title: Comparative analyses in Lotus: the cytogenetic map of Lotus uliginosus Schkuhr.
abstract: A comparative cytogenetic map was built for Lotusuliginosus (2n = 12), expanding previous analyses that revealed intra- and interspecific chromosomal rearrangements in the model legume L. japonicus, L. filicaulis, and L. burttii. This species is positioned in a sister clade of the previously-mapped species and is proposed as one of the progenitors of L. corniculatus, the main forage crop of the genus. The cytogenetic map allowed the location of 12 genomic regions to be compared between these species. A high macrosynteny was revealed, but it was interrupted by a translocation involving chromosomes 3 and 5, a new rearrangement for the genus. Also, a transposition on chromosome 2 was found in L. japonicus 'Miyakojima'. Furthermore, changes in the number, size, and position of rDNA sites were observed, as well as an intraspecific size heteromorphism of the 5S rDNA site on L. uliginosus chromosome 6. The karyotype differences observed are proportional to the phylogenetic distance among these species.
authors: Laboratory of Plant Cytogenetics and Molecular Biology, Department of Botany, Federal University of Pernambuco, Recife, Brazil.
authors: J
authors: J
authors: Ferreira
authors: S
authors: S
authors: Mendes
authors: M
authors: M
authors: Dall'agnol
authors: N
authors: N
authors: Sandal
authors: S
authors: S
authors: Sato
authors: A
authors: A
authors: Pedrosa-Harand
mesh_terms: D002874:Chromosome Mapping; D032461:Chromosomes, Plant; D017404:In Situ Hybridization, Fluorescence; D000070116:Lotus / Q000235:genetics*