title: Eyespot resistance gene Pch-1 in H-93 wheat lines. Evidence of linkage to markers of chromosome group 7 and resolution from the endopeptidase locus Ep-D1b.
abstract: Gene Pch1, which confers resistance to eyespot disease (Pseudocercosporella herpotrichoides Fron), has been located on chromosome 7D in the H-93 wheat-Aegilops ventricosa transfer lines using isozyme markers and DNA probes corresponding to group 7 chromosomes. Previous experiments had failed to ascertain this location. The lack of segregation of the resistance trait in progeny from reciprocal crosses between lines H-93-70 and VPM1 indicates that their respective resistance factors are allelic. Line H-93-51 carries the endopeptidase allele Ep-D1b but is susceptible to eyespot, which indicates that resistance to eyespot is not a product of the Ep-D locus, as had been proposed in a previous hypohesis.
authors.affiliation: Bioquímica y Biología Molecular. E.T.S. Ingenieros Agrónomos. U.P.M., E-28040, Madrid, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Mena
authors.forename: G
authors.initials: G
authors.lastname: Doussinault
authors.forename: I
authors.initials: I
authors.lastname: Lopez-Braña
authors.forename: S
authors.initials: S
authors.lastname: Aguaded
authors.forename: F
authors.initials: F
authors.lastname: García-Olmedo
authors.forename: A
authors.initials: A
authors.lastname: Delibes