Query (optional)   in Class  All Allele Author Colleague Collection Assembly Gene Gene Class Gene Product Germplasm Image Journal Keyword Library Locus Map Map Data Marker Pathology Polymorphism Probe Protein QTL Rearrangement Reference Sequence Species Trait Trait Study Two Point Data  

---

GrainGenes Reference Report: PBR-121-124

[Submit comment/correction]

Reference	PBR-121-124
Title	Quantitative trait loci for scald resistance in barley localized by a non-interval mapping procedure
Journal	Plant Breeding
Year	2002
Volume	121
Pages	124-128
Author	Jensen J Backes G Skinnes H Giese H
Abstract	Summary: Three quantitative trait loci (QTL) for scald resistance in barley were identified and mapped in relation to molecular markers using a population of chromosome doubled-haploid lines produced from the F1 generation of a cross between the spring barley varieties 'Alexis' and 'Regatta'. Two field experiments were conducted in Denmark and two in Norway to assess disease resistance. The percentage leaf area covered with scald (Rhynchosporium secalis) ranged from 0 to 40% in the 189 doubled-haploid (DH) lines analysed. One quantitative trait locus was localized in the centromeric region of chromosome 3H, Qryn3, using the MAPQTL program. MAPQTL was unable to provide proper localization of the other two resistance genes and so a non-interval QTL mapping method was used. One was found to be located distally to markers on chromosome 4H (Qryn4) and the other, Qryn6, was located distally to markers on chromosome 6H. The effects of differences between the Qryn3, Qryn4 and Qryn6 alleles in two barley genotypes for the QTL were estimated to be 8.8%, 7.3% and 7.0%, respectively, of leaf covered by scald. No interactions between the QTLs were found
Keyword	[ Hide all but 1 of 44 ] allele barley barley genotypes barley varieties chromosome denmark denso growth disease doubled-haploid doubled-haploid lines field field experiment gene generation hordeum vulgare isozyme leaf area linkage map localization mapping maximum-likelihood method mlo resistance molecular marker norway pathotype population program qtl qtl mapping quantitative trait quantitative trait loci quantitative trait locus resistance rflp map rhynchosporium rhynchosporium secalis scald scald-resistance spring spring barley trait trait loci yield

GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.