A Grant of Drought Avoidance and Efficient Water Use because of Dwarfing Genes Utilization(Crop Physiology and Cell Biology)

[摘要] Tall and dwarf isogenic lines of sorghum (Plainsman tall type and Plainsman short type), soybean (Hyuga and Hyuga dwarf line), and rice (Ginbozu and Tangin) were grown by using 15 L containers to compare the relationships between consumptive use (CU) and dry matter increase (ΔW) and the yield between them. The linear relationships were found between CU and ΔW. CU at ΔW=0 was nearly equal to evaporation (Es), except for two soybean strains. Transpiration efficiency (ΔW/[CU-Es]) did not differ significantly between tall and dwarfisogenic lines. Hyuga consumed the largest amount of water because it had large ΔW and low transpiration efficiency (TE) and larger CU at ΔW=0. Two sorghum strains did not differ in CU from Ginbozu and Tangin because of their larger ΔW, respectively, though they had the highest TE. Dwarf lines were always smaller in CU than tall lines were in all the examined crops. Furthermore, they were inferior to tall lines in the absolute yield, but they tended to be less in CU to achieve the same yield. These characteristics of dwarf lined will be useful in both viewpoints of the avoidance of drougt injury and the efficient use of water.

[学科分类] 农业科学（综合）

[关键词] Consumptive use;干ばつ回避性;Drought avoidance;乾物増加量;Dry matter increase;収量;Dwarfing genes;蒸散効率;Transpiration efficiency;水消費量;Yield;矮性遺伝子