title: The nucleolus organizers of diploid wheats revealed by in situ hybridization.
abstract: Labelled RNA, transcribed in vitro from wheat ribosomal DNA cloned in a bacterial plasmid, has been hybridised to metaphase chromosomes of five diploid wheats. Autoradiography of the chromosomes has provided unequivocal evidence that these genotypes possess two pairs of nucleolus organizer chromosomes. The diploid wheat accessions used possess widely differing numbers of ribosomal RNA genes.
authors.affiliation: Department of Cytogentics, Plant Breeding Institute, Trumpington, Cambridge, England.
authors.forename: W L
authors.initials: WL
authors.lastname: Gerlach
authors.forename: T E
authors.initials: TE
authors.lastname: Miller
authors.forename: R B
authors.initials: RB
authors.lastname: Flavell