title: Molecular markers in breeding for virus resistance in barley.
abstract: The soil-borne barley yellow mosaic virus disease (BaMMV, BaYMV, BaYMV-2) and the aphid-transmitted barley yellow dwarf virus (BYDV) are serious threats to winter barley cultivation. Resistance to barley yellow mosaic virus disease has been identified in extensive screening programmes and several recessive resistance genes have been mapped, e.g. rym4, rym5, rym9, rym11, rym13. In contrast to barley yellow mosaic virus disease, no complete resistance to BYDV is known in the barley gene pool, but tolerant accessions have been identified and QTL for BYDV-tolerance have been detected on chromosomes 2HL and 3HL. The use of resistance and tolerance in barley breeding can be considerably improved today by molecular markers (RFLPs, RAPDs, AFLPs, SSRs, STSs, SNPs), as they facilitate (i) efficient genotyping and estimation of genetic diversity; (ii) reliable selection on a single plant level independent of symptom expression in the field (iii) acceleration of back crossing procedures; (iv) pyramiding of resistance genes; (v) detection of QTL and marker-based combination of positive alleles; and (vi) isolation of resistance genes via map-based cloning.
authors.affiliation: Institute of Crop Science and Plant Breeding I, Justus-Liebig-University, Heinrich-Buff-Ring, Giessen, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Ordon
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Friedt
authors.forename: Konstanze
authors.initials: K
authors.lastname: Scheurer
authors.forename: Bettina
authors.initials: B
authors.lastname: Pellio
authors.forename: Kay
authors.initials: K
authors.lastname: Werner
authors.forename: Gisela
authors.initials: G
authors.lastname: Neuhaus
authors.forename: Winfried
authors.initials: W
authors.lastname: Huth
authors.forename: Antje
authors.initials: A
authors.lastname: Habekuss
authors.forename: Andreas
authors.initials: A
authors.lastname: Graner
mesh_terms: D000483:Alleles; D000818:Animals; D001042:Aphids / Q000472:pathogenicity / Q000821:virology; D003001:Cloning, Molecular; D005819:Genetic Markers; D005838:Genotype; D001467:Hordeum / Q000235:genetics* / Q000821:virology*; D006824:Hybridization, Genetic; D007113:Immunity, Innate / Q000235:genetics*; D017793:Luteovirus / Q000472:pathogenicity*; D009029:Mosaic Viruses / Q000235:genetics* / Q000472:pathogenicity*
chemical_list: D005819:Genetic Markers