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Genetic improvement in wheat is prerequisite for increasing productivity on sustainable basis and feeding over increasing population. In the present study a set of eleven durum lines selected from IDYN (International Durum yield nursery) received from CIMMYT along with check were evaluated at Cereal Crops Research Institute, Pirsabak Nowshera during 2011-12. Highly significant differences (P≤ 0.01) were observed among the selected durum wheat lines for all the studied traits. Days to heading, days to maturity, plant height, spike length, Spikelet spike-1, 1000 kernel weight and grain yield varied from 112 to 126 days, 151to 163 days and 85 to 100 cm, 6.3 to 9.2, 18 to 23, 37 to 53g and 1667 to 2373 kg ha-1 respectively. Based on mean performance for plant height, days to heading and days to maturity DWL-2 was found best as it was short stature, headed and matures earlier. DWL-10, DWL-3 and DWL-8 were found best for spike length, Spikelet spike-1 and 1000 kernel weight respectively. Mean comparisons of grain yield showed that DWL-9 line had the highest grain yield (2373 kg ha-1) than the other lines and check (1667 kg ha-1). High genotypic and high heritability were observed for all the studied traits. Heritability estimates in broad sense for days to heading, days to maturity, plant height, spike length, Spikelet spike-1, 1000 kernel weight and grain yield was 0.91, 0.93, 0.68, 0.74, 0.76, 0.78 and 0.75 respectively. Estimates of correlations between traits indicate those days to heading showed positive correlation with days to maturity (0.81), plant height (0.82). Positive correlation of spike length with Spikelet spike-1 (0.80) and 1000 …