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Detection of locally adapted genomic regions in wild rice (Oryza rufipogon) using environmental association analysis.
G3 : Genes - Genomes - Genetics 2023 August 25
Oryza rufipogon is the wild progenitor of cultivated rice O. sativa and exhibits high levels of genetic diversity across its distribution, making it a useful resource for the identification of abiotic stress tolerant varieties and genes that could limit future climate-changed induced yield losses. To investigate local adaptation in O. rufipogon, we analyzed single nucleotide polymorphism (SNP) data from a panel of 286 samples located across a diverse range of climates. Environmental association analysis (EAA), a genome wide association study (GWAS)-based method, was used and revealed 15 regions of the genome significantly associated with various climate factors. Genes within these environmentally associated regions have putative functions in abiotic stress response, phytohormone signaling and the control of flowering time. This provides an insight into potential local adaptation in O. rufipogon and reveals possible locally adaptive genes that may provide opportunities for breeding novel rice varieties with climate change-resilient phenotypes.
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