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Breeding for Phosphorus Use Efficiency in Wheat (Triticum aestivum L.)

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Title: Breeding for Phosphorus Use Efficiency in Wheat (Triticum aestivum L.)
Author: Gordon, Emily
Department: Department of Plant Agriculture
Program: Plant Agriculture
Advisor: Navabi, Alireza
Abstract: Improving phosphorus use efficiency (PUE) in wheat (Triticum aestivum L.) can reduce dependence on P fertilizer. The objectives of this research were to: 1) evaluate the genetic diversity in a population of synthetic hexaploid wheat derived lines (n=194); 2) identify genomic regions in wheat related to PUE, and 3) to assess the suitability of using this plant material in a breeding program. Three field trials were conducted under 0 kg ha-1 and 125 kg ha-1 monoammonium phosphate over two years. It was determined that significant variation exists in this population for P-related traits, root morphology and agronomic traits. Using 6 904 polymorphic SNP markers, 32 markers were identified for agronomic traits, three markers for average root diameter, and 7 markers for P-use related traits. Superior genotypes were identified that could be used as parents in wheat breeding programs for improved PUE.
Date: 2018-08
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