اثر تنش کم‌آبی بر عملکرد و اجزای عملکرد لاین‌های اینبرد نوترکیب گندم

To evaluate the effect of water deficit stress on yield and yield components, 149 wheat recombinant inbred lines derived from a cross between Yecora Rojo and No. 49 were evaluated using randomized complete block design with two replications under well-watered and water deficit after flowering stage conditions during two years. Combined analysis of variance revealed significant differences between lines for all the studied traits. Water stress caused a significant reduction in the mean of all traits. The highest grain yield under well-watered condition were observed for lines number 86, 139 and 65 (333.77, 308.98 and 303.81 gr/m2, respectively) with an average of 198.93 gr/m2 and under water deficit condition lines number 65, 52 and 138 (218.63, 213.69 and 206.3 gr/m2, respectively) showed the highest grain yield with an average of 136.76 gr/m2. Under normal irrigation and water stress, the mean of number of spikes per square meter, number of grains per spike and grain weight were 414.38 and 323.78, 23.35 and 19.19 and 30.3 and 27.6 g, respectively.