Genetic variability and correlation analysis of bread wheat (Triticum Aestivum L.) accessions

Experimental plot was conducted to test the variation with correlation of one hundred bread wheat (triticum aestivum l.) germplasms under the area of plant breeding and genetics department,faculty of agriculture,gomal university,dera ismail khan,in the year 2006. all the germplasms were evaluated for the traits,spike length (cm),number of spikelets spike-1,grain yield plant-1(gm),1000-grain weight (gm) and grain yield (kg ha-1). genetic diversity was statistically found for all the traits. two germplasm [parc/jica 004275 (01)] had maximum spike length (cm) i.e.,22.4 (cm). maximum variations were observed among the accessions for spike length (cm) with coefficient of variation 17.89%. the accession [parc/jica 004280 (01)] has maximum 31.8 number of spikelets spike-1 with coefficient of variation 18.45%. the entry [parc/jica 003845 (01)],[parc/jica 004279 (05)],[parc/jica 004274 (01)] and [parc/jica 004266 (04)] having greatest 1000-grain weight (g) i.e. (46.2,46.1,45.6 and 45.1 g) having greatest 1000-grain weight (g) with coefficient of variation 21.39%. the genotypes [parc/jica 004280 (01)],[parc/jica 004266 (05)] and [parc/jica 004267 (02)] had a maximum grain yield (kg ha-1) i.e.,(5185,5061 and 5051 kg ha-1) with coefficient of variation 11.75%. the spike length shows positive significant correlation with number of spikelets spike-1,grain yield plant-1 and grain yield (kg ha-1). while positive correlation was observed from spike length and 1000-grain weight. number of spikelets spike-1 had highly significant correlation with grain yield plant-1 and grain yield (kg ha-1). high significantly positive correlation was depicted from grain yield plant-1 and grain yield (kg ha-1) while,1000-grain weight had positive highly significant correlation with grain yield (kg ha-1).