title: Contrasting complexity of two rust resistance loci in flax.
abstract: DNA probes from the L6 rust resistance gene of flax (Linum usitatissimum) hybridize to resistance genes at the unlinked M locus, indicating sequence similarities between genes at the two loci. Genetic and molecular data indicate that the L locus is simple and contains a single gene with 13 alleles and that the M locus is complex and contains a tandem array of genes of similar sequence. Thus the evolution of these two related loci has been different. The consequence of the contrasting structures of the L and M loci on the evolution of different rust resistance specificities can now be investigated at the molecular level
authors.affiliation: Commonwealth Scientific and Industrial Research Organization, Division of Plant Industry, Canberra, Australia.
authors.forename: J G
authors.initials: JG
authors.lastname: Ellis
authors.forename: G J
authors.initials: GJ
authors.lastname: Lawrence
authors.forename: E J
authors.initials: EJ
authors.lastname: Finnegan
authors.forename: P A
authors.initials: PA
authors.lastname: Anderson