197份陆地棉品种萌发期耐盐性鉴定  

Identification of salt tolerance of 197 upland cotton varieties at germination stage

作　　者：刘慧杰 王俊豪 龚照龙[2] 梁亚军[2] 王俊铎[2] 李雪源[2] 郑巨云[2] 王冀川[1] LIU Huijie;WANG Junhao;GONG Zhaolong;LIANG Yajun;WANG Junduo;LI Xueyuan;ZHENG Juyun;WANG Jichuan(College of agriculture,Tarim University,Aral Xinjiang,843300,China;Cash Crops Research Institute of Xinjiang Academy of Agricultural Science,Urumqi 830001,China)

机构地区：[1]塔里木大学农学院,新疆阿拉尔843300 [2]新疆农业科学院经济作物研究所,乌鲁木齐830091

出　　处：《新疆农业科学》2024年第7期1574-1581,共8页Xinjiang Agricultural Sciences

基　　金：国家重点研发计划项目“干旱盐碱区棉花耐盐碱基因资源挖掘与利用”(2022YFD1200304-4);国家科技创新2030—重大项目“耐逆丰产棉花新品种设计与培育”(2023ZD04040-5)。

摘　　要：【目的】鉴定评价陆地棉品种资源萌发期耐盐性,筛选耐盐性优异的种质,鉴定分析耐盐指标,为陆地棉育种改良提供理论支持。【方法】以197份国内外陆地棉品种为材料,以0(CK)、150和200 mmol/L的氯化钠(NaCl)为胁迫处理浓度,测试对照组与处理组的发芽势、发芽率、根长及相对值等9个指标,采用隶属函数法,利用综合评价D值评价197份陆地棉品种的耐盐性。【结果】150 mmol/L适合作为鉴定萌发期耐盐性的盐胁迫浓度,处理组的变异系数均高于对照组,综合评价D值与处理组各性状之间均存在显著性正相关性,综合评价D值为第一主成分因子,筛选出4份高耐材料、39份耐盐材料、65份中耐材料和89份敏盐材料。【结论】发芽势、发芽率和根长及其相对值等9个数据可作为耐盐性鉴定指标,筛选出20N705、C6524等43份耐盐性较强的材料。【Objective】By identifying and evaluating the salt tolerance of upland cotton germplasm resources during the germination stage,this research can select good salt-tolerance germplasms.Based on this evaluation,the indicators of salt tolerance identification can be clarified,which provides theoretical support for the breeding improvement of upland cotton.【Methods】In this study,197 varieties of upland cotton from both domestic and international sources were used as experimental materials.Salt stress treatments were administered at sodium chloride(NaCl)concentrations of 0(as the control),150,and 200 mmol/L.Nine parameters,including germination potential,rate,root length,and their relative measurements,were evaluated for the control and treatment groups.To assess the salt tolerance of these cotton varieties,a membership function method was applied,utilizing a comprehensive D-value for evaluation.【Results】The results indicated that a concentration of 150 mmol/L is ideal for determining salt tolerance in upland cotton during the germination stage.The coefficient of variation in the treatment group was consistently higher compared to the control group.A significant positive correlation was observed between the comprehensive D-value and the various traits of the treated plants.The comprehensive D-value as the primary factor.Based on a thorough evaluation,4 materials were classified as highly salt-tolerant,39 materials as salt-tolerant,65 materials as moderately salt-tolerant,and 89 materials as salt-sensitive.【Conclusion】The study indicated that nine metrics,such as germination potential,germination rate,root length,and their respective relative values,are effective indicators for assessing salt tolerance.Among the tested materials,forty-three,including varieties 20N705 and C6524,demonstrated notably strong salt tolerance.

关 键 词：棉花 萌发期 耐盐性 隶属函数值 综合评价 

分 类 号：S512[农业科学—作物学]