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\begin{document}

\title{Global Diversity of Source-Sink Senescence in Maize}



\author[1]{Mark Gee}%
\author[1]{Mitchell Tuinstra}%
\affil[1]{Affiliation not available}%


\vspace{-1em}



  
  \date{May 23, 2024}


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\begin{abstract}
Source-Sink Regulated Senescence (SSRS) in maize is a complex trait
involving sugar sensing and carbohydrate partitioning. While the yield
effects of SSRS are still under investigation, mapping work in Midwest
commercial germplasm has found evidence for QTL on several chromosomes.
In this study, we seek to understand the variation of this trait in
global maize germplasm and map the genetic loci linked to this
senescence response using the Maize Nested Association Mapping
population. Wide variation was seen in expression of the senescence
phenotype including several lines that are potentially anti-senescent in
response to sink removal. Phenotypes of NAM RIL populations support the
possibility of anti-senescent or senescence suppressing genetic factors.
Joint linkage mapping identified QTL for the SSRS trait on three
chromosomes which are distinct from those previously reported. By
understanding and mapping the global diversity of this trait, we can
better understand the physiology of maize senescence and integrate
insights into breeding programs.%
\end{abstract}%



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\emph{\textbf{Mark Gee\textsuperscript{1}} and Mitchell
Tuinstra\textsuperscript{1}}

\emph{\textsuperscript{\textbf{1}}Department of Agronomy, Purdue
University, West Lafayette, IN, USA}

\textbf{ORCiD:} 0000-0003-1472-0028

\textbf{Keywords:} Senescence, Maize, Global Diversity, Nested
Association Mapping

NOTE: This abstract is for a poster.

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