Evaluation and Screening of Soybean Drought Resistance During Germina-tion and Whole Growth Period
In this study,we evaluated 200 highly diverse soybean varieties to identify the drought tolerant soybean germplasm with excellent agronomic traits and to evaluate the accuracy and efficiency of drought tolerant screen-ing methods in soybean.Statistical analysis was performed on various seed germination related traits,like,seed germination potential,the relative germination rate and the relative germination index and six yield related agro-nomic traits.These results help identify 15 highly drought-tolerant soybean varieties based on correlation analysis between injury rate and germination related traits under drought stress.For the evaluation of drought tolerance in the whole growth period,five drought tolerant varieties were screened out based on the drought resistance index(DI),the drought tolerance coefficient(DC)and the weighted drought tolerance coefficient(WDC).Furthermore,according to the comprehensive drought tolerant evaluation in different periods,we screened out'Huaidou 16','Gongxuan 1','Gongkedou 8'and other 6 varieties with excellent agronomic traits and drought tolerance in the ger-mination period and the whole growth period by the principal component analysis method.Meanwhile,the results of drought tolerance evaluation methods in different periods of soybean were analyzed.These results showed a sig-nificant correlation between the comprehensive drought tolerance evaluation system and different evaluation meth-ods in different periods,which indicated that these methods could comprehensively and effectively evaluate the drought tolerance of soybean germplasm.In summary,the results of this study provided robust methods for the screening of soybean drought-tolerant germplasm with excellent agronomic traits for the breeding of new drought-resistant varieties with higher production capability.
SoybeanDrought resistanceGermination periodWhole growth period
NETL
NSTL
万方数据
维普
