title: Linkage mapping of sbm-1, a gene conferring resistance to pea seed-borne mosaic virus, using molecular markers in Pisum sativum.
abstract: The location of sbm-1 on the Pisum sativum genetic map was determined by linkage analysis with eight syntenic molecular markers. Analysis of the progeny of two crosses confirmed that sbm-1 is on chromosome 6 and permitted a more detailed map of this chromosome to be constructed. The inclusion of Fed-1 and Prx-3 among the markers facilitated the comparison of our map with the classical genetic map of pea. The sbm-1 gene is most closely linked to RFLP marker GS185, being separated by a distance of about 8 cM. To determine the practical value of GS185 as a marker for sbm-1 in plant breeding programs, the GS185 hybridization pattern and virus-resistance phenotype were compared in of a collection of breeding lines and cultivars. Three GS185 hybridization patterns were discerned among the lines. A strong association was found between one of these patterns and resistance to PSbMV.
authors.affiliation: New Zealand Institute for Crop and Food Research, Private Bag 4704, Christchurch, New Zealand.
authors.forename: G M
authors.initials: GM
authors.lastname: Timmerman
authors.forename: T J
authors.initials: TJ
authors.lastname: Frew
authors.forename: A L
authors.initials: AL
authors.lastname: Miller
authors.forename: N F
authors.initials: NF
authors.lastname: Weeden
authors.forename: W A
authors.initials: WA
authors.lastname: Jermyn