The population genomics of Conyza spp. in soybean macroregions suggest the spread of herbicide resistance through intraspecific and interspecific gene flow.

ABSTRACT: Herbicide-resistant Conyza spp. are a threat to many crops. These widespread weeds are closely related species and often cooccur. To characterize the origins of their resistance and the mechanisms underlying their spread, we assessed the genomic variation in glyphosate-resistant Conyza spp. in Brazil. Twenty populations were sampled from soybean fields across four macroregions (MRSs). A genotyping-by-sequencing study resulted in 2,998 single-nucleotide polymorphisms (SNPs) obtained for C. bonariensis (L.) and the closely related C. sumatrensis (Retz) E. Walker. Higher genomic diversity (π) and heterozygosity (H_O/H_E) and lower inbreeding coefficient (F_IS) values were detected in populations of Conyza spp. from MRS 1 (southern) than in those from other MRSs.

SUBMITTER: Kalsing A 

PROVIDER: S-EPMC11341714 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature