The experimental material comprised of 45 F1s generated by crossing ten diverse genotypes of rajmash(Phaseolus vulgaris L.) in a diallel mating design. The set of 45 test cross progenies along with their  ten  parents were evaluated in a randomized block design with two replications at the Pulse Research Substation, SKUAST-K Habak, KVK Farm SKUAST-K Pombai, Anantnag and the Faculty of Agriculture,SKUAST-K Wadoora to study the gene action for yield and quality traits in rajmash (P. vulgaris L.). Thecomponent analysis indicated preponderance of non-additive gene effects in the inheritance of all thetraits studied in the data pooled over environments. Net dominance effect over all loci in heterozygotes(h2) was significant and positive for all the traits indicating unidirectional dominance, which was alsoconfirmed from the value2ˆH /41ˆH that indicated asymmetrical gene distribution. The value of KD/KR was more than one (excepting 100 seed weight), indicating the presence of excess dominant genes in parents, which was also verified by 2ˆh /2ˆH value in most of the cases. Heritability (n.s) was observed to be low for all the traits. The graphical analysis indicated dominance in the case of primary branches per plant, secondary branches per plant, number of pods per plant, pod length and seed yield per plant, whereas for rest of the traits, partial to complete dominance was observed. Intermating among the progenies within and between promising crosses in early segregating generations is suggested for further improvement. 

Key words: Rajmash, diallel, genetic analysis, inheritance.