Grouping of rice genotypes on the germination and seedling growth under salinity stress condition

The research aimed to study the genetic diversity of 26 rice genotypes in 2013 at the Research Center for Agriculture and Natural Resources Khuzestan province factorial experiment in basis completely randomized design with 3 replications of 24 lines and 2 hybrid as the first factor and salinity stress with NaCl at 4 levels of zero (distilled water), 4, 8 and 12 mmoh/cm as the second factor was implemented. Traits of germination percent, mean germination time, germination rate, radicle length, plumule length, seedling length, ratio of radicle length to plumule, wet weight of seedling, dry weight of seedling, ratio of dry weight to wet and index seed vigor were studied. The principal components analysis, 11 studied traits is divided into 2 components on the basis of 64% of the data changes can be justified. Using cluster analysis were 26 genotypes in three clusters. Lines 15, 19, 20, 48 and 53, according to the results of cluster analysis and biplot rate germination, plumule length, radicle length, seedling length, weight and vigor index lower were. The third cluster lines do not have the tolerance to salinity. Lines 2, 4, 7, 10, 13, 16, 21, 23, 25, 28, 31, 34, 35, 36, 41, 42, 44, 55, with hybrids and Hb2 in the cluster were Hb1 according to principal component analysis and biplot half are salt tolerant. Line 40 was alone in the cluster according to the results of cluster analysis and biplot all traits germination, plumule length, radicle length, seedling length, radicle to plumule ratio, wet weight, dry weight, dry weight and seed vigor was higher than the overall mean and so is salt tolerant.