305-1 Water Use Efficiency and Transpiration of Cultivated Soybean Genotypes Under Field Environments.

Poster Number 714

See more from this Division: C02 Crop Physiology and Metabolism
See more from this Session: Crop Physiology and Metabolism: Posters

Tuesday, November 17, 2015
Minneapolis Convention Center, Exhibit Hall BC

Lin Li1, Hossein Zakeri2, Andrew Scaboo1 and Felix B. Fritschi1, (1)Division of Plant Sciences, University of Missouri, Columbia, MO
(2)California State University, Chico, CA
Abstract:
Drought is an important yield limiting factor for field crops worldwide.  Soybean is critical for oil and protein production in the United States as well as world-wide and is subject to significant yield losses in response to drought.  Yield in large part a function of both the amount of water taken up and the water use efficiency.  Therefore, yield under drought conditions may be maintained or increased by breeding for increased water use efficiency.  However, accurate and direct determination of water use efficiency under field conditions is very difficult.  In this study, cultivated and wild soybean genotypes contrasting for carbon isotope discrimination were grown in pots under field conditions to assess water use and water use efficiency based on a micro-lysimetric approach.  Our analyses revealed genotypic differences in water use efficiency, including genotypes with greater water use efficiency than commercial cultivars included in the experiment.  The genotypic differences in water use efficiency identified as part of this study will be leveraged for physiological and genetic studies as well as for breeding purposes.

See more from this Division: C02 Crop Physiology and Metabolism
See more from this Session: Crop Physiology and Metabolism: Posters

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