An incompletely dominant gene conferring resistance to Puccinia hordei, Rph14, identified previously in an accession of Hordeum vulgare, confers resistance to all known pathotypes of P. hordei in Australia. Knowledge of the chromosomal location of Rph14 and the identification of DNA markers closely linked to it will facilitate combining it with other important leaf rust resistance genes to achieve long lasting resistance. The inheritance of Rph14 was confirmed using 146 and 106 F(3) lines derived from the crosses 'Baudin'/'PI 584760' (Rph14) and 'Ricardo'/'PI 584760' (Rph14), respectively. Bulk segregant analysis on DNA from the parental genotypes and resistant and susceptible DNA bulks using DArT markers located Rph14 to the short arm of chromosome 2H. DArT marker bPb-1664 was identified as having the closest genetic association with Rph14. PCR based marker analysis identified a single SSR marker, Bmag692, linked closely to Rph14 at a map distance of 2.1 and 3.8 cm in the 'Baudin'/'PI 584760'and 'Ricardo'/'PI 584760' populations, respectively.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s00122-009-1132-0 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Virulence Dynamics of the Barley Leaf Rust Pathogen () in the United States from 1989 to 2020.
Plant Dis
December 2023
Department of Plant Pathology, University of Minnesota, St. Paul, MN, U.S.A.
Barley leaf rust, caused by , is an important disease of barley worldwide. The pathogen can develop new races that overcome resistance genes, emphasizing the need for monitoring its virulence. This study characterized 519 isolates collected in the United States from the 1989 to 2000 and 2010 to 2020 survey periods on 15 (Reaction to ) genes.
View Article and Find Full Text PDFA novel locus conferring resistance to maps to the genomic region corresponding to on barley chromosome 2HS.
Front Plant Sci
October 2022
School of Life and Environmental Sciences, Plant Breeding Institute, University of Sydney, Sydney, NSW, Australia.
Barley leaf rust (BLR), caused by is best controlled through genetic resistance. An efficient resistance breeding program prioritizes the need to identify, characterize, and map new sources of resistance as well as understanding the effectiveness, structure, and function of resistance genes. In this study, three mapping populations were developed by crossing Israelian barley lines "AGG-396," "AGG-397," and "AGG-403" (carrying unknown leaf rust resistance) with a susceptible variety "Gus" to characterize and map resistance.
View Article and Find Full Text PDFGenetic mapping of a new race specific resistance allele effective to Puccinia hordei at the Rph9/Rph12 locus on chromosome 5HL in barley.
BMC Plant Biol
December 2014
The University of Sydney, Plant Breeding Institute Cobbitty, Private Bag 4011, Narellan, 2567, NSW, Australia.
Article Synopsis
- Barley is widely grown for malt, feed, and human consumption but is susceptible to diseases like barley leaf rust, caused by Puccinia hordei.
- A resistance locus named RphCantala (RphC) was found in the 'Cantala' barley cultivar, showing moderate resistance to a specific pathotype of the rust fungus and confirming its monogenic inheritance.
- RphC is genetically independent from other known resistance genes and is an allele of Rph12 (now designated Rph9.am), with multiple Australian barley varieties sharing this resistance, likely originating from a Czechoslovakian landrace.
Molecular mapping of leaf rust resistance gene Rph14 in Hordeum vulgare.
Theor Appl Genet
November 2009
Plant Breeding Institute Cobbitty, University of Sydney, Private Mail Bag 11, Camden, NSW 2570, Australia.
An incompletely dominant gene conferring resistance to Puccinia hordei, Rph14, identified previously in an accession of Hordeum vulgare, confers resistance to all known pathotypes of P. hordei in Australia. Knowledge of the chromosomal location of Rph14 and the identification of DNA markers closely linked to it will facilitate combining it with other important leaf rust resistance genes to achieve long lasting resistance.
View Article and Find Full Text PDFPathogenic Specialization and Pathotype Distribution of Puccinia hordei in Australia, 1992 to 2001.
Plant Dis
November 2003
University of Sydney, Plant Breeding Institute Cobbitty, Private Mail Bag 11, Camden, NSW, 2570, Australia.
Annual surveys of pathogenic variability in the leaf rust pathogen of barley, Puccinia hordei, from 1992 to 2001 revealed a significant shift in the composition of populations across Austra-lia. Virulence for the resistance gene Rph12, first detected in a single pathotype, 4610P+, in Tasmania in 1991, was subsequently detected in 1993 in South Australia, Victoria, and southern New South Wales. By the end of 2001, eight pathotypes with virulence for Rph12 had been isolated, and virulence for this gene was present in all Australian barley growing regions.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!