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ARS Home » Plains Area » Fargo, North Dakota » Edward T. Schafer Agricultural Research Center » Cereal Crops Research » Research » Publications at this Location » Publication #395648

Research Project: Improvement of Biotic Stress Resistance in Durum and Hard Red Spring Wheat Using Genetics and Genomics

Location: Cereal Crops Research

Title: Genetic and physical localization of a leaf rust susceptibility gene in barley

item LIU, RUIYING - North Dakota State University
item Nandety, Raja Sekhar
item ZHONG, SHAOBIN - North Dakota State University
item Yang, Shengming

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 7/8/2022
Publication Date: 8/6/2022
Citation: Liu, R., Nandety, R.S., Zhong, S., Yang, S. 2022. Genetic and physical localization of a leaf rust susceptibility gene in barley. Meeting abstract. Plant Health Conference 2022. Page 624.

Interpretive Summary:

Technical Abstract: Caused by the biotrophic fungal pathogen Puccinia hordei, leaf rust is one of the important foliar diseases in barley. Although a few dominant resistance genes to leaf rust have been identified and cloned in barley, resistance conferred by major genes has been frequently defeated by the pathogen. A recessive resistance was identified in a spring barley accession by using the VA90-34 isolate which is virulent to most of major resistance genes. To fine-map towards cloning of this recessive resistance (hereafter named Sph1, Susceptibility to P. hordei 1), we conducted genetic mapping with biparental populations in the present study. The Sph1 gene was anchored close to the telomere of the short arm of 3H, delimited within a 210 kb region. Of the six predicted genes in the Sph1 region, two genes encoding putative receptor-like kinase were selected for functional validation. Therefore, our study provides high-resolution genetic map and candidates of Sph1, paving foundation for cloning of this important gene.