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: CRS-43-358

[Submit comment/correction]

Reference	CRS-43-358
Title	Identification of quantitative trait loci for resistance to crown rust in oat line MAM17-5
Journal	Crop Science
Year	2003
Volume	43
Pages	358-366
Author	Zhu S Kaeppler HF
Abstract	Summary: Crown rust, caused by the fungus Puccinia coronata Cda. f. sp. avenae Eriksson, is the most damaging disease of oat (Avena sativa L.). Breeding for resistance to crown rust has been an efficient and economical means to control the disease. Most of the resistance genes in recently released oat cultivars have been introgressed from the hexaploid, wild oat species A. sterilis L. The number of effective resistance genes has been rapidly decreasing. Characterization and utilization of new resistance sources are needed to ensure adequate resistance in future oat cultivars. Crown rust resistance in diploid, wild oat accessions was transferred to the hexaploid, cultivated oat line MAM17-5. The objective of this study was to identify the number, position, and effect of quantitative trait loci (QTL) and digenic QTL epistasis controlling crown rust resistance in MAM17-5. A linkage map of 272 molcular markers was used for this analysis. Reaction type and rust severity data were collected on field-grown adult plants from 152 F(5:6) recombinant inbred lines derived from the cross, 'Ogle'/MAM17-5. Composite interval mapping was conducted to identify genomic regions associated with crown rust resistance. Overall, two QTL, Pcq1 on linkage group 28 and Pcq2 on 29, were consistently identified for crown rust resistance in different years. Pcq1 and Pcq2 explained 48.5 to 70.1% and 9.6 to 14.0%, respectively, of the total phenotypic variation for crown rust resistance. Significant digenic, epistatic interactions were detected for QTL controlling rust severity but not reaction type. Marker-assisted selection targeting the major QTL, Pcq1, should be useful for efficient selection of crown rust resistance
External Databases	https://doi.org/10.2135/cropsci2003.3580
Map Data	Oat-2003-OxM-QTL1
QTL	QHT.OxM-QTL1_5 [ Show all 14 ]
Keyword	[ Hide all but 1 of 41 ] accessions avena avena sativa barley breeding composite interval mapping control crop cultivated oat diploid avena disease efficient epistasis fungus future gene genomic genomic regions hexaploid inbred line interval mapping linkage linkage map locus map mapping oat phenotypic variation quantitative quantitative trait loci recombinant inbred recombinant inbred line region resistance rust rust resistance selection source trait loci wild wild oat

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