title: Ryd4 (Hb): a novel resistance gene introgressed from Hordeum bulbosum into barley and conferring complete and dominant resistance to the barley yellow dwarf virus.
abstract: Barley yellow dwarf virus (BYDV) causes high yield losses in most of the major cereal crops worldwide. A source of very effective resistance was detected within the tetraploid wild species of Hordeum bulbosum. Interspecific crosses between a resistant H. bulbosum accession and H. vulgare cv. 'Igri' were performed to transfer this resistance into cultivated barley. Backcrosses to H. vulgare resulted in offspring which carried a single subterminal introgression of H. bulbosum chromatin on barley chromosome 3HL and proved to be fully resistant to BYDV-PAV, as inferred by ELISA values of zero or close to zero and lack of BYDV symptoms. Genetic analysis indicated a dominant inheritance of the BYDV-PAV resistance factor, which we propose to denote Ryd4 ( Hb ) . The identity and effect of Ryd4 ( Hb ) are discussed in relation to other known genes for BYDV resistance or tolerance, as well as the relevance of this gene for resistance breeding in barley.
authors: Institute for Breeding Research on Agricultural Crops, Julius Kühn Institute, Federal Research Centre for Cultivated Plants, 18190 Gross Lüsewitz, Germany.
authors: Margret
authors: M
authors: Scholz
authors: Brigitte
authors: B
authors: Ruge-Wehling
authors: Antje
authors: A
authors: Habekuss
authors: Otto
authors: O
authors: Schrader
authors: Galina
authors: G
authors: Pendinen
authors: Kristin
authors: K
authors: Fischer
authors: Peter
authors: P
authors: Wehling
mesh_terms: D000704:Analysis of Variance; D023902:Chromosome Pairing / Q000235:genetics; D020090:Chromosome Segregation; D032461:Chromosomes, Plant / Q000235:genetics; D003433:Crosses, Genetic; D004797:Enzyme-Linked Immunosorbent Assay; D005799:Genes, Dominant; D017343:Genes, Plant; D005819:Genetic Markers; D005838:Genotype; D001467:Hordeum / Q000166:cytology / Q000235:genetics* / Q000821:virology*; D007113:Immunity, Innate / Q000235:genetics*; D017404:In Situ Hybridization, Fluorescence; D007178:Inbreeding; D040582:Inheritance Patterns / Q000235:genetics; D007621:Karyotyping; D017793:Luteovirus / Q000502:physiology*; D008540:Meiosis; D008677:Metaphase; D010935:Plant Diseases / Q000235:genetics / Q000276:immunology* / Q000821:virology*; D011995:Recombination, Genetic / Q000235:genetics
chemical_list: D005819:Genetic Markers