Study of canola (Brassica napus L.) genotypes for salt tolerance at germination stage via multivariate analysis
Paper Details
Study of canola (Brassica napus L.) genotypes for salt tolerance at germination stage via multivariate analysis
Abstract
This study was conducted to evaluate the effect of salt on the germination and early vegetative growth of canola genotypes. In order to an experiment was performed as factorial form under completely randomized design (CRD) with 3 replications. Genotype factor was contains of 12 genotypes and 6 levels of salt (control, -3, -6, -9, – 12 and -15 bar) with NaCl. Results of correlation showed that seedling length had the most positive and significant correlation with index seed vigour (r=0.97**). Factor analysis based on principal component analysis showed that three principle components had eigen values more than 1 and together accounted for 88% of the variability of original data under salt stress. The first component named seedling characteristics and index seed vigour. The second component named mean germination time, plumule length and wet weight of seedling. The three component named germination characteristics and dry weight of seedling. Based biplot, canola genotypes to three groups was divided. The first PCA separated Hyola401 in the extreme horizontal ends of the biplot, Hyola401 expressed as the tolerant genotype in the right and genotypes of H6661 and Q6503 as the most sensitive genotypes in the left side of the biplot.
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