title: B chromosomes in Nierembergia aristata (Solanaceae): nucleolar activity and competition with the A chromosomes.
authors.affiliation: Instituto de Investigaciones en Biodiversidad y Medioambiente, CONICET-Universidad Nacional del Comahue, Bariloche, Argentina. mcacosta@crub.uncoma.edu.ar
authors.forename: M C
authors.initials: MC
authors.lastname: Acosta
authors.forename: E A
authors.initials: EA
authors.lastname: Moscone