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To investigate the drought tolerance characteristics of different peanut germplasms, screen out the drought-tolerant germplasms, and establish evaluation criteria, 25 peanut germplasms were utilized as materials in this experiment. The treatments of normal irrigation and drought stress were established in a rain-proof greenhouse, and the peanuts' photosynthetic characteristics, morphological indicators, and yield traits during the flowering and pegging stages were measured and analyzed, as well as a comprehensive drought resistance evaluation was conducted using principal component analysis, cluster analysis, membership functions, and the composite drought resistance coefficient(CDC). The results showed that drought stress significantly suppressed stomatal conductance and transpiration rates, while its effects on other photosynthetic parameters varied among germplasms. The average pod mass per plant decreased significantly for most germplasms, with agronomic traits exhibiting pronounced interspecific differences in response to drought stress. Principal component analysis optimized the original trait indicators into four new composite drought resistance indices, achieving a cumulative contribution rate of 81.65%. Cluster analysis grouped the 25 peanut germplasms into three categories as drought-tolerant peanut materials(5 samples, 20% of the total), moderately drought-tolerant peanut materials(11 samples, 44% of the total), and drought-sensitive peanut materials(9 samples, 36% of the total). The research findings provide a material foundation and theoretical basis for the screening of drought-tolerant germplasm resources and the breeding of drought-resistant varieties.
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Basic Information:
DOI：10.14001/j.issn.1002-4093.2026.02.007
China Classification Code:S565.2
Citation Information:
[1]YIN Yechao,CHEN Chongpeng,QI Jianuo ,et al.Screening and Evaluation of Drought Tolerance of Different Peanut Germplasms[J].Journal of Peanut Science,2026,55(02):207-218.DOI:10.14001/j.issn.1002-4093.2026.02.007.
Fund Information:
财政部和农业农村部：国家现代农业产业技术体系(CARS-13); 辽宁省种质创新藏粮于技专项计划(2023JH1/10200002); 辽宁省农业科学院基本科研业务费协同创新专项(2025XTCX0404);辽宁省农业科学院花生育种与栽培学科建设(2025XKJS8556); 辽宁省科技重大专项(2025JH1/11700015)
2026-03-16
2026-03-16
2026-03-16