Cai Debao
Nanang Normal UniversityYang Shuqiong
Nanang Normal UniversityMa Junyan
Nanang Normal UniversityChen Jibao
Nanang Normal UniversityNanang Normal University
Science and Technology Project of Henan Province(212102110248)
Drought is the most important abiotic stress factor limiting the growth of common bean. In this study, 60 representative common bean germplasms were treated with drought stress using natural drought method. 12 leaf physiology characters, such as leaf electrical conductivity, water use efficiency (WUE) and 5 the Photosysm II chlorophyll fluorescence parameters, were analyzed between drought stress treatment group and control group. The drought tolerance of 60 common beans was evaluated by seedling wilting grade and drought tolerance subordinate function value (D value). The results showed that 6 varieties,including F00000017, F00000518, F00002179, F00003370. F00004321 and Nanyang Black variety, were classified as the strongest drought tolerance variety based on the leaf wilting index. Among the 6 varieties, 5 varieties except for Nanyang Black variety were also identified as the strongest drought tolerance variety based on the D value. 6 varieties, including F00001280、F00003346、F00005237、F00004357、F00004392 and F00005243, were classified as the strongest drought-susceptible variety based on the leaf wilting index. F00001280、F00003346、F00005237 were also identified as the strongest drought-susceptible variety based on D value. These results indicated that there were higher consistency in identifying the common bean drought tolerance between the seedling wilting grade method and drought tolerance subordinate function value (D value) method. The strongest drought tolerance varieties and the strongest drought-susceptible varieties identified in this study could be used in the study of common bean drought tolerance mechanism and breeding.