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Agronomy 2018, 8(8), 133;

Mapping Quantitative Trait Loci for Agronomic Traits in Winter Wheat under Different Soil Moisture Levels

Faculty of Agriculture, Alexandria University, 23714 Alexandria, Egypt
Department of Soil & Crop Sciences, CD 1170, Colorado State University, Fort Collins, CO 80523, USA
Author to whom correspondence should be addressed.
Received: 1 July 2018 / Revised: 23 July 2018 / Accepted: 29 July 2018 / Published: 31 July 2018
(This article belongs to the Special Issue Quantitative Trait Locus Mapping for Crop Plants)
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Due to variable moisture conditions in the U.S. Great Plains, it is important to understand genetic control of crop traits under a range of soil moisture levels. Our objective was to identify quantitative trait loci (QTL) for yield, phenology, and morphological traits in wheat (Triticum aestivum L.) under different soil moisture conditions. Field evaluation of a winter wheat doubled haploid population (n = 185) derived from a cross between CO940610 and ‘Platte’ was carried out in Fort Collins and Greeley, Colorado, USA in 2007–2008 and 2008–2009, respectively. At each location, trials were grown under moderate drought stress and fully irrigated conditions. A total of 33 QTL for 11 traits was detected in two or more environments. A cluster of QTL for nine traits was found on chromosome 2B in the vicinity of the photoperiod response gene Ppd-B1. Other stable QTL clusters were detected on chromosome 6A and near the vernalization response gene Vrn-D3 on chromosome 7D. A QTL for grain yield on chromosome 5A was detected in three environments. With minor exceptions, the large-effect QTL were detected in both the water limited and fully irrigated environments, rather than being detected only under specific moisture levels. View Full-Text
Keywords: wheat; QTL; yield; water stress; drought stress wheat; QTL; yield; water stress; drought stress

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El-Feki, W.M.; Byrne, P.F.; Reid, S.D.; Haley, S.D. Mapping Quantitative Trait Loci for Agronomic Traits in Winter Wheat under Different Soil Moisture Levels. Agronomy 2018, 8, 133.

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