Resistance to Als-Inhibiting Herbicides in Common Ragweed, Foxtail and Horseweed

Based on the results and mechanisms identified from the above three weeds, PCR-based molecular markers have been used in this study to investigate the evolution of cloransulam resistance in common ragweed, which appeared in the same year as cloransulam was commercialized. The results revealed that resistance to cloransulam in common ragweed evolved in response to selection by ALS inhibitors other than cloransulam. Also, resistance-conferring ALS alleles were used to develop a marker to assess the genotype of horseweed at codons encoding amino acid position 197. In this way we have found an effective approach to confirm the hybridization of horseweed biotypes by applying a PCR-based molecular marker. This marker is being used in ongoing studies to investigate the inheritance of glyphosate resistance in horseweed.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Biology

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Zheng, Danman

Contributors dc:contributor

• Tranel, Patrick J.

• Biology, Plant Physiology

Language dc:language

eng

Identifier

(MiAaPQ)AAI3301259

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/85376