甜瓜种质资源芽苗期和幼苗期耐NO_3^-性评价及鉴定指标筛选  

Evaluation and Selection of Identification Indices for NO_3^- Tolerance at Sprout and Seedling Stages of Melon Germplasms

作　　者：赵卫星[1] 常高正[1] 高宁宁[1] 李海伦 梁慎[1] 康利允[1] 徐小利[1] 李晓慧[1] 

机构地区：[1]河南省农业科学院园艺研究所,河南郑州450002

出　　处：《河南农业科学》2018年第1期84-89,共6页Journal of Henan Agricultural Sciences

基　　金：国家西甜瓜产业技术体系建设项目(CARS-26);河南省科技攻关项目(162102110099);河南省农业科学院自主创新项目

摘　　要：为筛选出耐盐性甜瓜材料和提供早期鉴定指标,利用150 mmol/L NO_3^-对23份甜瓜种质芽苗期和幼苗期进行胁迫处理,以多项指标盐害系数隶属函数值和总隶属函数值为依据,比较了2个时期不同种质的耐盐性,并进行了耐盐性鉴定指标的筛选。结果表明,不同甜瓜种质对NO_3^-胁迫处理的响应有明显差异,芽苗期和幼苗期耐盐性材料有4份相同,分别占芽苗期和幼苗期耐盐材料的57.14%和25.00%,耐盐和中等耐盐材料相同率为90.00%;并筛选出胚根干质量、主胚根长可作为芽苗期耐盐性鉴定指标,茎粗、根干质量、壮苗指数、叶绿素a+b/类胡萝卜素、地上部干质量可作为幼苗期耐盐性鉴定指标。In order to screen salt-tolerant materials and provide early identification indices of melon,150 mmol/L NO_3^- solution was used to treat 23 melon germplasms at sprout and seedling stages,and based on subordinate function values and total subordinate function value of salt damage coefficient,the salt tolerance was compared and the salt tolerance identification indexes were screened. The result showed that the responses of different melon germplasms to NO_3^- stress treatment were obviously different and salt tolerance at sprout and seedling stages was varied. Four salt tolerant materials were the same,which occupied 57. 14% and 25. 00% of salt tolerant materials at sprout stages and seedling stages respectively,and the same rate of salt tolerant and medium salt tolerant materials was 90. 00%. Radicle dry weight and main radicle length were screened as salt resistance identification indexes for melon at sprout stages,and stem diameter,root dry weight,strong seedling index,chlorophyll a ＋ b/carotenoids and above ground dry weight could be used as salt resistance appraisal indicators for melon at seedling stage.

关 键 词：甜瓜种质 芽苗期 幼苗期 耐NO3-性 鉴定指标 

分 类 号：S652[农业科学—果树学]