novel barley scald resistance gene: genetic mapping of the Rrs15 scald resistance gene derived from wild barley, Hordeum vulgare ssp. spontaneum

Most genes for resistance to barley leaf scald map either to the Rrs1 locus on the long arm of chromosome 3H, or the Rrs2 locus on the short arm of chromosome 7H. Other loci containing scald resistance genes have previously been identified using lines derived from wild barley, Hordeum vulgare ssp. s...

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Veröffentlicht in:Plant breeding Jg. 124; H. 2; S. 137 - 141
Hauptverfasser: Genger, R.K, Nesbitt, K, Brown, A.H.D, Abbott, D.C, Burdon, J.J
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Oxford, UK Blackwell Publishing Ltd 01.04.2005
Blackwell
Schlagworte:
Acp2
Agronomy. Soil science and plant productions
backcrossing
barley
Biological and medical sciences
chromosome mapping
cleaved amplified polymorphic sequence
disease resistance
dominant genes
Fundamental and applied biological sciences. Psychology
genes
genetic markers
Genetics and breeding of economic plants
Hordeum vulgare
Hordeum vulgare ssp. spontaneum
Hordeum vulgare subsp. spontaneum
interspecific hybridization
isozyme
microsatellite
microsatellite repeats
plant pathogenic fungi
random amplified polymorphic DNA technique
resistance genes
restriction fragment length polymorphism
Rhynchosporium secalis
Rrs15 gene
scald diseases
Varietal selection. Specialized plant breeding, plant breeding aims
wild relatives
Genetic mapping
Barley
Monocotyledones
Rhynchosporium secalis
Plant pathogen
Hordeum vulgare
Isozyme
Scald
Genetic determinism
Cereal crop
Fungi
Resistance
Hordeum vulgare ssp. spontaneum
Gramineae
Microsatellite DNA
Angiospermae
Genetic improvement
microsatellite
resistance genes
Spermatophyta
Fungi Imperfecti
Acp2
Thallophyta
ISSN:0179-9541, 1439-0523
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Beschreibung
Zusammenfassung:Most genes for resistance to barley leaf scald map either to the Rrs1 locus on the long arm of chromosome 3H, or the Rrs2 locus on the short arm of chromosome 7H. Other loci containing scald resistance genes have previously been identified using lines derived from wild barley, Hordeum vulgare ssp. spontaneum. A single dominant gene conditioning resistance to scald was identified in a third backcross (BC3F3) line derived from an Israeli accession of wild barley. The resistance gene is linked to three microsatellite markers that map to the long arm of chromosome 7H; the closest of these loci, HVM49, maps 11.5 cM from the resistance gene. As no other scald resistance genes have been mapped to this chromosome arm, it is considered to be a novel scald resistance locus. As the Acp2 isozyme locus is linked to this scald resistance locus, at 17.7 cM, Acp2 is assigned to chromosome 7H. Molecular markers linked to the novel scald resistance gene, designated Rrs15, can be used in breeding for scald resistance.
Bibliographie:istex:6E425C1D4718FC32943D624DCBB19EA94AEC4EE7
ArticleID:PBR137
ark:/67375/WNG-TC63X00S-1
With 4 figures
CI8288
Our designation Rrs15 is retained here to remain consistent with the nomenclature published in the review paper on scald resistance loci by Genger et al. (2003b). That designation was supported by the segregation data of Abbott et al. (1992), and the chromosome location data of this present paper, but cited as unpublished at that time. We note that in the interim, Schweizer et al. (2004) have reported a scald resistance gene on chromosome 2HS they label
Communicated by G. Fischbeck
Rrs15
.
ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0179-9541
1439-0523
DOI:10.1111/j.1439-0523.2005.01085.x