title: Evidence for 'cross-talk' between A and B chromosomes of rye.
abstract: Spontaneous DNA insertions from supernumerary B chromosomes (Bs) into the standard A chromosome complement were detected in rye (Secale cereale L.), using fluorescent in situ hybridization (FISH) analysis with the D1100 B-specific sequence probe. The insertions were seen in individuals derived from plants possessing deleted Bs, characterized in this study by not having the B-specific sequences that are normally found at the distal part of the long arm of the standard rye B. This result supports the case for the spontaneous introgression of B-specific DNA into the A chromosome genome, and it indicates that 'cross-talking' between A and B chromosomes may occur in wild populations.
authors.affiliation: Seccão de Genética, Centro de Botânica Aplicada à Agricultura, Instituto Superior de Agronomia, Tapada da Ajuda, 1349-017 Lisbon, Portugal.
authors.forename: Teresa
authors.initials: T
authors.lastname: Ribeiro
authors.forename: Bruno
authors.initials: B
authors.lastname: Pires
authors.forename: Margarida
authors.initials: M
authors.lastname: Delgado
authors.forename: Wanda
authors.initials: W
authors.lastname: Viegas
authors.forename: Neil
authors.initials: N
authors.lastname: Jones
authors.forename: Leonor
authors.initials: L
authors.lastname: Morais-Cecílio
mesh_terms: D032461:Chromosomes, Plant / Q000235:genetics*; D015342:DNA Probes; D017404:In Situ Hybridization, Fluorescence; D012434:Secale / Q000235:genetics*; D014178:Translocation, Genetic / Q000235:genetics*
chemical_list: D015342:DNA Probes