| Abstract Detail
Darwins' reversals: What we now know about Feralization and Crop Wild Relatives Olsen, Kenneth [1], Wedger, Marshall [2], Burgos, Nilda [3]. Genomic insights on recent weedy rice evolution in the southern USA. Weedy rice (Oryza sp.) infests rice production areas in the United States and globally, severely reducing crop productivity and contaminating harvests. This aggressive agricultural weed has evolved multiple times independently around the world, primarily through feralization of local domesticated rice varieties. Weedy rice populations in the southern United States are an exception to this pattern, as the two predominant weed forms are descended from weeds that originated in southern Asia. Until recently, US weedy rice strains were largely reproductively isolated and genetically distinct from US crop cultivars. This changed dramatically in the last 20 years following the widespread adoption of herbicide-resistant rice technology, which has strongly selected for escape of resistance alleles into weedy rice populations. This presentation describes insights from WGS analyses of contemporary weed populations into the mechanisms by which crop-weed hybridization and other factors are now shaping the evolution and adaptation of US weedy rice. Genome scans reveal diverse patterns of selection favoring both crop and weed alleles throughout the contemporary weedy rice genome.
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1 - Washington University, Biology Dept., Campus Box 1137, 1 Brookings Drive, St. Louis, MO, 63130, United States
2 - Washington University In St. Louis, Biology, 1 Brookings Drive, St. Louis, MO, 63130, United States
3 - University of Arkansas, Department of Crop, Soil and Environmental Sciences, Fayetteville, AR, 72701, USA
Keywords:
de-domestication
agriculture
Whole genome re-sequencing
Oryza sativa
herbicide resistance
adaptation.
Presentation Type: Colloquium Presentations
Session: C03, Darwins' reversals: What we now know about Feralization and Crop Wild Relatives
Location: /
Date: Tuesday, July 20th, 2021
Time: 11:45 AM(EDT)
Number: C03008
Abstract ID:412
Candidate for Awards:None |
