干旱胁迫下33份木薯种质表型性状的初步分析  

Preliminary Analysis on the Phenotypic Characters of 33 Cassava Germplasms under Drought Stress

作　　者：魏云霞[1] 王晓庆[1] 黄洁[1] 

机构地区：[1]中国热带农业科学院热带作物品种资源研究所,海南儋州571737

出　　处：《热带农业科学》2014年第11期30-34,共5页Chinese Journal of Tropical Agriculture

基　　金：农业部现代农业产业技术体系建设专项资金(No.CARS-12-hnhj)

摘　　要：以33份木薯种质为材料，采用盆栽方法对其进行反复干旱-复水处理，测定株高、茎径、叶片数量和主根数量，并通过方差、相关性和聚类分析，对其耐旱性进行归类。结果表明：33份木薯种质株高、茎径、叶片数量、主根数量的变幅分别为19.5～52.3 cm、3.46～5.90 mm、10.0～17.7片/株、14.0～56.0条/株，试验材料遗传背景丰富，代表性强；土壤含水量与株高、茎径、叶片数量、主根数量相关性均不显著；通过聚类分析可将33份种质分为4类，Ⅳ类仅ZM8316一份种质，其各项表型性状指标均处于较高水平；其次是Ⅲ类，包括CMR35-22-196、 A234、 SC5、 D346、 F709、 C381、 C322。The potted experiment under repeated drying-wetting alternation condition was conducted in Tropical Crops Genetics Resources Institute, CATAS, Hainan, P. R. of China. 4 phenotypic characters were measured to classify the drought tolerance of 33 cassava germplasms through variance analysis, correlation analysis and cluster analysis. The results indicated that the plant height, stem diameter, number of leaves, number of roots of 33 cassava germplasms were 19.5-52.3 cm, 3.46-5.90 mm, 10.0-17.7 per plant, 14.0-56.0 per plant, respectively, it explained that the genetic background of the germplasms was abundant and typical. The correlation coefficient between soil water content and the 4 phenotypic characters wasn＆#39;t significant. The cluster analysis showed that all germplasms could be divided into 4 types, the Ⅳ type was only ZM8316 which phenotypic character values were higher, next was the Ⅲ type that included CMR35-22-196, A234, SC5, D346, F709, C381 and C322.

关 键 词：木薯 种质 干旱胁迫 表型性状 聚类分析 

分 类 号：S533[农业科学—作物学]