Evaluation on Alkali Tolerance of Potato Germplasm Resources and in vitro Screening of Alkali Tolerant Germplasms
Liu Fang
Chen Guangxia
Zhao Peng
Yu Shaowei
Yang Yuanjun
Abstract：Twelve salt-tolerant and ten salt-insensitive germplasms screened from more than 1 000 potato germplasms in former experiment were used as materials.The effective growth rate of plants was determined un-der 0,5,10,15 mmol/L and 20 mmol/L NaHCO3 stress,and the regression equation of NaHCO3 concentration and effective growth rate of plants was established.According to the regression equation,the NaHCO3 concentra-tion was 11.60 mmol/L when the effective plant growth rate reached 50%.Therefore,11.60 mmol/L NaHCO3 was determined to be the appropriate alkali concentration for screening the saline-alkali tolerant potato germ-plasm.Then,at the concentration of 11.60 mmol/L NaHCO3,the effective growth rate,plant height,root num-ber,stem and leaf fresh weight and root fresh weight of the tested materials were determined,and the alkali tol-erance coefficients of these indexes were calculated.According to the indexes values and alkali tolerance coeffi-cients,the alkali tolerance of the tested materials was evaluated comprehensively,and two alkali resistant germ-plasm D56 and B154 were selected.The results of alkali tolerance identification showed that B154 and D56 had strong adaptability to 20 mmol/L NaHCO3 stress,and the weight of stem and leaves were 34.48%and 14.56%of that of the control respectively,the root weight were 31.25%and 9.33%of that of the control respectively,and the plant height was 64.77%and 48.90%of that of the control respectively.
Keywords：PotatoAlkali toleranceComprehensive evaluationGermplasm screening
Publication Date：2023-11-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 73-78 )