Abstract
Wet endurance in F1 hybrids and F2 populations and the heritability in early generations in barley were estimated to improve wet endurance of malting barley. Materials were grown under excess soil moisture treatment (irrigated condition) at the internode elongation stage. Selection character for wet endurance was degree of dead leaf expressed by the score 0 (most tolerant)∼5(most susceptible) under excess soil moisture treatment, because degree of dead leaf under excess soil moisture treatment showed signifi-cant correlation to the reduction ratios of grain yield per plant and culm length by the treat-ment (the mean value of excess soil moisture plot/that of control plot). Mean damages of F1 hybrids (5 cross cornbinations) under excess soil moisture treatment were less than those of their midparents, indicating the heterosis of wet endurance. Frequency distributions of the degree of dead leaf in F2 populations under excess soil moisture treatment showed continuous variation. Therefore, wet endurance of barley seerns to be due to the effect of polygene.
