Evaluation of normal and late planting effects on variation and relationship of the quantitative traits in rapeseed

Effect of normal and late planting on yield associated traits in 10 spring rapeseed (Brassica napus L.), genotypes were evaluated in randomized complete block design with four replications. Significant planting dates effects were exhibited for days to flowering, plant height, yield components and seed yield, indicating that all the traits were significantly affected by planting dates. Significant mean squares of the genotypes for all the traits revealed the significant genetic differences for these traits. On the basis of late to normal dates mean ratio, pods on main raceme and seed yield were more affected from late planting date than the other traits. Yield associated traits were more correlated to seed yield in normal planting date than late planting date condition. Among yield components, pods per plant were correlated with seed yield in both planting dates’ conditions. Seed yield was significantly affected by planting dates, and the mean values for normal and late planting dates were 2726 and 1599.3 kg ha -1 , respectively. Genotypes Zafar, Zabol0 and Zabol15 with seed yield of 3300, 3115 and 2997.5 kg ha -1 , respectively, produced higher yield in normal planting date condition.