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Physiological and genetic investigation of spring wheat cultivar pavon 76 genotypes under limited-water condition

Dante Fortin Placido, University of Nebraska - Lincoln

Abstract

Wheat is an important crop for a large part of the world's human population. Abiotic stresses such as drought have caused about 25% yield loss in wheat. Given the heavy losses, major efforts are needed to understand the adaptation and tolerance of wheat to drought stress. Since the climatic effects on agricultural productivity are likely to threaten global food security, there is renewed effort to improve and sustain crop yields in drought environment. One critical element of yields under drought prone environment is to focus on the roots. In response to this serious agricultural challenge, many in the scientific community are spending their time and energy in finding ways to improving the crop yield grown in drought environment by looking at roots. Studying roots is of critical because roots function in water and nutrient acquisition for the plant. ^ This thesis project will increase our knowledge of RSA modification in response to limited water treatment on the developmental, physiological and genetic level. This will be useful for eventual generation of drought tolerant wheat cultivars. The purpose of this research is to study the genetic determinants involved in wheat root response to drought condition. The specific aims of my thesis project are: (1) To use morphological observations and physiological measurements to assess the Triticum aestivum-Agropyron elongatum translocation genotype (TL) performance and explain wheat TL's in response to limited water condition; (2) To employ next generation sequencing technology to identify and isolate novel candidate gene(s) that result in better wheat adaptation to drought, in general. The findings in this thesis will elucidate how TL deals with imposed moderate drought stress. The contribution of hormone gibberellic acid (GA) and the gene isolated from the TL, Lateral Root Density7 (LRD7), will also be discussed. ^

Subject Area

Agriculture, Agronomy

Recommended Citation

Placido, Dante Fortin, "Physiological and genetic investigation of spring wheat cultivar pavon 76 genotypes under limited-water condition" (2014). ETD collection for University of Nebraska - Lincoln. AAI3643800.
http://digitalcommons.unl.edu/dissertations/AAI3643800

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