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GrainGenes Reference Report: PMB-48-625

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Reference
PMB-48-625
Title
Genetic dissection of a major Fusarium head blight QTL in tetraploid wheat
Journal
Plant Molecular Biology
Year
2002
Volume
48
Pages
625-632
Author
Otto CD
Kianian SF
Elias EM
Stack RW
Joppa LR
Abstract
Summary: The devastating effect of Fusarium head blight (FHB) caused by Fusarium graminearum has led to significant financial losses across the Upper Midwest of the USA. These losses have spurred the need for research in biological, chemical, and genetic control methods for this disease. To date, most of the research on FHB resistance has concentrated on hexaploid wheat (Triticum aestivum L.) lines originating from China. Other sources of resistance to FHB would be desirable. One other source of resistance for both hexaploid wheat and tetraploid durum wheat (T. turgidum L. var. durum) is the wild tetraploid, T. turgidum L. var. dicoccoides (T. dicoccoides). Previous analysis of the 'Langdon'-T. dicoccoides chromosome substitution lines, LDN(Dic), indicated that the chromosome 3A substitution line expresses moderate levels of resistance to FHB. LDN(Dic-3A) recombinant inbred chromosome lines (RICL) were used to generate a linkage map of chromosome 3A with 19 molecular markers spanning a distance of 155.2 cM. The individual RICL and controls were screened for their FHB phenotype in two greenhouse seasons. Analysis of 83 RICL identified a single major quantitative trait locus, Qfhs.ndsu-3AS, that explains 37% of the phenotypic or 55% of the genetic variation for FHB resistance. A microsatellite locus, Xgwm2, is tightly linked to the highest point of the QTL peak. A region of the LDN (Dic-3A) chromosome associated with the QTL for FHB resistance encompasses a 29.3 cM region from Xmwg14 to Xbcd828
Locus
Xcdo395-3A
[ Show all 19 ]
Map Data
T.dicoccoides, FHB QTL
QTL
QFhs.ndsu-3AS
QFhs.ndsu.3AS
Trait Study
FHB, Type II, Tdicoccoides, Otto02
Keyword
barley
[ Show all 59 ]