Selection of cold tolerant mutant lines in naked barley (Hordeum vulgare L.)

In order to screen the cold tolerant mutant lines in naked barley, seeds of recommended variety Baekdong were treated with X-rays of 25 kR. Two cold tolerant mutant lines were selected under field conditions with the lowest winter temperature being from -13 deg. C to -20 deg. C, during M2 to M5 generations. The number of vascular bundles of cold tolerant mutant line BM-5 was decreased and culm diameter was thicker than that of the parent line. Important characters of cold tolerant mutant line BM-5 were similar to those of the parent line. (author). 6 refs, 1 fig., 3 tabs