Department of Plant Breeding, G. B. Pant University of Agriculture & Technology, Pantnagar-263 145, Nainital, U. P.
1A part of the thesis submitted in partial fulfilment of M.Sc. (Ag.) degree by senior author.
The objective of the present study was to investigate the nature and quantum of diversity in a population of hexaploid triticales. Eight yield components viz. grain yield per plant, number of spikelets per main spike, number of grains per main spike, length of main spike, effective tiller number per plant, 100-grain weight, plant height and days to 75% maturity were studied. D2 analysis helped in grouping the genotypes into 16 cluters. Grain yield per plant and plant height contributed maximum towards genetic divergence. Inter-cluster D2 values indicated the low order of genetic diversity in the material. Using metroglyph anitlysis with grain yield per plant, number of grains per main spike, 100-grain weight and tillering capacity, the genotypes were classified into 11 groups. Hundred grain weight and in certain cases tillering capacity were found to be the limiting factors in yield expression in relation to wheat check Sonalika and UP 368.
