title: Chromosomal distribution of 18S-25S rDNA in four Lupinus species visualized by fluorescence in situ hybridization.
abstract: The number and position of 18S-25S rDNA sites in 4 selected Lupinus species are reported for the first time. L. atlanticus, L. subcarnosus and L. paniculatus had two rDNA loci, while L. albus exhibited only one loci. Among these 4 species, all of them exhibited one large pair of strong signals that extends from the short arm to a NOR on a chromosome satellite. L. atlanticus, L. subcarnosus, L. paniculatus had one more locus of 18-25S rDNA, but a pair of weak hybridization signals were observed in L. paniculatus when 18S-25S rDNA was used as probe. The results are discussed in terms of the evolutionary relationships among these species.
authors.affiliation: College of Bioscience and Biotechnology, Yangzhou University, 225009 Yangzhou, China.
authors.forename: F
authors.initials: F
authors.lastname: Kong
authors.forename: E
authors.initials: E
authors.lastname: Rudloff
authors.forename: R J
authors.initials: RJ
authors.lastname: Snowdon
authors.forename: Y P
authors.initials: YP
authors.lastname: Wang
mesh_terms: D032461:Chromosomes, Plant / Q000235:genetics*; D004275:DNA, Ribosomal; D019143:Evolution, Molecular; D031297:Lupinus / Q000235:genetics*; D040641:Quantitative Trait Loci / Q000235:genetics; D012335:RNA, Ribosomal / Q000235:genetics*; D012337:RNA, Ribosomal, 18S / Q000235:genetics*; D013045:Species Specificity
chemical_list: D004275:DNA, Ribosomal; D012335:RNA, Ribosomal; D012337:RNA, Ribosomal, 18S; C065039:RNA, ribosomal, 25S