Estimation of Cry3Bb1 resistance allele frequency in field populations of western corn rootworm using a genetic marker.

ABSTRACT: Following the discovery of western corn rootworm (WCR; Diabrotica virgifera virgifera) populations resistant to the Bacillus thuringiensis (Bt) protein Cry3Bb1, resistance was genetically mapped to a single locus on WCR chromosome 8 and linked SNP markers were shown to correlate with the frequency of resistance among field-collected populations from the US Corn Belt. The purpose of this paper is to further investigate the relationship between one of these resistance-linked markers and the causal resistance locus. Using data from laboratory bioassays and field experiments, we show that one allele of the resistance-linked marker increased in frequency in response to selection, but was not perfectly linked to the causal resistance allele. By coupling the response to selection data with a gene

SUBMITTER: Willse A 

PROVIDER: S-EPMC8022712 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature