Development of a small peanut evaluation panel to identify physiological and yield traits for drought tolerance

Authors: Dang, Phat; Lamb, Marshall; SANZ-SAEZ, ALVARO - Auburn University; CHEN, CHARLES - Auburn University

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 5/8/2023
Publication Date: N/A
Citation: N/A

Interpretive Summary: Abstract Only

Technical Abstract: Drought is an important abiotic stress in peanut that can significantly reduce yield depending on the duration and severity. Plants respond to drought stress by modulating plant physical characteristics, physiology, biochemistry, and gene expression to maintain homeostasis for survival and may have limited productivity. Progress in the development of drought tolerant peanut lines has been difficult due to the multi-allelic affect and variable environmental factors. Yield trait is complex since it represents a composite of all the interactions of biotic and abiotic components and can significantly varied depending on year and location. A small peanut evaluation panel of 12 genotypes have been assembled based on previous studies indicating the potential drought tolerance, middle tolerance, and susceptibility to targeted progressive drought challenge. Among these, C76-16 is a tolerant check and AP-3 is a consistent susceptible line. AU-NPL 17, a peanut variety released in 2017, was included since it demonstrated a potentially different drought tolerant mechanism than other lines. Evidence of drought plant response based on physiological traits and yield will be discussed for various peanut lines. This select peanut panel will be evaluated further in physiological and genetic studies to associate specific physiological traits to gene expression and/or genetic alleles for molecular breeding applications. This research will facilitate the development of drought tolerant peanut varieties.