Linked Life Data

17426771

Source:http://linkedlifedata.com/resource/pubmed/id/17426771

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
2007-4-11
pubmed:abstractText
Net blotch of barley (Hordeum vulgare L.), caused by the fungal phytopathogen Pyrenophora teres Drechs. f. teres Smedeg., constitutes one of the most serious constraints to barley production worldwide. Two forms of the disease, the net form, caused by P. teres f. teres, and the spot form, caused by P. teres f. maculata, are differentiated by the type of symptoms on leaves. Several barley lines with major gene resistance to net blotch have been identified. Earlier, one of these was mapped in the Rolfi x CI 9819 cross to barley chromosome 6H, using a mixture of 4 Finnish isolates of P. teres f. teres. In this study, we used the same barley progeny to map resistance to 4 spot-type isolates and 4 net-type isolates of P. teres. With all net-type isolates, a major resistance gene was located on chromosome 6H, in the same position as described previously, explaining up to 88% of the phenotypic variation in infection response in the progeny. We designate this gene Rpt5. Several minor resistance genes were located on chromosomes 1H, 2H, 3H, 5H, and 7H. These minor genes were not genuinely isolate-specific, but their effect varied among isolates and experiments. When the spot-type isolates were used for infection, a major isolate-specific resistance gene was located on chromosome 5H, close to microsatellite marker HVLEU, explaining up to 84% of the phenotypic variation in infection response in the progeny. We designate this gene Rpt6. No minor gene effects were detected in spot-type isolates. The Ethiopian 2-rowed barley line CI 9819 thus carries at least 2 independent major genes for net-blotch resistance: Rpt5, active against net-type isolates; and Rpt6, active against specific spot-type isolates.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0831-2796
pubmed:author
pubmed:issnType
Print
pubmed:volume
49
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1564-71
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Mapping of major spot-type and net-type net-blotch resistance genes in the Ethiopian barley line CI 9819.
pubmed:affiliation
MTT Agrifood Research Finland, Biotechnology and Food Research, Myllytie 10, FIN-31600 Jokioinen, Finland. outi.manninen@mtt.fi
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't