My research aims to determine agronomic, genetic, human, and social aspects of sustainably reducing wheat yield gaps. Agronomically, two projects address the management of nitrogen (N) fertilizer to increase winter wheat grain yield while maintaining (or increasing) grain protein concentration (GPC), including (i) late-season N application and (ii) in-season N by cultivar interactions. A third project is a statistical approach to determine seeding rates that maximize yield and reduce yield variability as dependent on yield-environment. A fourth project characterizes the genetic architecture of winter wheat traits that contribute to yield GxE. From the human and social components, I am conducting key informant and structured discussion analyses with major players across the wheat value chain to identify indicators and metrics needed for the development of sustainable bread.
Journal articles
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Romulo P. Lollato, Luiz O. Pradella, Nicolas Giordano,Luke P. Ryan, Luana M. Simao, Jorge A. Soler, Brent R. Jaenisch, Rick Horton,“Winter wheat response to plant density in yield contest fields,” Crop Science doi:
10.1002/csc2.21296Current seeding rate recommendations could be lowered / for intensively managed fields. -
Nicolas Giordano, Victor O. Sadras, Adrian A. Correndo and Romulo P. Lollato, “Cultivar-specific phenotypic plasticity of yield and grain protein concentration in response to nitrogen in winter wheat” Field Crops Research Vol 306, (Jan 2024): doi:
10.1016/j.fcr.2023.109202We propose a yield-protein plasticity framework / to assess G × N interactions. -
Nicolas Giordano, Victor O. Sadras and Romulo P. Lollato, “Late-season nitrogen application increases grain protein concentration and is neutral for yield in wheat. A global meta-analysis,” Field Crops Research Vol 220, no. S5 (Jan 2023): doi:
10.1016/j.fcr.2022.108740Greater grain protein concentration response / to late season N / is expected in high yielding environments.