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32个菊花近缘种属植物耐盐性筛选
引用本文:管志勇,陈素梅,陈发棣,尹冬梅,刘兆磊,唐娟,杨帆.32个菊花近缘种属植物耐盐性筛选[J].中国农业科学,2010,43(19):4063-4071.
作者姓名:管志勇  陈素梅  陈发棣  尹冬梅  刘兆磊  唐娟  杨帆
作者单位:(南京农业大学园艺学院)
基金项目:农业部公益性农业行业科研专项,农业部"948"项目,上海市科技兴农重点攻关项目,江苏省高技术研究项目,江苏省科技支撑计划项目 
摘    要:【目的】确定菊花耐盐种质的筛选方法,并以2个栽培菊花品种为对照,对30份菊花近缘种属野生资源进行耐盐性筛选,为耐盐菊花新品种选育提供耐盐种质。【方法】在Hoagland营养液水培条件下,分别设置5个浓度NaCl(0、40、80、120、160、200mmol·L-1)对4份菊花近缘种属植物进行处理,根据单株受害叶面积比率的差异,确定适宜的筛选浓度;在此筛选浓度下对32份材料进行胁迫处理,通过建立受害程度与胁迫时间的数学回归模型,利用回归方程分别求出材料单株受害叶面积达50%所需用时间,以此进行耐盐性排序,并与其它叶片形态受害指标的筛选结果相比较,采用系统聚类法综合各项指标评价各材料耐性。【结果】耐盐筛选适宜浓度为120mmol·L-1,在此胁迫浓度下,各指标的变异系数较大,依据不同指标的耐盐筛选结果间相关性较高;建立了3类共32个回归方程,各方程的回归效果良好。【结论】以叶片形态症状为依据可以对菊花近缘属植物的耐盐性进行快速、有效筛选,根据聚类结果将32份耐盐性材料分为极强、强、中等、敏感4个级别,芙蓉菊、牡蒿、达磨菊耐盐性极强;菊蒿、大岛野路菊耐盐性强;滨菊、黄金艾等7份材料的耐盐性中等,栽培菊、紫花野菊、小红菊、毛华菊、甘菊等20份材料对盐胁迫敏感。

关 键 词:菊花  种质资源  耐盐性  叶片形态指标
收稿时间:2010-01-07;

Salt Tolerance Screening of 32 Taxa from Chrysanthemum and Its Relative Genera
GUAN Zhi-yong,CHEN Su-mei,CHEN Fa-di,YIN Dong-mei,LIU Zhao-lei,TANG Juan,YANG Fan.Salt Tolerance Screening of 32 Taxa from Chrysanthemum and Its Relative Genera[J].Scientia Agricultura Sinica,2010,43(19):4063-4071.
Authors:GUAN Zhi-yong  CHEN Su-mei  CHEN Fa-di  YIN Dong-mei  LIU Zhao-lei  TANG Juan  YANG Fan
Institution:(College of Horticulture, Nanjing Agricultural University)
Abstract:【Objective】 In order to establish a method for salt tolerance screening of Chrysanthemum as well as to discover salt tolerant germplasms for chrysanthemum breeding, salt tolerance of 30 species from Chrysanthemum and its relative genera was identified in comparison with two chrysanthemum cultivars. 【Method】 Four species from Chrysanthemum and its relative genera were hydroponically cultured in Hoagland solution supplemented with NaCl at different concentrations of 0, 40, 80,120, 160 and 200 mmol?L-1, respectively. The proper screening concentration of NaCl was determined using the ratio of injured leaf area per plant. The regression equation models regarding the correlation between the stressed duration and the ratio of injured leaf area per plant were established, from which the time when the ratio of injured leaf area per plant reached 50% of the whole plant was figured out. The salt tolerance of 32 taxa was sequenced based on the time. This sequence was compared with those judged from other leaf morphological indexes. A comprehensive evaluation of salt tolerance of 32 taxa was made by using hierarchical clustering analysis.【Result】The proper NaCl concentration for screening salt-tolerance was 120 mmol?L-1. Variation coefficients of different indexes under the NaCl concentration were great, and correlation coefficient between sequences of salt tolerance based on different indexes was high. Three types of equations including 32 regression equations were established, and the regression equations all demonstrated good regression effects. 【Conclusion】 Salt tolerance screening of plants from Chrysanthemum and its relative genera can be achieved effectively and rapidly by leaf morphological indexes. Clustering analysis showed that 32 taxa could be divided into extremely salt tolerant, salt tolerant, moderately salt tolerant and salt sensitive grade, respectively. Artemisia japonica, Aster spathulifolius, Crossostephium chinense are extremely salt tolerant, Tanacetum vulgare and Chrysanthemum crassum are salt-tolerant, seven taxa represented by Artemisia vulgaris, Leucanthemum vulgare are moderately salt tolerant, 14 taxa represented by Chrysanthemum zawadskii, Ch. chanetii, Ch.vestitum, Ch. lavandulifolium are salt sensitive ones.
Keywords:chrysanthemum  germplasms  salt tolerance  leaf morphological indexes
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