The 51 genotypes studied in the present investigation were grouped into 12 clusters. The maximum D2 value (D = 343.50) was observed between the genotypes AMC-3 and AMC-7, while lowest was observed between M-22 and MT-150 (D = 6.53). This suggested that, genotypes AMC-3 and AMC-7 were most apart genetically, while, genotypes M-22 and MT-150 were most close to each other genetically. The intra cluster distance was maximum for III, while it was minimum for cluster I. The inter cluster distance was maximum between X and XII, while it was minimum between VI and VII. On the basis of inter cluster distance means and per se performance the genotype viz., AMC-3, M-24, AMC-23 and M-43 were identified to suitable for hybridization programme

The present investigation on "Inheritance of grain yield and its components in Triticum aestivum L." was undertaken in three crosses, each with the set of six generations viz., P1, P2, F1, F2, B1 and B2.The present investigation revealed that cross NI-5439 x PHR-1009 can provide better opportunities for improvement through selection procedure than rest of the crosses i.e. NIAW-917 x VL-852 and HD-2189 x FLW-8. Though significant dominance and dominance x dominance gene components were observed for many characters in the three crosses studied, it cannot be exploited because of presence of duplicate type of epistasis. In such a situation maximum gain could be attained by maintaining considerable heterozygosity through mating of selected plants in early segregating generations or some sort of Recurrent Selection, Diallel Selective Mating System (Jensen, 1970) or Biparental Mating (Joshi and Dhawan, 1966) should be practiced. This would certainly enhance possibility that vvarious recombinations may result in the accumulation of favourable genes in ultimate homozygous lines.few cycles of recurrent selection followed by pedigree breeding approach can be suggested to improve the Yield.