title: Karyotype analysis of four Vicia species using in situ hybridization with repetitive sequences.
abstract: Mitotic chromosomes of four Vicia species (V. sativa, V. grandiflora, V. pannonica and V. narbonensis) were subjected to in situ hybridization with probes derived from conserved plant repetitive DNA sequences (18S-25S and 5S rDNA, telomeres) and genus-specific satellite repeats (VicTR-A and VicTR-B). Numbers and positions of hybridization signals provided cytogenetic landmarks suitable for unambiguous identification of all chromosomes, and establishment of the karyotypes. The VicTR-A and -B sequences, in particular, produced highly informative banding patterns that alone were sufficient for discrimination of all chromosomes. However, these patterns were not conserved among species and thus could not be employed for identification of homologous chromosomes. This fact, together with observed variations in positions and numbers of rDNA loci, suggests considerable divergence between karyotypes of the species studied.
authors.affiliation: Institute of Plant Molecular Biology, Laboratory of Molecular Cytogenetics, Branisovská 31, Ceské Budejovice, CZ-37005, Czech Republic.
authors.forename: Alice
authors.initials: A
authors.lastname: Navrátilová
authors.forename: Pavel
authors.initials: P
authors.lastname: Neumann
authors.forename: Jirí
authors.initials: J
authors.lastname: Macas
mesh_terms: D002455:Cell Division / Q000235:genetics / Q000502:physiology; D017124:Conserved Sequence / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D005819:Genetic Markers / Q000235:genetics; D018745:Genome, Plant; D017404:In Situ Hybridization, Fluorescence; D007621:Karyotyping / Q000379:methods; D020401:Primed In Situ Labeling; D012335:RNA, Ribosomal / Q000235:genetics; D012091:Repetitive Sequences, Nucleic Acid / Q000235:genetics*; D020080:Tandem Repeat Sequences / Q000235:genetics; D031306:Vicia / Q000235:genetics* / Q000378:metabolism; D033022:Vicia sativa / Q000235:genetics / Q000378:metabolism
chemical_list: D004275:DNA, Ribosomal; D005819:Genetic Markers; D012335:RNA, Ribosomal