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Effects of Sowing Date and Chitosan on Some Characters of Canola (Brassica napus L.) Genotypes
Banafsheh Beheshti Monfared,Ghorban Noormohamadi,Amir Hossein Shirani Rad,Eslam Majidi Hervan 한국작물학회 2020 Journal of crop science and biotechnology Vol.23 No.1
Changes in the environment that are associated with different sowing dates can be expected to alter canola (Brassica napus L.) growth and development. The objective of this work was to study the effect of sowing date and chitosan on some characters of canola genotypes. Five genotypes (RGS003, Sarigol, Zafar, Dalgan, and Julius) were sown in three sowing dates (October 7, 17, and 27), for two years (2014-2015 and 2015-2016). A factorial split-plot experiment was conducted in a complete randomized blocks design with three replications, where the sowing dates and the two levels of chitosan (0 [control] and 0.2% concentrations) were allotted to main plots and the genotypes were allotted to subplots. The ANOVA revealed that the main effects of sowing date, chitosan and genotype were significant for almost all measured characters. In addition, the interaction effect of sowing date and genotype was significant for plant height, number of silique in shoots, number of seeds per main silique, 1000-seed weight and oil yield. The seed and oil yields in the third sowing date were reduced by 0.46 and 0.49%, respectively, compared to the first sowing date. The results of the present study indicated that early sowing date and chitosan application had positive effects on the measured characters. Cluster analysis divided the cultivars into two groups. Also, the PCA revealed that the three first PC confirmed about 98% of the total variance among the studied genotypes.