the reference database - authors, title, abstract, and keywords fields. Not case sensitive.
You can use
AND, OR, AND NOT
operators. For instance :
Tranel and Amaranthus and not glyphosate
REFERENCES
1
Page size:
select
5
10
20
50
Page:
of 1
Items
1
to
1
of
1
Werle, R., K. Begcy, M. K. Yerka, J. P. Mower, I. Dweikat, A. J. Jhala, and J. L. Lindquist
.
2017
.
Independent Evolution of Acetolactate Synthase–inhibiting Herbicide Resistance in Weedy Sorghum Populations across Common Geographic Regions.
.
Weed Science
65
:
164 - 176
.
Traditional breeding has been used to develop grain sorghum germplasm that is tolerant to acetolactate synthase (ALS)-inhibiting herbicides (Inzen Technology, DuPont). Inzen sorghum carries a double muta- tion in the ALS gene (Val560Ile and Trp574Leu), which confers high level of tolerance to ALS-inhibiting herbicides. Overreliance on ALS-inhibiting herbicides for weed control during the 1990s resulted in the evolution of ALS inhibitor–resistant shattercane populations in Nebraska. According to a survey con- ducted in 2013, ALS inhibitor–resistant weedy Sorghum populations persist in Nebraska. The objectives of this research were to determine whether the ALS mutations present in Inzen sorghum were present in the ALS inhibitor–resistant shattercane and johnsongrass populations detected in Nebraska and northern Kansas, and whether these populations evolved ALS resistance independently. Primers specific to the Val560 and Trp574 region of the ALS gene were used to screen the populations with PCR. The Trp574Leu mutation was present in one ALS inhibitor–resistant johnsongrass population. The Val560Ile was detected in three ALS inhibitor–resistant shattercane, one susceptible shattercane, one ALS inhibitor–resistant johnsongrass, and one susceptible johnsongrass population. Moreover, Val560Ile was present in resistant and/or susceptible individuals within johnsongrass and shattercane populations that were segregating for ALS resistance, indicating that by itself the Val560Ile mutation does not confer resis- tance to ALS-inhibiting herbicides. None of the populations presented both mutations simultaneously, as does Inzen sorghum. A shattercane population containing the Ser653Thr mutation was also detected. This research indicates that the ALS mutations present in Inzen sorghum already exist individually in weedy sorghum populations. Moreover, our results present strong evidence that ALS resistance in these populations evolved independently. Thus, widespread overreliance on ALS-inhibiting herbicides prior to adoption of glyphosate-tolerant crops in the 1990s exerted sufficient selective pressure on shattercane and johnsongrass populations for resistance to evolve multiple times in the Midwest. Finally, a survey of the 5′ portion of the ALS gene in more diverse wild and weedy Sorghum species was hampered by limited coverage in genomic resequencing surveys, suggesting that refined PCR-based methods will be needed to assess SNP variation in this gene region, which includes the Ala122, Pro197, and Ala205 codons known to confer ALS resistance in other species.
1
Page size:
select
5
10
20
50
Page:
of 1
Items
1
to
1
of
1
PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site.
Cite this site as:
Heap, I. The International Survey of Herbicide Resistant Weeds. Online. Internet.
Wednesday, October 9, 2024
. Available
www.weedscience.org
Copyright � 1993-
2024
WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.
{1}
##LOC[OK]##
{1}
##LOC[OK]##
##LOC[Cancel]##
{1}
##LOC[OK]##
##LOC[Cancel]##