Drought Resistance Identification of Peanut Germplasm Resources at Seedling Stage
In order to explore the characteristics of drought resistance of peanut germplasms at seedling stage,a drought resistance evaluation system was established and drought-resistant materials were screened.In this study,129 peanut germplasms were used as experimental materials,and the drought stress test was carried out with PEG 6000 by using indoor hydroponic culture.The indexes of chlorophyll,plant height,fresh/dry mass of above ground,and fresh/dry mass of root of peanut were determined.The drought resist-ance of peanut germplasms was evaluated and graded by correlation analysis,membership function method and principal component analysis.The results showed that the root dry mass and chlorophyll value under drought stress were higher than those in the control group.Principal component analysis simplified the 6 traits into 3 principal components(the cumulative contribution rate was 68.6％),and determined that chlorophyll,plant height and fresh mass of above ground could be used as evaluation indexes for drought resistance of pea-nut germplasms.According to the sequence analysis of D value,2 highly drought-resistant peanut germ-plasms,namely Xinshi silihong and Xinyuche peanut,were initially selected,which provided materials for further developing of drought-resistant breeding and digging of drought-resistant genes in peanut.
peanutseedling traitsevaluation of drought resistancegermplasm selection
万方数据
维普
