37份菊花近缘种的抗旱性评价  

Evaluation of drought resistance in 37 accessions of chrysanthemumrelated species

作　　者：周迎雪 李沛曈 苏江硕 王海滨[1] 房伟民[1] 陈发棣[1] 张飞[1] ZHOU Yingxue;LI Peitong;SU Jiangshuo;WANG Haibin;FANG Weimin;CHEN Fadi;ZHANG Fei(National Key Laboratory of Crop Genetics&Germplasm Enhancement and Utilization/Key Laboratory of Flower Biology and Germplasm Enhancement(South),Ministry of Agriculture and Rural Affairs/Key Laboratory of National Forestry and Grassland Administration on Biology of Ornamental Plants in East China/Zhongshan Biological Breeding Laboratory/College of Horticulture,Nanjing Agricultural University,Nanjing 210095,China)

机构地区：[1]南京农业大学作物遗传与种质创新利用全国重点实验室/农业农村部花卉生物学与种质创制重点实验室(南方)/国家林业和草原局华东地区花卉生物学重点实验室/钟山生物育种实验室/园艺学院,江苏南京210095

出　　处：《南京农业大学学报》2023年第6期1060-1068,共9页Journal of Nanjing Agricultural University

基　　金：国家自然科学基金项目(31870306);国家现代农业产业技术体系建设项目(CARS-23-A18)。

摘　　要：[目的]本文旨在通过测定干旱胁迫下植物形态学指标,对37份菊花近缘种的抗旱性进行综合评价,挖掘优异抗旱性菊花近缘种,为菊花抗旱新品种培育提供重要亲本材料。[方法]利用盆栽控水法对37份菊花近缘种进行干旱胁迫处理,测定其地上和地下部鲜干重、株高、根长、萎蔫指数、鲜重根冠比等9个抗旱相关性状,研究菊花近缘种对干旱胁迫的表型可塑性响应模式;结合主成成分分析,采用隶属函数法和聚类分析对不同材料的抗旱性进行综合评价并分类。[结果]干旱处理组与对照组(正常浇水)各性状存在极显著差异,9个性状干旱胁迫指数的变异系数为12.79%~72.00%,表型可塑性指数为0.37~0.90。基于抗旱性综合评价和聚类分析将供试材料分为强抗旱、抗旱、低抗旱和不抗旱4类,平均综合抗旱指数D值依次为0.80、0.54、0.42和0.26。[结论]干旱胁迫显著影响菊花近缘种的生长,从37份菊花近缘种中筛选出云台山野菊、伏牛山野菊、毛华菊和萨摩野菊4份强抗旱种质,可为菊花抗旱性遗传改良提供重要亲本材料。[Objectives]The purpose of this study was to evaluate the drought resistance of 37 accessions of chrysanthemum related species by measuring morphological traits to excavate excellent drought-resistant germplasm,providing important parental materials for cultivating of new drought-resistant chrysanthemum varieties.[Methods]A total of 9 morphological traits,i.e.,fresh and dry weight of shoot and root,plant height,root length,wilting index,fresh and dry root-shoot ratio,were investigated for a set of 37 accessions of chrysanthemum related species under drought stress condition.Then,the phenotypic plasticity in response to drought stress was analyzed,and the drought resistance of different species was evaluated by membership function analysis,cluster analysis,and principal component analysis.[Results]The investigated traits exhibited significant differences between control(normal watering)and drought conditions,with the coefficient of variation ranging from 12.79%to 72.00%and the phenotypic plasticity index varying in a range of 0.37-0.90.Based on the membership function method and cluster analysis,the tested materials were divided into strong resistance,moderate resistance,low resistance,and susceptibility types,and the average comprehensive drought resistance index D-value was 0.80,0.54,0.42 and 0.26,respectively.[Conclusions]Drought stress significantly affected the growth of chrysanthemum related species.The chrysanthemum related species with strong drought resistance,i.e.,Chrysanthemum indicum in Yuntaishan and Funiushan,Chrysanthemum vestitum,Chrysanthemum ornatum,could be used as candidate parental materials for the genetic improvement of cultivated chrysanthemum targeting drought resistance.

关 键 词：菊花 种质资源 干旱胁迫 抗旱性 综合评价 

分 类 号：S682.11[农业科学—观赏园艺]