واكنش برخي از ارقام و لاين هاي گندم بهاره نسبت به تنش شوري ناشي از كلرور سديم در مرحله جوانه زني بذر

Resistance of Some Spring Wheat Genotypes ( Triticum aestivum L. ) to Salinity (NaCI) at the Germination Stage

This investigation was Saducted to study genetic diversity of salt tolerance in 20 common wheat genotypes, recommending tolerant cultivars to farmers and to use them in the future breeding programs, Length of coleoptile and radicle, coleoptile / radicle ratio, germination speed, mean germination time, fresh and dry weight of coleoptile and radicle, and germination percentage were measured. Germination response of these genotypes to salinity were evaluated by using 5 levels of salinity (control and four levels with electrical conductivity of 4,8,12 and 16 ds/m) in a randomized complete block design with three replications in petri dishes, based on ISTA principles. Results showed that salinity stress had negative and significant effects on all traits studied. Based on cluster and environmental sensitivity analysis it was also revealed that Cross-e-Roshan, Tajan, Atrak, Shirodi and Falat were the most tolerant to salinity as compared to the other cultivars.