Geoffrey Morris on Muck Rack

Geoffrey Morris

As seen in: EurekAlert!, Science Magazine, Connecticut Post, Newswise, Middletown Press, Greenwich Time, New Haven Register, Register Citizen, The Norwalk Hour, SCIENMAG and
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Articles

Ancient pangenomic origins of noncanonical NLR genes underlying the recent evolutionary rescue of a staple crop

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By Mara Suleiman, Terry Felderhoff, Keren Duer-Milner, Yan Zhou, Daniil M Prigozhin, Carl VanGessel, Meihua Cui, Adam Healey, John Lovell, Vamsi Nalam, Marc T. Nishimura, Geoffrey Morris, Gael Pressoir
| Science Magazine
Abstract The recent adaptation of the cereal crop sorghum to a global aphid outbreak was a fortuitous case of evolutionary rescue, but the pangenomic and molecular basis is not known. We show that RMES1 disrupts phloem feeding via activation of conserved immunity networks, with a growth-to-defense transition mediated by phytohormone signaling and activated by nucleotide-binding site–leucine-rich repeat receptor (NLR) resistance genes on a structural variant.
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Interchromosomal Linkage Disequilibrium Analysis Reveals Strong Indications of Sign Epistasis in Wheat Breeding Families

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By Augusto Tessele, Geoffrey Morris, Eduard Akhunov, Blaine Johnson
| biorxiv.org
Abstract Additive gene action is assumed to underly quantitative traits, but the eventual poor performance of elite wheat lines as parents suggests that epistasis could be the underlying genetic architecture. Sign epistasis is characterized by alleles having either a beneficial or detrimental effect depending on the genetic background, which can result in elite lines that fail as parents in certain parental combinations.
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Loss of pleiotropic regulatory functions in Tannin1, the sorghum ortholog of Arabidopsis master regulator TTG1

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By Anthony Schuh, Geoffrey Morris
| biorxiv.org
Abstract Transcriptional master regulators are often targeted to improve plant traits, but antagonistic pleiotropic effects of these regulators can hamper this approach. The Myb-bHLH-WDR (MBW) complex is a broadly-conserved transcriptional regulator affecting pigmentation, biotic stress resistance, and abiotic stress tolerance.
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