Porous borders at the wild-crop interface promote weed adaptation in Southeast Asia

Lin-Feng Li, Tonapha Pusadee, Marshall J. Wedger, Ya-Ling Li, Ming-Rui Li, Yee-Ling Lau, Soo-Joo Yap, Sansanee Jamjod, Benjavan Rerkasem, Yan Hao, Beng-Kah Song () and Kenneth M. Olsen ()
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Lin-Feng Li: Sun Yat-sen University
Tonapha Pusadee: Chiang Mai University
Marshall J. Wedger: Washington University in St. Louis
Ya-Ling Li: Sun Yat-sen University
Ming-Rui Li: Sun Yat-sen University
Yee-Ling Lau: University Malaya
Soo-Joo Yap: Codon Genomics
Sansanee Jamjod: Chiang Mai University
Benjavan Rerkasem: Chiang Mai University
Yan Hao: Fudan University
Beng-Kah Song: Monash University Malaysia
Kenneth M. Olsen: Washington University in St. Louis

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract High reproductive compatibility between crops and their wild relatives can provide benefits for crop breeding but also poses risks for agricultural weed evolution. Weedy rice is a feral relative of rice that infests paddies and causes severe crop losses worldwide. In regions of tropical Asia where the wild progenitor of rice occurs, weedy rice could be influenced by hybridization with the wild species. Genomic analysis of this phenomenon has been very limited. Here we use whole genome sequence analyses of 217 wild, weedy and cultivated rice samples to show that wild rice hybridization has contributed substantially to the evolution of Southeast Asian weedy rice, with some strains acquiring weed-adaptive traits through introgression from the wild progenitor. Our study highlights how adaptive introgression from wild species can contribute to agricultural weed evolution, and it provides a case study of parallel evolution of weediness in independently-evolved strains of a weedy crop relative.

Date: 2024
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DOI: 10.1038/s41467-024-45447-0

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