INTEGRATION OF THE CLASSICAL AND RFLP LINKAGE MAPS OF THE SHORT ARM OF TOMATO CHROMOSOME-1

The classical map of the short arm of chromosome 1 of tomato (Lycopers icon esculentum) has been shown to contain inaccuracies while the RFLP map of this region is known to be generally accurate. Molecular analy sis of populations derived from crosses between L. esculentum lines ca rrying chromosome 1 classical markers and L. pennellii has enabled us to produce an integrated classical and RFLP marker map of this region. New data concerning the linkage relationships between classical marke rs have also been combined with previous data to produce a new classic al map of the short arm of chromosome 1. The orders of the classical m arkers on these two new maps are in almost complete agreement and are very different to that shown on the previous classical map.