关键词: 豌豆, 混合盐胁迫, 萌发期, 耐盐性, 综合评价

Abstract: 【Objective】 The current study was conducted to meet the needs of pea production in Hebei coastal area. 【Method】 32 pea germplasm resources were used as materials to identify and comprehensively evaluate the salt tolerance of pea germplasm under mixed sodium salt stress at germination stage. 【Result】 When the concentration of mixed salt solution increased to 150 mmol/L, the standard deviation of relative germination rate （RGR） among pea varieties （lines） reached the maximum,19.75. principal component analysis showed that the cumulative contribution rate of relative germination rate （RGR）, relative shoot fresh weight （RSFW） and relative germination potential （RGP） reached 80.18%. The 32 pea germplasm resources were divided into four grades according to salt tolerance by cluster analysis,including 8 high salt tolerance varieties （lines）, 3 salt tolerance varieties （lines）, 7 medium tolerance varieties （lines） and 10 salt sensitive varieties （lines）. 【Conclusion】 Pea has salt tolerance, and different pea varieties have different salt tolerance. 150 mmol/L mixed salt stress at germination stage was an effective method to identify the salt tolerance of pea. Relative germination rate （RGR）,relative shoot fresh weight （RSFW） and relative germination potential （RGP） can constitute the evaluation index system of salt tolerance of pea. Eight highly salt-tolerant pea varieties （lines） could be used as parents to further develop excellent varieties of stress-tolerant pea or to conduct introduction test and demonstration promotion in coastal saline-alkali land.

Key words: Pisum sativum, mixed salt stress, germination period, salt tolerance, comprehensive evaluation