Chromosomal location and genetic relationship of leaf rust resistance genes Rph9 and Rph12 in barley

Barley lines Hor 2596 and Triumph are the sources of leaf rust resistance genes Rph9 and Rph12, respectively. An allelism test was performed with F2 progeny of the cross Triumph/Hor 2596 inoculated with Puccinia hordei. No recombinants were found in a population of 3,858 progeny, indicating Rph9 and...

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Bibliographic Details
Published in:Phytopathology 1998-01, Vol.88 (1), p.76-80
Main Authors: Borovkova, I.G. (Monsanto, St Louis, MO.), Jin, Y, Steffenson, B.J
Format: Article
Language:English
Subjects:
AGENT PATHOGENE
Agronomy. Soil science and plant productions
ALLELES
Biological and medical sciences
CARTE GENETIQUE
CHROMOSOME MAPS
CULTIVARS
DISEASE RESISTANCE
ENFERMEDADES FUNGOSAS
Fundamental and applied biological sciences. Psychology
FUNGAL DISEASES
GENE
GENES
GENETIC MAPS
GENETIC MARKERS
GENETIC VARIATION
Genetics and breeding of economic plants
HORDEUM VULGARE
MALADIE FONGIQUE
MAPAS GENETICOS
MARCADORES GENETICOS
MARQUEUR GENETIQUE
ORGANISMOS PATOGENOS
PATHOGENICITY
PATHOGENS
PATOGENICIDAD
Pest resistance
Plant pathogens
POUVOIR PATHOGENE
PUCCINIA HORDEI
RESISTANCE AUX MALADIES
RESISTENCIA A LA ENFERMEDAD
VARIACION GENETICA
VARIATION GENETIQUE
VARIEDADES
Varietal selection. Specialized plant breeding, plant breeding aims
VARIETE
VARIETIES
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Summary:Barley lines Hor 2596 and Triumph are the sources of leaf rust resistance genes Rph9 and Rph12, respectively. An allelism test was performed with F2 progeny of the cross Triumph/Hor 2596 inoculated with Puccinia hordei. No recombinants were found in a population of 3,858 progeny, indicating Rph9 and Rph12 are alleles. Molecular and morphological markers were used to identify the chromosomal location of these genes in the crosses Bowman/Hor2596 and Triumph/I91-533-va. A linkage was detected between Rph9 and the flanking sequence-tagged site (STS) markers ABC155 and ABG3 on chromosome 7(5H) at a distance of 20.6 and 20.1 centimorgans (cM), respectively, and to the microsatellite marker dehydrin-9 (HVDHN9) at a distance of 10.2 cM in the Bowman/Hor 2596 cross. Analysis of isozymes in bulks of the same population showed that Rph9 may be closely linked to the Est9 locus on chromosome 7(5H). The Rph12 locus was linked to the morphological trait locus va (controlling variegated leaf color) on chromosome 7(5H) at a distance of 22.6 cM in the Triumph/I91-533-va cross. Rph12 also was linked with STS marker ABC155 (24.4 cM) and RAPD marker OPA19 (1.5) (17.8 cM). These data indicatethat Hor 2596 and Triumph carry a leaf rust resistance gene at the same locus on the long arm of chromosome 7(5H) of barley
ISSN:0031-949X
1943-7684
DOI:10.1094/PHYTO.1998.88.1.76