Multivariate analysis of forage sorghum [Sorghum bicolor (L.) Moench] lines for salinity tolerance at germination stage

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Research Paper 01/09/2013
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Multivariate analysis of forage sorghum [Sorghum bicolor (L.) Moench] lines for salinity tolerance at germination stage

Zahra Khodarahmpour
Int. J. Biosci.3( 9), 8-15, September 2013.
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This study was conducted to evaluate the effect of salinity on the germination and early growth of forage sorghum lines. In order to an experiment was performed as factorial form under completely randomized design (CRD) with 3 replications. Line factor was contains of 15 lines and 5 levels of salinity (control, -3, -6, -9 and -12 bar) with NaCl. Results of correlation showed that seedling length had the most positive and significant correlation with radicle length (r=0.99**). Factor analysis based on principal component analysis showed that three independent factors 79% of all variation data determined. The first component named germination percentage, seedling length and index seed vigour. The second component named germination characteristics and dry/wet weight ratio of seedling. The three component named mean germination time, plumule length and dry weight of seedling. Cluster analysis (Ward’s minimum variance method) and bipot arranged lines into two groups. Based biplot, lines of KFS2, KFS6, KFS7, KFS8, KFS9, KFS10 and KFS11 were low sensitive to salinity stress. The lines KFS1, KFS12, KFS13, KFS15, KFS16, KFS17 and KFS18 were high sensitive to salinity stress.


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