معرفی لاین های کلزا متحمل به تنش خشکی با استفاده از شاخص های تحمل به تنش خشکی

In order to identify drought stress tolerant oilseed rape lines, 18 improved lines were evaluated under two conditions, normal and drought stress condition, in Agricultural Research Station of Islam Abad-e-Gharb Station in 2013-2014 growing season. Under drought stress condition, irrigation was cut from flowering stage. Analysis of variance for indices showed significant differences between cultivars in MP, STI and GMP.With consideration of correlation between indices and yield under stress and non-stress, these indices were identified as the best indices for selection of tolerant cultivars. Principal component analysis based on drought tolerant indices showed that two first components explained 99.8% of data variation. Distribution of oilseed lines based on coefficient for two first components showed that L146, L201, Ks7 and L183 were located in A region of biplot. In other hand, these lines had high seed yield under both conditions.