title: The genetic location of the self-incompatibility locus in white clover (Trifolium repens L.).
abstract: White clover (Trifolium repens L.) is a forage legume of considerable economic importance in temperate agricultural systems. It has a strong self-incompatibility system. The molecular basis of self-incompatibility in T. repens is unknown, but it is under the control of a single locus, which is expressed gametophytically. To locate the self-incompatibility locus (S locus) in T. repens, we carried out cross-pollination experiments in an F(1) mapping population and constructed a genetic linkage map using amplified fragment length polymorphism and simple sequence repeat markers. As the first step in a map-based cloning strategy, we locate for the first time the S locus in T. repens on a genetic linkage map, on the homoeologous linkage group pair 1 (E), which is broadly syntenic to Medicago truncatula L. chromosome 1. On the basis of this syntenic relationship, the possibility that the S locus may or may not possess an S-RNase gene is discussed.
authors.affiliation: Teagasc Crops Research Centre, Oak Park, County Carlow, Ireland.
authors.forename: Nora M
authors.initials: NM
authors.lastname: Casey
authors.forename: Dan
authors.initials: D
authors.lastname: Milbourne
authors.forename: Susanne
authors.initials: S
authors.lastname: Barth
authors.forename: Melanie
authors.initials: M
authors.lastname: Febrer
authors.forename: Glyn
authors.initials: G
authors.lastname: Jenkins
authors.forename: Michael T
authors.initials: MT
authors.lastname: Abberton
authors.forename: Charlotte
authors.initials: C
authors.lastname: Jones
authors.forename: Daniel
authors.initials: D
authors.lastname: Thorogood
mesh_terms: D054458:Amplified Fragment Length Polymorphism Analysis; D002874:Chromosome Mapping; D008040:Genetic Linkage / Q000235:genetics*; D005819:Genetic Markers / Q000235:genetics*; D018895:Microsatellite Repeats; D026801:Synteny; D029921:Trifolium / Q000235:genetics*
chemical_list: D005819:Genetic Markers
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