تجزیه مرکب لاین‌های برتر گندم نان متحمل به خشکی آخر فصل (WS-90) در استان کرمانشاه

Abs. drought stress is one of the most important factors in yield production of plants, which reduces its performances. In order to investigate advanced bread wheat lines for introducing new cultivar and replace existing varieties, eighteen advanced bread wheat lines tolerant to end season drought as well as Sirwan and WS-86-14 line as check were examined in a randomized complete block design with three replications in Islam Abad Agricultural Research Station during two years from 2011-2012 and 2012-2013. Area equal to 6 square meters plot and consists of six nesting density was 400 seeds per square meter. Planting and irrigation was performed on the 27th of November. The results of combined analysis showed significant differences between treatments at 1%. Duncan’s grouping of data showed that three lines WS-90-9, WS-90-10 and WS-90-18 had the highest mean yield and assigned to a group. Other agronomic characteristics of this group were diseases tolerant particularly resistant to rust, medium plant height earliness and should be noted that a safe alternative for old cultivars. The history of this group showed that the test farm breeding in PRWYT-WS in 2009-2010 and ARWYT-WS in 2010- 2011 was better lines. These three lines were selected for breeding and introduced varieties for further experiments.