An examination of fitness costs of glyphosate resistance in the common morning glory, Ipomoea purpurea.

ABSTRACT: Fitness costs are frequently invoked to explain the presence of genetic variation underlying plant defense across many types of damaging agents. Despite the expectation that costs of resistance are prevalent, however, they have been difficult to detect in nature. To examine the potential that resistance confers a fitness cost, we examined the survival and fitness of genetic lines of the common morning glory, Ipomoea purpurea, that diverged in the level of resistance to the herbicide glyphosate. We planted a large field experiment and assessed survival following herbicide application as well as fitness of the divergent selection lines in the absence of the herbicide. We found that genetic lines selected for increased resistance exhibited lower death compared to control and susceptibl

SUBMITTER: Debban CL 

PROVIDER: S-EPMC6102511 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature