تنوع مورفولوژيكي و زراعي لاين هاي گلرنگ بهاره در شرايط ديم مناطق سردسير

Morphologic and Agronomic Variations of Safflower lines Under Cold Region Dryland Condition

In order to study seed yield and yield components of safflower germplasm, an experiment was conducted at the Maragheh Dryland Agricultural Reasearch Center during the years of 2007-2008. The experiment was arranged in a simple lattice design with two replications. This experiment contained 79 foreign lines and 21 local landraces. Some traits like days to %50 flowering, plant height, number of heads per plant, height of first branch, numbers of primary and secondary branches, percent mildew infection of plants, seed number per primary and secondary heads, 100 seed weight, both in primary and secondary heads and seed yield were recorded for all genotypes. Analysis of variance showed significant differences in all traits, except in secondary branch number. Local Iranian landraces possessed highest values for most traits. Line number 60 from Spain had highest seed yield (1194.22 kg/ha). Line number 88 from Iran had the highest number of heads, line number 2 from Kerman was earliest in flowering time (44 days to flowering) and line number 83 from Portugal had highest number of seeds per head. The differences of plant height among most of the lines under study were not statistically significant. The lowest coefficient of variation (CV) was obtained for plant percent of mildew infection (61.51). Plant height, height of primary branches from ground and seed number in primary head were highly correlated positively with seed yield. The lines under study, based on cluster analysis, fell into three groups. Grouping of the lines on the basis traits under study was not in coincidence with their geographical grouping