Identification and screening of turnip germplasm resources for drought resistance
In order to evaluate the drought resistance of turnip seedlings and screen the drought-resistant germplasm,40 turnip germplasm resources were used as experimental materials,and the seedling potting test was set up with two treat-ments of drought and normal watering to determine 19 drought-resistant evaluation indexes,such as morphological index-es,chlorophyll content,drought index,mortality rate,and so on,and the drought-resistant evaluation and drought resis-tance identification index screening were carried out on turnip seedlings using correlation analysis,principal component analysis,and the affiliation function method.The results showed that drought stress reduced plant height,stem thickness,leaf length and width,aboveground fresh mass and dry mass,chlorophyll content and other indexes of turnip,but had posi-tive and negative effects on underground indexes.Fourty germplasm could be classified into 11 drought-sensitive variet-ies,5 drought-resistant varieties and 24 moderately drought-resistant varieties,among which the drought-resistant turnip material was B9,and the drought-most sensitive material was B2,leaf length,leaf width,petiole length,main root length,root volume,aboveground fresh mass,underground fresh mass,underground dry mass,root-crown ratio,and drought in-dex were used as important indexes for the evaluation of drought resistance of turnip seedlings.
TurnipSeedling drought toleranceIdentification and screening
万方数据
维普
