LOCATION OF THE SELF-INCOMPATIBILITY GENE ON THE ALMOND LINKAGE MAP

A progeny obtained from the almond cross 'Ferragnes' x 'Tuono' (Prunus amygdalus Batsch) was used to study the self-incompatibility trait in three different ways: fruit set, pollen tube growth and stylar ribonu clease activity. As expected from the genotypes of the parents, all pr ogeny appeared phenotypically as self-compatible. However, the progeny could be scored for the segregation of stylar ribonuclease isozymes a nd thus allowed the incompatibility locus to be placed on the almond l inkage map.