بررسی تحمل به تنش خشکی لاینهای پیشرفته برنج متحمل به گرمای ایری در مرحله جوانهزنی

This investigation was to study the genetic diversity of 30 rice lines (heat tolerant of IRRI). In 1392 at Khouzestan center for sciens and research of Agricultural and Natural Resurces. The expriment factorial arrangeds compeletly randomized desing with three replications. The treatments consisted of 30 lines with PEG6000 as the firest factor and drought With:5levels(check, -0/3,-1/8,-3/3,-4/8).Analysis of variance showed that the drought levels, lines and thire interactions for all traits, Showed singinificant difference at 1% probability level.The comparison of Means showed that line 139 highest seed germination, seedling length and vigor index. Also root lengtht, shoot and root to shoot ratio, Showed that by increasing the drought, these characters has been declined.