بررسی تنوع فنوتیپی اینبرد لاین های مختلف گندم نان درتنش خشکی آخرفصل

Due to the importance of bread wheat and drought stress, this research carried out to detect the drought tolerance of 190 different inbred lines derived from cross between Roshan * Superhead as long as them check varieties (Arg , Bam, Kavir) .Field experiment was done at Shahid Bahonar University of Kerman, research farm on growing season of 2010-2011 based on Augmented design. Irrigation cut off was done while the 50% of population were reached to flowering stage. Different agronomic traits as well as final scoring and grain yield have been measured. Result revealed that there is significant difference among all the lines for under studied traits. Lines No. 110,111,201,321,358 and 374 were categorized as the most tolerant and high yielding lines and would be recommended for the future studies. Subsequently the modeling of grain yield under water limited condition was done based on the other traits, using different multivariate statistical methods. Based on step wise multiple regression, path coefficient analysis and factor analysis, No of seeds per plant and plant height had the effective role on grain yield variation explanation. It means these Traits can be considered as the effective traits for grain yield important in plant breeding programs.