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Rph23: a new designated additive adult plant resistance gene to leaf rust in barley on chromosome 7H


Singh, D and Dracatos, P and Derevnina, L and Zhou, M and Park, RF, Rph23: a new designated additive adult plant resistance gene to leaf rust in barley on chromosome 7H, Plant Breeding, 134, (1) pp. 62-69. ISSN 0179-9541 (2015) [Refereed Article]

Copyright Statement

Copyright 2014 Blackwell Verlag GmbH

DOI: doi:10.1111/pbr.12229


We report on a new adult plant resistance (APR) gene Rph23 conferring resistance to leaf rust in barley. The gene was identified and characterized from a doubled haploid population derived from an intercross between the Australian barley varieties Yerong (Y) and Franklin (F). Genetic analysis of adult plant field leaf rust scores of the Y/F population collected over three successive years indicated involvement of two highly additive genes controlling APR, one of which was named Rph23. The gene was mapped to chromosome 7HS positioned at a genetic distance 36.6 cM. Rph23 is closely linked to marker Ebmac0603, which is flanked by markers bPb-8660 and bPb-9601 with linkage distances of 0.8 and 5.1 cM, respectively. A PCR-based marker was optimized for marker-assisted selection of Rph23, and on the basis of this marker, the gene was postulated as being common in Australian and global barley germplasm. Pedigree and molecular marker analyses indicated that the six-rowed black Russian landrace ‘LV-Taganrog’ is the likely origin of Rph23.

Item Details

Item Type:Refereed Article
Keywords:barley, barley leaf rust, mapping, QTL, Rph23, additive genes
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Crop and pasture improvement (incl. selection and breeding)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Barley
UTAS Author:Zhou, M (Professor Meixue Zhou)
ID Code:97583
Year Published:2015
Web of Science® Times Cited:27
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2014-12-24
Last Modified:2017-11-06

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