Cost-effective detection of genome-wide signatures for 2,4-D herbicide resistance adaptation in red clover.

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ID: 72975
2019
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Abstract
Herbicide resistance is a recurrent evolutionary event that has been reported across many species and for all major herbicide modes of action. The synthetic auxinic herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) has been widely used since the 1940s, however the genetic variation underlying naturally evolving resistance remains largely unknown. In this study, we used populations of the forage legume crop red clover (Trifolium pratense L.) that were recurrently selected for 2,4-D resistance to detect genome-wide signatures of adaptation. Four susceptible and six derived resistant populations were sequenced using a less costly approach by combining targeted sequencing (Capture-Seq) with pooled individuals (Pool-Seq). Genomic signatures of selection were identified using: (i) pairwise allele frequency differences; (ii) genome scan for overly differentiated loci; and (iii) genome-wide association. Fifty significant SNPs were consistently detected, most located in a single chromosome, which can be useful for marker assisted selection. Additionally, we searched for candidate genes at these genomic regions to gain insights into potential molecular mechanisms underlying 2,4-D resistance. Among the predicted functions of candidate genes, we found some related to the auxin metabolism, response to oxidative stress, and detoxification, which are also promising for further functional validation studies.
Reference Key
benevenuto2019costeffectivescientific Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Benevenuto, Juliana;Bhakta, Mehul;Lohr, Daniel A;Ferrão, Luís Felipe V;Resende, Marcio F R;Kirst, Matias;Quesenberry, Kenneth;Munoz, Patricio;
Journal Scientific reports
Year 2019
DOI
10.1038/s41598-019-55676-9
URL
Keywords
aptamer surface plasmon resonance (spr) cereal samples attenuated internal reflection spectroscopic ellipsometry (air-se) zearalenone (zen)

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