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GrainGenes Reference Report: CRS-57-865

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Reference	CRS-57-865
Title	Novel Sources of Leaf Rust Resistance in Winter Wheat
Journal	Crop Science
Year	2017
Volume	57
Pages	865-876
Author	Li G [ Show all 6 ]
Abstract	Leaf rust is one of the most widespread diseases of wheat (Titicum aestivum L.), causing significant yield losses. More than 70 leaf rust resistance genes have been identified, but most of them have lost their effectiveness in the southern Great Plains of the United States. The objectives of this study were to evaluate leaf rust resistance of newly released wheat breeding lines and to identify novel resistance sources from a worldwide collection of landraces and historical cultivars. Results showed that only 4 out of 183 cultivars and breeding lines recently developed in the United States were highly resistant in the seedling stage to Pt2013, a bulk of Puccinia triticina Eriks. (Pt) races collected from multiple fields in Oklahoma in 2013, indicating the urgency of finding new resistance genes. We screened a set of 2171 accessions using Pt2013 and identified 26 landraces and 61 historical cultivars exhibiting high resistance. In addition, 159 landraces and 309 historical cultivars showed moderate resistance to Pt2013. These highly or moderately resistant accessions were further evaluated for their responses to another two Pt races predominant in Oklahoma in 2015, Pt52-2 and Pt54-1, and 25 of them showed high resistance to these two races and to the race composite. Another 66 and 53 accessions showed high resistance to one and two Pt races, respectively. Genetic diversity analysis using 5011 single-nucleotide polymorphism markers identified genetically diverse resistance sources. The resistance sources identified in this study may be valuable for breeding leaf rust resistance.
External Databases	https://dl.sciencesocieties.org/publications/cs/abstracts/57/2/865
Germplasm	Teremai Bugdai

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